Publication List

PhD Thesis  

J.G. Hartnett, “Secondary frequency standards: Frequency-temperature compensated resonator design and improved frequency discriminators,” PhD thesis, passed with distinction, Physics Dept, University of WA, 210 pages, 2000.

REFEREED BOOK CHAPTERS

B1.    J.G. Hartnett, M.E. Tobar, “Frequency-temperature compensation techniques for high-Q microwave resonators,” invited review paper in Frequency Measurement and Control: Advanced Techniques and Future Trends, Editor: A.N. Luiten, Springer-Verlag Topics in Applied Physics, Vol 79, pp. 67-91, 2001.

B2.    ME Tobar, PL Stanwix, EN Ivanov, AC Fowler, JG Hartnett, J-M le Floch, MM Miao, P Wolf, “Precision microwave oscillators and interferometers to test Lorentz invariance in electrodynamics,” refereed book chapter in Rencontres de Moriond on Gravitation, Ed. Jacques Dumarchez, pp.227-234, La Thuile, March 2007.

B3.    J.G. Hartnett and M.E. Tobar, “Properties of Gravitational Waves in an Expanding Universe,” invited chapter in Relativity: Modern Large-Scale Spacetime Structure of the Cosmos, Editor: M. Carmeli, World Scientific, Singapore, Chapter 9, pp. 283-295, 2008.

B4.    J.G. Hartnett, “Spiral Galaxy Rotation Curves in the Brane World Theory in Five Dimensions,” invited chapter in Relativity: Modern Large-Scale Spacetime Structure of the Cosmos, Editor: M. Carmeli, World Scientific, Singapore, Chapter 10, pp. 297-317, 2008.

B5.    J.G. Hartnett and F.J. Oliveira, “Testing CGR against High Redshift Observations,” invited chapter in Relativity: Modern Large-Scale Spacetime Structure of the Cosmos, Editor: M. Carmeli, World Scientific, Singapore, Chapter 13, pp. 343-361, 2008.

B6.    J.G. Hartnett, “Extending the Hubble Diagram to Higher Redshifts in CGR,” invited chapter in Relativity: Modern Large-Scale Spacetime Structure of the Cosmos, Editor: M. Carmeli, World Scientific, Singapore, Chapter 14, pp. 363-380, 2008.

B7.    J.G. Hartnett, “Spheroidal and Elliptical Galaxy Velocity Dispersion from CGR,” invited chapter in Relativity: Modern Large-Scale Spacetime Structure of the Cosmos, Editor: M. Carmeli, World Scientific, Singapore, Appendix C, pp. 409-420, 2008.

B8.    J.G. Hartnett, “The Large Structure of the Universe Determined from Carmeli’s Cosmology is an Accelerating Universe without Dark Matter,” invited chapter in Relativity, Gravitation, and Cosmology: New Developments, Editor: V.V. Dvoeglazov, Nova Science Publishers, pp. 57-72, 2010.

B9.    M.E. Tobar, S.R. Parker, P.L. Stanwix, J.G. Hartnett, E.N. Ivanov, M. Nagel, A. Peters, M. Mewes, “A rotating cryogenic sapphire oscillator for tests of Lorentz invariance,” refereed book chapter in Rencontres de Moriond on Gravitation, E Ed. Jacques Dumarchez, La Thuile, March 2011.

REFEREED JOURNAL PUBLICATIONS

J1.    J.G. Hartnett, M.E. Tobar, A.G. Mann, J. Krupka, E.N. Ivanov, “Temperature Dependence of Ti3+ doped sapphire whispering gallery mode resonator,” Electronics Letters, 34, 2, 195-196, 1998.

J2.    M.E. Tobar, J. Krupka, J.G. Hartnett, E.N. Ivanov, RA Woode, “High-Q sapphire-rutile frequency-temperature compensated microwave dielectric resonators,” IEEE Trans. on UFFC, 45, 3, 830-836, 1998.

J3.    J.G. Hartnett, M.E. Tobar, A.G. Mann, E.N. Ivanov, J. Krupka, R. Geyer, “Frequency-temperature compensation in Ti3+ and Ti4+ doped sapphire whispering gallery mode resonators,” IEEE Trans. on UFFC, 46, 4, 993-999, 1999

J4.    M.E. Tobar, J.G. Hartnett, P. Blondy, J. Krupka, E.N. Ivanov, P. Guillon, “Design of high-Q frequency-temperature compensated dielectric resonators,” Electronics Letters, 35, 4, 303-305, 1999.

J5.    J. Krupka, K. Derzakowski, M.E. Tobar, J.G. Hartnett, R.G. Geyer, “Complex permittivity of some ultralow loss dielectric crystals at cryogenic temperatures,” Meas. Sci. Technol., 10, 4, 387-392, 1999.

J6.    R. Ratheesh, M.T. Sebastian, M.E. Tobar, J.G. Hartnett, D.G. Blair, “Whispering gallery mode microwave characterisation of Ba(Mg,Ta)O dielectric resonators,” J. Phys. D: Appl. Phys., 32, 2821-2826, 1999.

J7.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Blondy, P. Guillon, “Cryogenically cooled sapphire-rutile dielectric resonator for ultra-high frequency stable oscillators for terrestrial and space applications,” Special Issue on “Microwave and Communications Application at Low Temperatures” for IEEE Trans on MTT, 48, 7, 1265-1269, 2000.

J8.    J.G. Hartnett, M.E. Tobar, E.N. Ivanov and D. Cros, “High-Q frequency-temperature compensated sapphire/rutile resonator,” Electronics Letters, 36, 8, 726-727, April, 2000

J9.    J.G. Hartnett, E.N. Ivanov, M.E. Tobar, “Microwave secondary frequency standards:  Stability limits due to intrinsic fluctuations in frequency discriminator,” Microwave and Guided Wave Letters, 10, 4, 328-330, 2000.

J10.  E.N. Ivanov, J.G. Hartnett, M.E. Tobar, “Cryogenic microwave amplifiers for precision measurements,” IEEE Trans. on UFFC, 47, 6, 1273-1274, 2000.

J11.  R. Ratheesh, M.T. Sebastian, P. Mohanan, M.E. Tobar, J.G. Hartnett, R. Woode, D.G. Blair, “Microwave characterisation of BaCe2Ti5O15 and Ba5Nb4O15 ceramic dielectric resonators using whispering gallery mode method,” Materials Letters, 45, 5, 279-285, 2000.

J12.  M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Blondy, P. Guillon, “Analysis of the rutile-ring method of frequency temperature compensating a high-Q whispering gallery sapphire resonator,” IEEE Trans. on UFFC, 48, 3, 812-820, 2001.

J13.  J.G. Hartnett, M.E. Tobar, J. Krupka, “Complex paramagnetic susceptibility in titanium-doped sapphire at microwave frequencies,” J. Phys. D: Applied Phys., 34, 959-967, 2001

J14.  M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Blondy “Whispering gallery method of measuring complex permittivity in highly anisotropic materials: Discovery of a new type of mode in anisotropic dielectric resonators,” IEEE Trans. on Instrum. & Meas., 50, 2, 522-525, 2001.

J15.  J.G. Hartnett, M.E. Tobar, E.N. Ivanov, “Novel interferometric frequency discriminators for low noise microwave applications,” IEEE Trans. on UFFC, 48, 3, 743-749, 2001.

J16.   J.G. Hartnett, M.E. Tobar, E.N. Ivanov, P. Bilski, “Temperature fluctuations in a solid-nitrogen cooled secondary frequency standard,” Cryogenics, 42, 1, 42-48, 2002.

J17.   M.E. Tobar, J.G. Hartnett, J.D. Anstie, “Proposal for a new Michelson-Morley experiment using a single whispering spherical mode resonator,” Physics Review A, 300, 33-39, 2002.

J18.  M.E. Tobar, E.N. Ivanov, C.R. Locke, J.G. Hartnett, D. Cros, “Cryogenic dual-mode resonator for a fly-wheel oscillator for a caesium frequency standard,” IEEE Trans. on UFFC, 49, 10, 1349-1355, 2002.

J19. J.G. Hartnett, A.N. Luiten, J. Krupka, M.E. Tobar, P. Bilski, “Influence of paramagnetic chromium ions in crystalline YAG at microwave frequencies,” J. Phys. D: Appl. Physics, 35, 1459-1466, 2002.

J20.  J.G. Hartnett, M.E. Tobar, D. Cros, P. Guillon, J. Krupka, “High Q-factor Bragg reflection sapphire-loaded cavity TE01d mode resonator,” IEEE Trans. on UFFC, 49, 12, 1628 –1634, 2002.

J21. M.E. Tobar, E.N. Ivanov, C.R. Locke, J.G. Hartnett, “Difference frequency technique to achieve frequency-temperature compensation in whispering-gallery sapphire resonator-oscillator,” Electron. Lett., 38, 17, 948-950, 2002.

J22. M.E. Tobar, E.N. Ivanov, C.R. Locke, J.G. Hartnett, D. Cros, “Improving the frequency stability of microwave oscillators by utilizing the dual-mode sapphire-loaded cavity resonator,” Meas. Sci. Technol., 13, 8, 1284-1288, 2002.

J23. M.E. Tobar, G.L. Hamilton, E.N. Ivanov, J.G. Hartnett, “New method to build a high stability sapphire oscillator from the temperature compensation of the difference frequency between modes of orthogonal polarization,” IEEE Trans. on UFFC, 50, 3, 214-219, 2003.

J24.  J.D. Anstie, J.G. Hartnett, M.E. Tobar, J. Winterflood, D. Cros and J. Krupka, “Characterization of a spherically symmetric fused-silica-loaded cavity microwave resonator,” Meas. Sci. Technol., 14, 3, 286-293, 2003

J25. M.E. Tobar, J.G. Hartnett, “Proposal for a new test of the time independence of the fine structure constant, a, using orthogonally polarised whispering gallery modes in a single sapphire resonator,” Phys. Rev. D, 67, 062001, 2003

J26. M.E. Tobar, C.R. Locke, E.N. Ivanov, J.G. Hartnett, O. Piquet, D. Cros, “High-Q factor frequency-temperature compensated sapphire Bragg distributed resonator,” Electronics Letters, 39, 3, 293-295, 2003.

J27. K. Watabe, S. Ohshima, T. Ikegami, J.G. Hartnett, “Tunable double-sapphire-loaded microwave cavity with high-Q factor,” IEICE Trans. Electron., E86-C, 7, 1393-1395, 2003.

J28.   M.E. Tobar, D. Cros, J.G. Hartnett, P. Blondy, P. Guillon, “Simple design rules for optimal design of dielectric temperature-compensated sapphire resonators,” IEEE Trans. on UFFC, 50, 9, 1204-1206, 2003

J29.   M.E. Tobar, J.D. Anstie, J.G. Hartnett, “High-Q whispering modes in empty spherical cavity resonators,” IEEE Trans. on UFFC, 50, 11, 1407-1413, 2003

J30.   M.E. Tobar, G.L. Hamilton, J.G. Hartnett, E.N. Ivanov, D. C. Dros, P. Guillon, “The dual-mode frequency-locked technique for the characterization of the temperature coefficient of permittivity of anisotropic materials,” Meas. Sci. Tech., 15, 1, 29 -34, 2004

J31.   J.G. Hartnett, M.E. Tobar, J. Krupka, “The dependence of the permittivity of sapphire to thermal deformation at cryogenic temperatures,” Meas. Sci. Tech., 15, 1, 203 – 210, 2004

J32.   J.G. Hartnett, P.Y Bourgeois, J.D. Anstie, M.E. Tobar, N. Bazin, E.N. Ivanov, D. Cros, V. Giordano, Y. Kersalé, “High-Q frequency-temperature compensated solid-nitrogen-cooled resonator-oscillators: first results,” Electron. Lett., 40, 1, 41-42, 2004.

J33.   J.G. Hartnett, A.C. Fowler, M.E. Tobar, J. Krupka, “The microwave characterization of single crystal Lithium and Calcium Fluoride at cryogenic temperatures,” Trans on UFFC, 51, 4, 380-385, 2004.

J34.   V. Giordano, J.G. Hartnett, J. Krupka, Y. Kersalé, P.Y. Bourgeois, M.E. Tobar, “Whispering gallery mode technique applied to the measurement of the dielectric properties of Langasite between 4 K and 300 K,” Trans on UFFC, 51, 5, 484-490, 2004

J35.   M.V. Jacob, J.G. Hartnett, J. Mazierska, V. Giordano, J. Krupka, M.E. Tobar, “Temperature dependence of permittivity and loss tangent of lithium tantalate at microwave frequencies,” Trans on MTT, 52, 2, 536–541, 2004.

J36.   M.E. Tobar, J-M. Le Floch, D. Cros, J. Krupka, J.D. Anstie, J.G. Hartnett, “Spherical Bragg reflector resonators,” Trans on UFFC, 51, 9, 1054-1059, 2004.

J37. K. Watabe, Y. Koga, S. Ohshima, T. Ikegami, J.G. Hartnett, “Cryogenic whispering gallery sapphire oscillator for microwave frequency standard applications,” IEICE Trans. Electron., Vol E87-C, 9, 1640-1642, 2004.

J38.   J.G. Hartnett, “Carmeli’s accelerating universe is spatially flat without dark matter,” Int. J. Theor. Phys., 44, 4, 485-492, 2005.

J39. M.E. Tobar, P. Wolf, A. Fowler, J.G. Hartnett, “New methods of testing Lorentz violation in electrodynamics,” Phys. Rev. D, 71, 025004, 2005.

J40.   J.G. Hartnett, “The Carmeli metric correctly describes spiral galaxy rotation curves,” Int. J. Theor. Phys., 44, 3, 349-362, 2005.

J41.   M.E. Tobar, J-M. le Floch, D. Cros, J.G. Hartnett, “Distributed Bragg reflector resonators with cylindrical symmetry and extremely high Q-factors,” IEEE Trans. on UFFC, 52, 1, 17-26, 2005.

J42. J.G. Hartnett, M.E. Tobar, P. Stanwix, T. Morikawa, D. Cros, O. Piquet, “Designs of a Microwave TE011 Mode Cavity for a Space Borne H-Maser,” IEEE Trans on UFFC, 52, 10, 1638-1643, 2005

J43. J. Krupka, M.E. Tobar,  J.G. Hartnett, D. Cros, J-M Le Floch, “Extremely High-Q Factor  Dielectric Resonators for Millimeter-Wave Applications” IEEE Trans on MTT, 53, 2, 702-712, 2005

J44.   N. Boubekeur, J.G. Hartnett, M.E. Tobar, N. Bazin, Y. Kersalé, V. Giordano, “Frequency stability of Ti3+ doped whispering gallery mode sapphire resonator oscillator at 34K” Electron. Letters, 41, 9, 534-535, 2005

J45.   K. Watabe, J.G. Hartnett, G. Santarelli, S. Yanagimachi, T. Ikegami, S. Ohshima, “Microwave local oscillator for a Cesium frequency standard synthesized from a Cryogenic Sapphire Oscillator,” Japanese J. Appl. Phys., 44, 5A, 3283-3286, 2005

J46.   P.L. Stanwix, M.E. Tobar, M. Susli, C.R. Locke, E.N. Ivanov, J. Winterflood, J.G. Hartnett, F. van Kann, “Rotating Michelson-Morley based dual cavity cryogenic sapphire oscillator,” in Annales  Françaises des microtechniques et de Chronométrie (AFMC), 54, 77-81, 2005

J47.   J.G. Hartnett, M.E. Tobar, E.N. Ivanov and J. Krupka, “Room temperature measurement of the anisotropic loss tangent of sapphire using the whispering-gallery-mode technique,” IEEE Trans on UFFC, 53, 1, 34-38, 2006

J48.   J.D. Anstie, J.G. Hartnett, M.E. Tobar, E.N. Ivanov, P. Stanwix,  “Second generation 50K dual-mode sapphire oscillator,” IEEE Trans on UFFC, 53, 2, 284-288, 2006.

J49.   J.A. Torrealba, M.E. Tobar, E.N. Ivanov, C.R. Locke, J-M. Le Floch, D. Cros, and J.G. Hartnett, “Room Temperature Dual-Mode Oscillator- First Results,” Electron. Letters, vol. 42, 2, 99-100, 2006

J50.   M. Carmeli, J.G. Hartnett, F.J. Oliveira, “The cosmic time in terms of the redshift,” Found. Phys. Lett., 19, 3, 277-283, 2006

J51.   J.G. Hartnett, “The distance modulus determined from Carmeli’s cosmology fits the accelerating universe data of the high-redshift type Ia supernovae without dark matter.” Found. Phys., 36, 6, 839-861, 2006

J52.   M. Carmeli, J.G. Hartnett, F.J. Oliveira, “On the anomalous acceleration of Pioneer spacecrafts,” Int. J. Theor. Phys., 45. 6, 1111-1115, 2006

J53.   J.G. Hartnett, “Spiral galaxy rotation curves determined from Carmelian General Relativity,” Int. J. Theor. Phys., 45, 11, 2147-2165, 2006.

J54.   J.G. Hartnett, M.E. Tobar, “Properties of gravitational waves in Cosmological general relativity,” Int. J. Theor. Phys., 45, 11, 2213-2222, 2006.

J55.   K. Watabe, J.G. Hartnett, C.R. Locke, G. Santarelli, S. Yanagimachi, T. Shimazaki, T. Ikegami, S. Ohshima, “Reference signal synthesized from a Cryogenic Sapphire Oscillator improved by power control servo,” Japanese J. Appl. Phys., 45, 4A, 2827-2829, 2006

J56.  F.J. Oliveira, J.G. Hartnett, “Carmeli’s cosmology fits data for an accelerating and decelerating universe without dark matter or dark energy,” Found. Phys. Lett., 19, 6, 519-535, 2006.

J57.   J-M. LeFloch, J.D. Anstie, M.E. Tobar, J.G. Hartnett, P-Y Bourgeois, D. Cros, “Whispering modes in anisotropic and isotropic dielectric spherical resonators,” Phys. Lett. A, 359, 1-7, 2006.

J58.   M.V. Jacob, J.G. Hartnett, J. Mazierska, J. Krupka, M.E. Tobar, “Dielectric Characterisation of Barium Fluoride at Cryogenic Temperatures using a TE011 and quasi TE0mn Mode Dielectric Resonators,” Cryogenics, 46, 730–735, 2006.

J59.   M.E. Tobar, E.N. Ivanov, C.R. Locke, P.L. Stanwix, J.G. Hartnett, A.N. Luiten, R.B. Warrington, P.T.H. Fisk, “Long term operation and performance of cryogenic sapphire oscillators,” IEEE Trans. on UFFC, 53, 12, 2386-2393, 2006.

J60.   J.G. Hartnett, C.R. Locke, E.N. Ivanov, M.E. Tobar, P.L. Stanwix, “Cryogenic sapphire oscillator with exceptionally high long-term frequency stability,” Appl. Phys. Lett., 89, 20 203513, 2006.

J61.   K. Watabe, J.G. Hartnett, C.R. Locke, G. Santarelli, S. Yanagimachi, T. Shimazaki, T. Ikegami and S. Ohshima, “Short term frequency stability tests of two cryogenic sapphire oscillators,” Jap. J. Appl. Phys., 45, 12, 9234–9237, 2006.

J62.   A.C. Fowler, M.E. Tobar, C.R. Locke, E.N. Ivanov, J.G. Hartnett, J.D. Anstie, D. Cros, “Exciting travelling waves in high Q structures using microstrip,” J. European Ceramic Society, 27, Issue: 8-9   Special Issue:  3023–3026, 2007.

J63.   J.G. Hartnett, J-M. Le Floch, M.E. Tobar, J. Krupka, P-Y. Bourgeois, “Anisotropic paramagnetic susceptibility of crystalline ruby at cryogenic temperatures,” Phys Rev B, 75, 3, 024415, 2007

J64.   K. Watabe, H. Inaba, K. Okumura, F. Hong, J.G. Hartnett, C.R. Locke, G. Santarelli, S. Yanagimachi, K. Minoshima, T. Ikegami, A. Onae, S. Ohshima and H. Matsumoto, “Optical frequency synthesis from a cryogenic sapphire oscillator using a fiber-based frequency comb,” CPEM Special Issue IEEE Trans on Instr. Meas., 56, 2, 632-636, 2007.

J65.   J.G. Hartnett, F.J. Oliveira, “Luminosity distance, angular size and surface brightness in Cosmological General Relativity,” Found. Phys., 37, 3, 446-454, 2007.

J66.   J.G. Hartnett, M.E. Tobar, J. Krupka, “Dependence of the dielectric permittivity of single-crystal quartz on thermal deformation at cryogenic temperatures,” J. Appl. Physics, 102, 7, 074103, 2007

J67.   K. Benmessai, P-Y. Bourgeois, Y. Kersale, N. Bazin, M.E. Tobar, J.G. Hartnett, M. Oxborrow, and V. Giordano, “Frequency instability measurement system of cryogenic maser oscillator,” Elect. Lett., 43, 25, 1436-1437, 2007

J68.   J.G. Hartnett, “Spheroidal and elliptical galaxy radial velocity dispersion determined from Cosmological General Relativity,” Int. J. Theor. Phys., 47, 5, 1252-1260, 2008.

J69.   J.G. Hartnett, “Extending the redshift-distance relation in Cosmological General Relativity to higher redshifts,” Found. Phys., 38, 3, 201-215, 2008.

J70.   C.R. Locke, E.N. Ivanov, J.G. Hartnett, P.L. Stanwix, M.E. Tobar, “Invited Article: Design techniques and noise properties of secondary frequency standards based on cryogenically cooled sapphire dielectric resonators,” Rev. Sci. Instruments, 79, 5, 051301, 2008

J71.   J. Krupka, D. Mouneyrac, J.G. Hartnett, M.E. Tobar, “Use of Whispering-Gallery Modes and Quasi-TE0np Modes for Broadband Characterization of Bulk Gallium Arsenide and Gallium Phosphide Samples,” IEEE Trans. on MTT, 56, 5, 1201-1206, 2008

J72.   K. Watabe, S. Yanagimachi, A. Takamizawa, T. Ikegami, S. Ohshima, G. Santarelli, C.R. Locke, J.G. Hartnett, “Cryogenic-sapphire-oscillator-based reference signal at 1 GHz with 10-15 level instability,” Jap. J. Appl. Physics, 47, 9, 7390–7392, 2008

J73.   J.G. Hartnett, D. Mouneyrac, J-M Le Floch, J. Krupka, M.E. Tobar, D. Cros, “Modified permittivity observed in bulk Gallium Arsenide and Gallium Phosphide samples at 50 K using the Whispering Gallery mode method,” Appl. Phys. Lett., 93, 062105, 2008

J74.   J.G. Hartnett, K. Hirano, “Galaxy redshift abundance periodicity from Fourier analysis of number counts N(z) using SDSS and 2dF GRS galaxy surveys,” Astrophysics and Space Science,  318, 1 & 2, 13-24, 2008.

J75.   J.G. Hartnett, “Electromagnetic waves in an expanding 5D universe,” New Advances in Physics, 2, 2, 115-123, 2008

J76.   J.G. Hartnett, D. Mouneyrac, J-M. Le Floch, J. Krupka, M.E. Tobar, D. Cros, “Observation of persistent photoconductivity in bulk Gallium Arsenide and Gallium Phosphide samples at cryogenic temperatures using the Whispering Gallery mode method,” J. Applied Phys., 104, 11, 113714, 2008

J77.   J.J. McFerran, J.G. Hartnett, A.N. Luiten, “An optical beam frequency reference with 10-14 range frequency instability,” Appl. Phys. Lett., 95, 3, 031103, 2009

J78.   J. Krupka, K. Derzakowski, J.G. Hartnett, “Measurements of the Complex Permittivity and the Complex Permeability of Low and Medium Loss Isotropic and Uniaxially Anisotropic Metamaterials at Microwave Frequencies,” Meas. Sci. Technol., 20, 105702, 2009.

J79.   J.G. Hartnett, “Unknown selection effect simulates redshift periodicity in quasar number counts from Sloan Digital Sky Survey,” Astrophysics & Space Science, 324, 1, 13-16, 2009

J80.   M.E. Tobar, E.N. Ivanov, P.L. Stanwix, J-M.G. le Floch, J.G. Hartnett, “Rotating odd-parity Lorentz invariance test in electrodynamics,” Phys. Rev. D, 80, 125024, 2009.

J81.   D. L. Creedon, K. Benmessai, M.E. Tobar, J.G. Hartnett, P-Y. Bourgeois, Y. Kersale, J-M. Le Floch and V. Giordano, “High Power Solid-State Sapphire Whispering Gallery Mode Maser,” IEEE Trans on UFFC, 57, 3, 641-646, 2010

J82.   C. Wang, J.G. Hartnett, “A Vibration Free Cryostat Using Pulse Tube Cryocooler,” Cryogenics, 50, 336-341, 2010

J83.   J.G. Hartnett, N.R. Nand, C. Wang, J-M. Le Floch, “Cryogenic Sapphire Oscillator using a low-vibration design pulse-tube cryocooler: First results,” IEEE Trans on UFFC, 57, 5, 1034-1038, 2010

J84.   J. Krupka,W. Gwarek and J.G. Hartnett, “Experimental Studies of Planar Metamaterials With A Tunable Cylindrical TE01n Mode Cavity,” J. Appl. Physics, 107, 124101, 2010

J85.   J. Krupka, W. Gwarek, N. Kwietniewski, J.G. Hartnett, “Measurements of Planar Metal-Dielectric Structures using Split-Post Dielectric Resonators,” IEEE Trans on MTT, 58, 12, 3511-3518, 2010

J86. J.G. Hartnett, N.R. Nand, “Ultra-low vibration pulse-tube cryocooler stabilized cryogenic sapphire oscillator with 10-16 fractional frequency stability,” IEEE Trans on MTT, 58, 12, 3580-3586, 2010

J87.   R. Povey, J.G. Hartnett, M.E. Tobar, “Microwave cavity light shining through a wall optimization and experiment,” Phys. Rev. D, 82, 052003, 2010

J88.   D. Mouneyrac, J.G. Hartnett, J-M. Le Floch, M.E. Tobar, D. Cros, J. Krupka, “Detrapping and retrapping of free carriers in nominally pure single crystal GaP, GaAs and 4H-SiC semiconductors under light illumination at cryogenic temperatures,” J. Applied Phys., 108, 104107, 2010

J89.   J.G. Hartnett and A.N. Luiten, “Colloquium: Comparison of astrophysical and terrestrial frequency standards,” Rev. Mod. Phys., 83, 1-9, 2011

J90.   J.G. Hartnett, D. Mouneyrac, J. Krupka, J-M. le Floch, M.E. Tobar and D. Cros, “Microwave Properties of Semi-Insulating Silicon Carbide between 10 and 40 GHz and at Cryogenic Temperatures,” J. Appl. Phys, 109, 064107, 2011

J91.   J. Krupka, J.G. Hartnett, Mirosław Piersa, “Permittivity and microwave absorption of semi-insulating InP at microwave frequencies,” Appl. Phys. Lett., 89, 112112, 2011

J92.   D.L. Creedon, M.E. Tobar, E.N. Ivanov, J.G. Hartnett, “High resolution flicker noise-free frequency measurements of very weak microwave signals,” IEEE Trans on MTT, 59, 6, 1651 – 1657, 2011

J93.   J.G. Hartnett, J. Jaeckel, R.G. Povey, M.E. Tobar, “Resonant Regeneration in the Sub-Quantum Regime — A demonstration of fractional quantum interference,” Phys. Lett. B., 698, 5, 346-352, 2011

J94.   S. Doeleman, Tao Mai, A.E.E. Rogers, J.G. Hartnett, M.E. Tobar, N. Nand, “Adapting a cryogenic sapphire oscillator for very long baseline interferometry,”  Publications of the Astronomical Society of the Pacific, 123, 582-595, 2011

J95.   J.-M. le Floch, R. Bara, J. G. Hartnett, M. E. Tobar, D. Mouneyrac, D. Passerieux, D. Cros, J. Krupka, P. Goy, and S. Caroopen, “Electromagnetic properties of polycrystalline diamond from 35 K to room temperature and microwave to terahertz frequencies,” J. Appl. Phys, 109, 094103, 2011

J96.   J-M Le Floch, M.E. Tobar, G. Humbert, D. Mouneyrac, D. Férachou, R. Bara, M. Aubourg, J.G. Hartnett, D. Cros, J-M Blondy, J. Krupka, “Low-Loss Dielectric Material Characterization and High-Q Resonator Design from Microwave to Millimetre Waves Frequencies,” J. of Physical Science and Application, 1, 15-28, 2011

J97.   N.R. Nand, J.G. Hartnett, E.N. Ivanov, G. Santarelli, “Ultra-stable very-low-phase-noise signal source for Very Long Baseline Interferometry using a cryocooled sapphire oscillator,” IEEE Trans on MTT, 59, 11, 2978 – 2986, 2011

J98.   R. Povey, J.G. Hartnett, M.E. Tobar, “Microwave cavity hidden sector photon threshold crossing,” Phys. Rev. D, 84, 055023, 2011

J99.   J. Krupka, J. Parka, P.Łoś, J.G. Hartnett, and K. Naguszewska, “Silver-Gelatine Metal-Dielectric Composites Made from Developed X-Ray Films”, IEEE Antennas and Wireless Prop. Lett., 10, 1602-1604, 2011

J100. R. Bara, J.-M. Le Floch, M.E. Tobar, P.L. Stanwix, S. Parker, J.G. Hartnett, E.N. Ivanov, “Generation of 103.75 GHz CW source with 5.10-16 frequency instability using cryogenic sapphire oscillators,” IEEE Micro. Wireless Comp. Lett., 22, 2, 85-87, 2012

J101. J.G. Hartnett, N.R. Nand and C. Lu, “Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators,” Appl. Phys. Lett., 100, 183501, 2012

J102. M. Rioja, R. Dodson, Y. Asaki, J. Hartnett, S. Tingay, “The Impact of Frequency Standards on Coherence in VLBI at the Highest Frequencies,” AJ, 144, 121-131, 2012.

J103. E. Ivanov, J. Bourhill, D. Creedon, J. Hartnett, and M. Tobar, “Fast light” effect in experiments with cryogenic resonators, J. Phys. B: At. Mol. Opt. Phys. 45, 221001, 2012.

J104. J.G. Hartnett, M.E. Tobar, E.N. Ivanov, A.N. Luiten, Optimum Design of a High-Q Room-Temperature Whispering-Gallery-Mode X-band Sapphire Resonator, IEEE Trans on UFFC, 60 (6): 1041-1047, 2013

J105. J.G. Hartnett, S.R. Parker, E.N. Ivanov, Frequency transposing measurement technique for oscillator comparisons, Electronics Letters, 49(15): 947–949, July 2013

J106. N.R. Nand, S.R. Parker, E.N. Ivanov, J-M. le Floch, J.G. Hartnett, and M.E. Tobar, Resonator power to frequency conversion in a cryogenic sapphire oscillator, Appl. Phys. Lett. 103 (4): 043502, 2013

J107. J.G. Hartnett, A valid finite bounded expanding Carmelian universe without dark matter, Int. J. Theoretical Physics, 52 (12): 4360-4366, 2013.

J108. Lachlan J. Gunn, Peter G. Catlow, Waddah A. Al-Ashwal, John G. Hartnett, Andrew Allison, and Derek Abbott, Simplified Three-Cornered Hat Technique for Frequency Stability Measurements, IEEE Trans on Instru. & Meas., 63(4): 889-895, 2014

J109. S.R. Parker, J.G. Hartnett, R.G. Povey and M.E. Tobar, Cryogenic resonant microwave cavity searches for hidden sector photons, Phys. Rev. D., 88, 112004, 2013

J110 S.R. Parker,E.N. Ivanov and J.G. Hartnett, Extending the frequency range of digital noise measurements to the microwave domain, IEEE Trans on MTT, 62(2): 368-372, 2013

J111  J.G. Hartnett, S.R. Parker, E.N. Ivanov, T. Povey, N.R. Nand and J.-M. le Floch, Radio frequency signals synthesized from independent cryogenic sapphire oscillators, Electronics Letters 50(4): 294-295, 2014

J112 Jean-Michel Le Floch, Y. Fan, Georges Humbert, Qingxiao Shan, Denis Férachou, Romain Bara-Maillet, Michel Aubourg, John G. Hartnett, Valerie Madrangeas, Dominique Cros, Jean-Marc Blondy, Jerzy Krupka, Michael E. Tobar, Invited Article: Dielectric material characterization techniques and designs of high-Q resonators for applications from micro to millimeter-waves frequencies applicable at room and cryogenic temperatures, Rev. Sci. Instru., 85(3): 043403RSI, 2014

J113  A. Takamizawa, S. Yanagimachi, T. Tanabe, K. Hagimoto, I. Hirano, K. Watabe, T. Ikegami, J.G. Hartnett, Atomic Fountain Clock with Very-High Frequency Stability Employing a Pulse-Tube-Cryocooled Sapphire Oscillator, IEEE Trans on UFFC, 61(9): 1463-1469, 2014

J114. A. Takamizawa, S. Yanagimachi, T. Tanabe, K. Hagimoto, I. Hirano, K. Watabe, T. Ikegami, J.G. Hartnett, Preliminary Evaluation of the Cesium Fountain Primary Frequency Standard NMIJ-F2, IEEE Trans on Instrumentation & Measurement, 64(9): 2504-2512, 2015.

J115. Moritz Nagel, Stephen R. Parker, Evgeny V. Kovalchuck, Paul L. Stanwix, John G. Hartnett, Eugene N. Ivanov, Achim Peters, and Michael E. Tobar, Direct Terrestrial Test of Lorentz Symmetry in Electrodynamics to 10-18, Nature Communications, 6, Article number: 8174, 1 September 2015.

J116. P.S Light, A.P. Hilton, R.T. White, C. Perrella, J.D. Anstie, J.G. Hartnett, G. Santarelli, and A. Luiten, Bidirectional Microwave and Optical Signal Dissemination, Optics Letters, 41(5): 2016.

J117. J.M. Chappell, A. Iqbal, J.G. Hartnett, D. Abbott, The vector algebra war: a historical perspective. IEEE Access 4:1997-2004, 2016. doi:10.1109/ACCESS.2016.2538262.

REFEREED CONFERENCE PUBLICATIONS

RC1.    J.G. Hartnett, “Electromagnetic Energy Dispersion in a 5D Universe,” invited, Proc. Frontiers of Fundamental and Computational Physics: 10th International Symposium, Editors J.G. Hartnett, P.C. Abbott, AIP Conference Proceedings, 1246, pp. 28-35, 2010.

RC2.    C. Fulton, H. Arp and J.G. Hartnett, “Analyses of the 2dF Deep Field,” Proc. Frontiers of Fundamental and Computational Physics: 10th International Symposium, Editors J.G. Hartnett, P.C. Abbott, AIP Conference Proceedings, 1246, pp. 131-135, 2010.

RC3.    R. Povey, J.G. Hartnett and M.E. Tobar, “Microwave Cavity Search for Paraphotons,” Proc. Frontiers of Fundamental and Computational Physics: 10th International Symposium, Editors J.G. Hartnett, P.C. Abbott, AIP Conference Proceedings, 1246, pp. 149-153, 2010.

RC4. T. Ikegami, K.I. Watabe, S. Yanagimachi, A. Takamizawa, J.G. Hartnett, Autonomous cryogenic sapphire oscillators employing low vibration pulse-tube cryocoolers at NMIJ, Journal of Physics: Conference Series. 723: 012032-012032. 04 Jul 2016.

NON-REFEREED CONFERENCE PUBLICATIONS

C1.    M.E. Tobar, J. Krupka, J.G. Hartnett, E.N. Ivanov, R.A. Woode, “Sapphire-rutile frequency-temperature compensated whispering gallery microwave resonators.” Proc. 1997 Int. Freq. Contr. Symp., pp 1000-1008.

C2.    M.E. Tobar, J.G. Hartnett, J. Krupka, A.G. Mann, E.N. Ivanov, “New frequency-temperature compensation techniques for high-Q sapphire resonators,” Proc. 12th European Frequency and Time Forum, Warsaw, Poland, 1998, pp 103-107

C3.    R. Ratheesh, M.T. Sebastian, M.E. Tobar, J.G. Hartnett, D.G. Blair, “Microwave characterisation of Ba(Mg1/3,Ta2/3)O3 dielectric ceramics using Whispering Gallery Mode method,” Proc. 12th European Frequency and Time Forum, Warsaw, Poland, 1998.

C4.    M.E. Tobar, J.G. Hartnett, J. Krupka, A.G. Mann, E.N. Ivanov, R.G. Geyer, “Measurements of doped and composite low loss single crystal dielectric resonators for secondary frequency standards,” invited paper abstract published in Proc. 1998 PIERS, Nantes France, 1998.

C5.    R. Ratheesh, H. Sreemoolanadhan, M.T.Sebastian, M.E.Tobar, J.G. Hartnett, D.G.Blair, “Whispering Gallery mode microwave characterisation of Ba2Nd4Ti5O18 dielectric resonators,” Advances in Microwaves and Lightwaves, Editor E.K. Sharma, Allied Publishers, New Delhi, pp 8-11, 1998.

C6.    J.G. Hartnett, M.E. Tobar, A.G. Mann, E.N. Ivanov, J. Krupka, “Frequency-temperature compensation in Ti3+ and Ti4+ doped sapphire whispering gallery mode resonators,” Proc. Int. Freq. Contr. Symp, pp 512-517, 1998.

C7.    J.G. Hartnett, M.E. Tobar, A.G. Mann, Eugene N. Ivanov, J. Krupka, “Paramagnetic temperature compensation of modal Frequencies in Ti3+ and Ti4+ doped Sapphire Resonators,” Abstract published in Proc. 13th National Congress of the Australian Institute of Physics, Fremantle, W.  Australia, p 205, 1998.

C8.    J.G. Hartnett, M.E. Tobar, E.N. Ivanov, A.G. Mann, J. Krupka, S.N. Jacobsen, L. Madsen, U. Helmersson, “Electromagnetic frequency-temperature compensation techniques for high-Q sapphire resonators,” Proc. Asia-Pacific Microwave Conference, Yokohama, Japan, pp. 1367-1370, 1998

C9.    M.E. Tobar, D. Cros, P. Blondy, J.G. Hartnett, P. Guillon, “Finite element realization of ultra-high quality factor frequency-temperature compensated sapphire-rutile whispering Gallery mode resonators,” Int. Microwave Symp. Dig., vol. 2, pp. 1323-1326, 1999

C10.    M.E. Tobar, J. Krupka, J.G. Hartnett, R.G. Geyer, E.N. Ivanov, “Measurements of low-loss crystalline materials for high-Q temperature stable resonator applications,” Proc. Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Besançon, France, pp 573-576, 1999.

C11.    J.G. Hartnett, E.N. Ivanov, M.E. Tobar, “A study of the frequency stability limits of oscillators based on sapphire dielectric resonators,” Proc. Joint Meeting , European Frequency & Time Forum – IEEE International Frequency Control Symposium, Besançon, France, pp 1150–1153, 1999.

C12.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, “Sapphire-rutile secondary frequency standard,” Invited paper, in Proc. of the 26th URSI General Assembly, p. 16., 1999.

C13.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Blondy, P. Guillon, “Novel design of high-Q whispering gallery sapphire-rutile dielectric resonators for a secondary frequency standard,” Proc. European Frequency & Time Forum, Torino, Italy, pp. 93-97, March 2000.

C14.    J.G. Hartnett, M.E. Tobar, E.N. Ivanov, ”A novel ‘bi-directional’ interferometric discriminator for low noise microwave applications,” Proc. European Frequency & Time Forum, Torino, Italy, pp. 129-132, March 2000

C15.    J.G. Hartnett, M.E. Tobar, E.N. Ivanov, “A bi-directional interferometric frequency discriminator for low noise microwave applications,” Proc. Conference on Precision Electromagnetic Measurement, Sydney, pp. 48-49, May 2000

C16.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Blondy “Whispering gallery method of measuring complex permittivity in highly anisotropic materials,” Proc. Conference on Precision Electromagnetic Measurement, Sydney, pp. 459-460, May 2000.

C17.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Blondy, P. Guillon, “Analysis of rutile-ring method of frequency temperature compensating a high-Q whispering gallery sapphire resonator,” Proc. Int. Freq. Contr. Symp, Kansas City, Missouri, pp. 485-492, June 2000.

C18.    D. Cros, M.E. Tobar, G. Duchiron, P. Blondy, P. Guillon, J.G. Hartnett, “Design rules for dielectric temperature compensated resonators,” Proc. 30th EuMC, pp. 263-265, Oct 2000.

C19.    J.G. Hartnett, P. Bilski, M.E. Tobar, E.N. Ivanov, “Temperature Stabilization of a Solid-Nitrogen-Cooled Secondary Frequency Standard,” in proc. European Frequency and Time Forum, Neuchatel, Switzerland, 2001.

C20. M.E. Tobar, E.N. Ivanov, J.G. Hartnett, “Novel Temperature Control of a Sapphire Loaded Cavity Oscillator from the Difference Frequency of WGE and WGH Modes,” Proc. Int. Freq. Contr. Symp, Seattle, Washington, pp. 699-702, June 2001.

C21. M.E. Tobar, J.G. Hartnett, E.N. Ivanov, D. Cros, “Design of a Cryogenic Dual-Mode Resonator for a Fly-Wheel Oscillator for a Cesium Frequency Standard,” Proc. Int. Freq. Contr. Symp, Seattle, Washington, pp. 715-719, June 2001.

C22.    M.E. Tobar, E.N. Ivanov, J.G. Hartnett, D. Cros, “High-Q frequency stable dual-mode whispering gallery sapphire resonator,” in proc. IEEE Int. Microwave Symp. Digest, pp. 205-208, 2001.

C23.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, C.R. Locke, A.N. Luiten, Ch. Salomon, N. Dimarcq, M Abgrall, A. Clairon, P. Laurent, P. Lemonde, G. Santarelli, P. Uhrich, L.G. Bernier, G. Busca, A. Jornod, P. Thomann, E. Samain, P. Wolf, F. Gonzalez, Ph. Guillemot, S. Leon, F Nouel, Ch Sirmain, S Feltham, “The atomic clock ensemble in space mission on board the international space station: description of the project and Australian participation,” published in Proc. 2001 National Space Science Workshop, Sydney Australia.

C24.    J.G. Hartnett, M.E. Tobar, E.N. Ivanov, “High resolution room-temperature determination of the loss tangent of sapphire using the whispering-gallery-mode method,” abstract in Proc. 2001 Asia-Pacific Radio Science Conference, Tokyo Japan.

C25.    M.E. Tobar, J.G. Hartnett, J. Anstie, “New Michelson Morley experiment based on high-Q spherical resonators,” Proc. 6th Symposium on Frequency Standards and Metrology, World Scientific, St. Andrews, Scotland, pp 261-269, 2001

C26.    J.G. Hartnett, M.E. Tobar, E.N. Ivanov, C.R. Locke, “Current status of cryogenic (50 K – 80 K) secondary frequency standards for flywheels of atomic fountain clocks,” Proc. 6th Symposium on Frequency Standards and Metrology, World Scientific, St. Andrews, Scotland, pp 313-320, 2001

C27.    V. Giordano, J.G. Hartnett, J. Krupka, Y. Kersalé, P.Y. Bourgeois, M.E. Tobar, “Dielectric properties of Langasite measured with the whispering gallery mode technique,” in Proc. EFTF, Leningrad Russia, 2002.

C28. J.G. Hartnett, A.N. Luiten, J. Krupka, M.E. Tobar, P. Bilski, “Microwave properties of ultra-low loss chromium-doped YAG,” in Proc. of 2002 Workshop on the Application of Radio Science, Feb 2002, Sydney, Australia.

C29.    M.E. Tobar, J.D. Anstie, J.G. Hartnett, “Michelson Morley Experiment using Spherical Resonators,” in Proc. of 2002 Workshop on the Application of Radio Science, Feb 2002, Sydney, Australia.

C30.    M.E. Tobar, J.G. Hartnett, E.N. Ivanov, C.R. Locke, AN. Luiten, Ch. Salomon, N. Dimarcq, M. Abgrall, A.Clairon, P. Laurent, P. Lemonde, G. Santarelli, P. Uhrich, L.G. Bernier, G. Busca, A. Jornod, P. Thomann, E. Samain, P.Wolf, F. Gonzalez, Ph Guillemot, S. Leon, F. Nouel, Ch Sirmain, S. Feltham, “Microwave Frequency Standards: Tools for Testing the Foundations of Physics in the Laboratory and on Board the International Space Station,” Invited paper in the Proc. of 2002 Workshop on the Application of Radio Science, Feb 2002, Sydney, Australia.

C31.    J.G. Hartnett, M.E. Tobar, D. Cros, J. Krupka, P. Guillon, “Exceptionally-enhanced Q-factor sapphire-loaded-cavity TE01 mode resonators,” in Proc. 2002 IEEE International Frequency Control Symposium, pp. 559 –564, 2002

C32.    M.E. Tobar, G.L. Hamilton E.N Ivanov, J.G. Hartnett, C.R. Locke, “Temperature compensation of the difference frequency between modes of orthogonal polarization in anisotropic dielectric resonators,” in Proc. 2002 IEEE International Frequency Control Symposium, pp. 553 –558, 2002

C33.    M.E. Tobar, J.D. Anstie, J.G. Hartnett, “High-Q whispering modes in spherical cavity resonators,” in Proc. 2002 IEEE International Frequency Control Symposium, pp. 548 –552, 2002

C34. C.R. Locke, M.E.Tobar, G.L. Hamilton, E.N. Ivanov, J.G. Hartnett, “Improving the frequency stability of microwave oscillators by utilizing the temperature compensated difference frequency of a dual mode sapphire loaded cavity resonator,” in the Proc. of the 27th Triennial General Assembly of the International Union of Radio Science, Maastricht, The Netherlands, August, 2002.

C35. M.E. Tobar, J.G. Hartnett, J.D. Anstie, “New ultra-sensitive Michelson-Morley experiment,” in Proc. IEEE Conf. on Precision Electromagnetic Measurement, Ottawa, pp. 94-95, June 2002.

C36. M.E. Tobar, J.G. Hartnett, “Test for the time independence of the Fine Structure Constant,using cryogenic sapphire resonators at microwave frequencies,” in Proc. IEEE Conf. on Precision Electromagnetic Measurement, Ottawa, pp. 320, June 2002.

C37. C.R. Locke, M.E. Tobar, E.N. Ivanov, J.G. Hartnett, O Piquet, D Cros, “Measurements of a High-Q TE0,1, frequency-temperature compensated sapphire Bragg distributed resonator,” in Proc. IEEE Conf. on Precision Electromagnetic Measurement, Ottawa, pp. 582-583, June 2002.

C38.     J.G. Hartnett, J.D. Anstie, M.E. Tobar, E.N. Ivanov, “The progress in the development of a solid nitrogen cooled dual-mode frequency-temperature-compensated sapphire-resonator oscillator,” in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 376-379, May, 2003

C39. O. Piquet, D. Cros, S. Verdeyme, M.E. Tobar, J.G. Hartnett, P.Y. Bourgeois, Y. Kersalé, V. Giordano, M. Chaubet, “Realization of high-Q frequency-temperature compensated resonator with spurious mode free region,” in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 748-751, May, 2003

C40. M.E. Tobar , G.L. Hamilton, J.G. Hartnett, E.N. Ivanov, D. Cros, P. Guillon, “Accurate characterization of the temperature coefficient of permittivity of sapphire utilizing the dual-mode frequency locked technique,”  in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 365-370, May, 2003

C41. J.G. Hartnett, A. Fowler, M. E. Tobar, J. Krupka, “Dielectric properties of single crystal fluorides at microwave frequencies and cryogenic temperatures,” in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 391-394, May, 2003

C42. J.D. Anstie, M.E. Tobar, J.G. Hartnett, D. Cros, J. Krupka, P. Guillon, “The study of whispering gallery modes in anisotropic and isotropic dielectric spherical resonators,”  in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 380-383, May, 2003

C43. M.E. Tobar, J.G. Hartnett, “The dependence of phonon and paramagnetic resonances on the fine structure constant in sapphire and the possibility of a test of time dependence,” in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 211-216a, May, 2003

C44. J. Krupka, J. Mazierska, M. Jacob, J. Hartnett and M. Tobar: “Recent Advances in Measurements of Permittivity and Dielectric Losses at Microwave Frequencies,” Invited Paper, SPIE Proceedings of the 9th ISMOT Conf., in Microwave and Optical Technology, Vol. 5445, pp. 311-317, 2003

C44. K. Watabe, Y. Koga, S. Ohshima, T. Ikegami, J.G. Hartnett, “Cryogenic whispering gallery sapphire oscillator using 4 K pulse-tube cryocooler,” in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 388-390, May, 2003

C45. P.Y. Bourgeois, Y. Kersalé , N. Bazin, J.G. Hartnett, M. Chaubet, and V. Giordano,  “Progress in the building of sapphire-helium clock at LPMO,” in Proc.of Joint Meeting European Frequency & Time Forum – IEEE International Frequency Control Symposium, Tampa, Florida, pp. 355-359, May, 2003

C46. M.V. Jacob, J.G. Hartnett, J. Mazeirska, J. Krupka, M.E. Tobar, “Lithium Tantalate – A High Permittivity Dielectric Material for Microwave Communication Systems,” in Proc.of IEEE Conf. on Convergent Technologies for the Asia-Pacific Region, Bangalore, India, pp. 1362-1366, October, 2003

C47.    J.G. Hartnett, “Carmeli’s cosmology: The universe is spatially flat without dark matter,” published by Springer-Verlag in the Proceedings of the 6th Symposium on the Frontiers of Fundamental Physics, Udine, Italy, pp. 21-28, 2004.

C48.    P.L Stanwix, M.E. Tobar, J. Winterflood, E.N. Ivanov, M. Susli, J.G. Hartnett, F. van Kann, P. Wolf,  “Rotating Michelson-Morley experiment based on a dual cavity cryogenic sapphire oscillator” Frequency Control Symposium and Exposition, 2004. Proceedings of the 2004 IEEE International 23-27 Aug. 2004 pp.757 – 761

C49.    J.G. Hartnett, M.E. Tobar, P. Stanwix, T. Morikawa, D. Cros, O. Piquet, “Cavity designs for a space hydrogen maser,” Frequency Control Symposium and Exposition, 2004. Proceedings of the 2004 IEEE International 23-27 Aug. 2004 pp.608 – 612

C50.     J.D. Anstie, J.G. Hartnett, M.E. Tobar, E.N. Ivanov, P.L. Stanwix, “Evolution of the UWA solid nitrogen dual mode sapphire oscillator, JULIA,” Frequency Control Symposium and Exposition, 2004. Proceedings of the 2004 IEEE International 23-27 Aug. 2004 pp.386 – 389

C51. M.E. Tobar, J.G. Hartnett, J-M. le Floch, D. Cros, “Cylindrical distributed Bragg reflector resonators with extremely high Q-factors,” Frequency Control Symposium and Exposition, 2004. Proceedings of the 2004 IEEE International 23-27 Aug. 2004 pp.257 – 265

C52.     K. Watabe, J.G. Hartnett, T. Ikegame, S. Ohshima, “Development of cryogenic sapphire oscillator at NMIJ/AIST,” in Proc of IEEE Conf. on Precision Electromagnetic Measurement, London, pp.133-134, 2005

C53.     P.L. Stanwix, M.E. Tobar, M. Susli, C.R. Locke, E.N. Ivanov, J. Winterflood, J.G. Hartnett, F. van Kann, “Rotating Michelson-Morley based dual cavity cryogenic sapphire oscillator,” in Proc.of the Meeting European Frequency & Time Forum, Besançon, France, March, 2005

C54.     J.G. Hartnett, “The distance modulus determined from Carmeli’s cosmology fits the accelerating universe data of the high-redshift type Ia supernovae without dark matter,” abstract published in the Proceedings of the Australian Institute of Physics Congress, Canberra, Jan 2005. paper available at  http://arxiv.org/abs/astro-ph/0501526 March 2005.

C55.    A.C. Fowler, M.E. Tobar, C.R. Locke, E.N. Ivanov, J.G. Hartnett, J. Anstie, D. Cros, “Exciting traveling waves in high Q structures using microstrip,”  Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International Aug. 29-31, 2005 pp. 512 – 516

C56.    J.A. Torrealba, M.E. Tobar, E.N. Ivanov, C.R. Locke, J.G. Hartnett, J-M. Le Floch, D. Cros, “Room temperature dual-mode oscillator – first results,” Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International Aug. 29-31, 2005 pp. 373 – 376

C57.    Y. Kersale, N. Boubekeur, J.G. Hartnett, M.E. Tobar, N. Bazin, V. Giordano, “Titanium doped cryogenic sapphire resonator oscillators,” Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International Aug. 29-31, 2005 pp.368-372

C58.    M.E. Tobar, E.N. Ivanov, C.R. Locke, P.L. Stanwix, J.G. Hartnett, A.N. Luiten, R.B. Warrington, P.T.H. Fisk, M.A. Lawn, M.J. Wouters, S. Bize, G. Santarelli, P. Wolf, A. Clairon, P. Guillemot, “Long term operation, performance and applications of cryogenic sapphire oscillators,” Frequency Control Symposium and Exposition, 2005. Proceedings of the 2005 IEEE International Aug. 29-31, 2005 pp.350-354

C59. K. Watabe, J.G. Hartnett, C.R. Locke, G. Santarelli, S. Yanagimachi1, T. Ikegame, S. Ohshima, “Progress in the development of cryogenic sapphire resonator oscillator at NMIJ/AIST,” in Proc.of the European Frequency & Time Forum, 2006

C60. K. Watabe, H. Inaba, F. Hong, J. G. Hartnett, C. R. Locke, G. Santarelli, S. Yanagimachi, T. Shimazaki, T. Ikegami, A. Onae, S. Ohshima, and H. Matsumoto, “Up-conversion to optical frequency from a Cryogenic Sapphire Oscillator using an optical frequency comb,” in Proc of IEEE Conf. on Precision Electromagnetic Measurement, Torino, Italy, 2006

C61. J.G. Hartnett, M.E. Tobar, E.N. Ivanov, J.D. Anstie, C.R. Locke, A.N. Luiten, J.J. McFerran, R.B. Warrington, M.J. Wouters, P.T.H. Fisk, D. Chambon, G. Santarelli, “GPS Carrier Phase and TWSTFT comparisons of clock ensembles based at UWA and NMI,”  Proc. Workshop on the Application of Radio Science, Leura, NSW, p. 24, Feb. 2006

C62.    J.G. Hartnett, “Spiral galaxy rotation curves described using cosmological general relativity,” in the Proceedings of the 8th Symposium on the Frontiers of Fundamental Physics, Madrid, Spain, AIP Conf. Proc. 905, 27-29, 2007.

C63.    J.G. Hartnett, M.E. Tobar, “Gravitational waves in Cosmological General Relativity,” in the Proceedings of the 8th Symposium on the Frontiers of Fundamental Physics, Madrid, Spain, AIP Conf. Proc. 905, 30-32, 2007.

C64.    M.E. Tobar, P.L. Stanwix, A.C. Fowler, E.N. Ivanov, J.G. Hartnett, C.R. Locke, P. Wolf, “Using Precision Oscillators and Interferometers to Test Fundamental Physics,” International Frequency Control Symposium, IEEE, June, p. 681 – 684, 2006

C65.    M.E. Tobar,  P.L. Stanwix, E.N. Ivanov, A.C. Fowler, J.G. Hartnett, J.M. le Floch, M. Miao, P. Wolf, ‘Precision Microwave Oscillators and Interferometers to Test Lorentz Invariance in Electrodynamics’, XLIInd Recontres de Moriand: Gravitational Waves and Experimental Gravity, Vietnam, 1, pp. 227-234. 2007.

C66.     P.-Y. Bourgeois, K. Benmessai, M. Oxborrow, M.E. Tobar, N. Bazin, J. G. Hartnett, Y. Kersale, V. Giordano, “The Fe3+:Al2O3 Whispering Gallery mode maser oscillator,” Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International, May 29 2007-June 1, pp.1032 – 1040, 2007

C67.    M.E. Tobar, P.L. Stanwix, E.N. Ivanov, A.C. Fowler, J.G. Hartnett, J-M  le Floch, M.M. Miao, P. Wolf, “Precision Microwave Oscillators and Interferometers to Test Lorentz Invariance in Electrodynamics (an Update),” Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International, May 29 2007-June 1, pp.350 – 354, 2007

C68.    J.G. Hartnett, J-M Le Floch, M.E. Tobar, J. Krupka, P-Y Bourgeois, “Anisotropic paramagnetic susceptibility of crystalline ruby at cryogenic temperatures,” Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International
May 29 2007-June 1 pp. 666 – 671, 2007

C69.    J.G. Hartnett, C.R. Locke, E.N. Ivanov, M.E. Tobar, P.L. Stanwix, “Cryogenic sapphire oscillator with exceptionally high long-term frequency stability,” Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum. IEEE International
May 29 2007-June 1, pp.1028 – 1031, 2007

C70. J.G. Hartnett, “The redshift-distance relation extended to higher redshifts in Cosmological General Relativity,” in the Proceedings of the 9th Symposium on the Frontiers of Fundamental Physics, Udine, Italy, AIP Conf. Proc. 1018, pp. 57-66, 2008.

C71. M.E. Tobar, E.N. Ivanov, P.L. Stanwix, J-M. le Floch, J.G. Hartnett, “Continuous operation of an odd parity Lorentz Invariance test in electrodynamics using a microwave interferometer,” in Proc. of the 2008 IEEE International Frequency Control Symposium, pp. 729 – 732, 2008.

C72. M. Kumagai, H. Ito, M. Hosokawa, G. Santarelli, C.R. Locke, J.G. Hartnett, “Development of synthesis chains based on a cryogenic sapphire oscillator,” in Proc. of the 2008 IEEE International Frequency Control Symposium, pp. 576 – 580, 2008.

C73.    K. Benmessai, N. Bazin, P-Y. Bourgeois, Y. Kersale, V. Giordano, M.E. Tobar, J.G. Hartnett, G. Marra, M. Oxborrow, “Solution looking for a problem: The Fe3+:sapphire whispering-gallery-mode 12.04 GHz maser oscillator, an X-band microwave source of extremely low phase noise,” Meeting of the ARMMS RF and Microwave Society, 7th & 8th April 2008 at Milton Hill House, Steventon, Oxfordshire, United Kingdom, 2008

C74. J.G. Hartnett, E.N. Ivanov, M.E. Tobar, “Cryogenic Sapphire Oscillators (Invited),” invited paper in the Proceedings of the 7th International Symposium on Frequency Standards and Metrology, Pacific Grove, California, USA, pp. 384-392, 2009.

C75. K. Benmessai, P.Y. Bourgeois, N. Bazin, Y. Kersalé, V. Giordano, M. Oxborrow, D.L. Creedon, J.G. Hartnett, and M.E. Tobar, “New results for whispering gallery mode cryogenic sapphire maser oscillators,” in the Proceedings of the 7th International Symposium on Frequency Standards and Metrology, Pacific Grove, California, USA, pp. 398-402, 2009.

C76.    J.G. Hartnett, D.L. Creedon, D. Chambon, G. Santarelli, “Stability measurements of frequency synthesis with cryogenic sapphire oscillators,” in the Proceedings of the Intl Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. pp. 372 – 375, 2009.

C77.    D.L.  Creedon, K. Benmessai, M.E. Tobar, J.G. Hartnett, P-Y Bourgeois, Y. Kersale, J-M. Le Floch, V. Giordano, “High power solid-state sapphire Whispering Gallery mode maser,” in the Proceedings of the Intl Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. pp. 282 – 285, 2009.

C78.    D. Mouneyrac, J.G. Hartnett, J-M. Le Floch, M.E. Tobar, J. Krupka, D. Cros, “Observation of persistent photoconductivity and modified permittivity in bulk gallium arsenide and gallium phosphide samples at cryogenic temperatures,” in the Proceedings of the Intl Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum. pp. 886 – 889, 2009.

C79.    M. Kumagai, H. Ito, S. Nagano, M. Hosokawa, G. Santarelli, C.R. Locke, J.G. Hartnett, “Synthesis chains based on ultra-stable cryogenic sapphire oscillator at NICT,” in the Proceedings of the Intl Frequency Control Symposium, 2009 Joint with the 22nd European Frequency and Time forum, pp. 496 – 500, 2009.

C80.     J.G. Hartnett, “Fourier analysis of the large scale spatial distribution of galaxies in the universe,” in the Proceedings of the 2nd Crisis in Cosmology Conference, Port Angeles, WA USA, ASP Conference Series, Editor: F. Potter, Vol 413, pp.77-97, 2009.

C81. R. Povey, J.G. Hartnett and M.E. Tobar, “Search for hidden sector photons in a microwave cavity experiment,” in the Proceedings of the 5th Patras Workshop on Axions, WIMPs and WISPs, Durham, UK, 2010.

C82.    N.R. Nand, J.G. Hartnett, “Frequency stability and phase noise of an improved X-band cryocooled sapphire oscillator,” in the Proceedings of the Intl Frequency Control Symposium, Newport Beach, Calif., pp. 670 – 673, 2010.

C83.    J-M. Le Floch, J.G. Hartnett, M.E. Tobar, R. Bara, D. Mouneyrac, D. Cros, J. Krupka, “Cryogenic properties of a diamond sample at microwave frequencies,” in the Proceedings of the 2010 Intl Conf. on Electromagnetics in Advanced Applications, Sydney, Australia, pp. 837-840, 2010.

C84.    M.E. Tobar, E.N. Ivanov, J.G. Hartnett, J-M. Le Floch, P.L. Stanwix, “High Precision Microwave Interferometers and Oscillators for Applied and Fundamental Physics Applications,” in the Proceedings of the 2010 Intl Conf. on Electromagnetics in Advanced Applications, Sydney, Australia, pp. 803-806, 2010.

C85.    R. Povey, J.G. Hartnett and M.E. Tobar, “Microwave Cavity Search for Paraphotons,” Patras 2011

C86. R. Bara, J.-M. Le Floch, M.E. Tobar, P.L. Stanwix, S. Parker, J.G. Hartnett, E.N. Ivanov, “Generation of 100 GHz with parts in 1016 frequency stability using cryogenic sapphire oscillators,” Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International,  2-5 May 2011, San Francisco, USA, 2011.

C87. S.  Parker, P. Stanwix, M. Tobar, J.G. Hartnett, E. Ivanov, M. Nagel, A. Peters, “Rotating Dual Cryogenic Sapphire Oscillators with 10-16 Fractional Frequency Stability for Tests of Lorentz Invariance,” Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International,  2-5 May 2011, San Francisco, USA, 2011.

C88. N.R. Nand, J.G. Hartnett, C. Lu, State-of-the-art cryocooled sapphire oscillators, Frequency Control Symposium (FCS), 2012 IEEE International, 2012.

C89.  A.P. Hilton, J.G. Hartnett, E.N. Ivanov, and A.N. Luiten, “Ultra-high stability cryocooled sapphire microwave oscillators,” Frequency Control Symposium (FCS), 2012 IEEE International, 2014.

C99. A. Takamizawa, S. Yanagimachi, T. Tanabe, K. Hagimoto, I. Hirano, K. Watabe, T. Ikegami, J.G. Hartnett, Development of the cesium fountain frequency standard, NMIJ-F2, 2014 European Frequency and Time Forum, EFTF 2014. 394-397. 17 Nov 2015.