Zobrazeno 1 - 10
of 88
pro vyhledávání: '"John A. Lipa"'
Publikováno v:
2020 IEEE Aerospace Conference.
Testing drag-free proof mass systems for gravitational physics requires a ground test system that simulates space conditions as closely as possible. In this experiment, a magnetic levitation system was built, which can levitate, hold, and spin a holl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::069153b477a586687fea0c022a51d65d
https://doi.org/10.1109/aero47225.2020.9172658
https://doi.org/10.1109/aero47225.2020.9172658
Autor:
Claus Braxmaier, Sven Herrmann, Belgacem Jaroux, Thilo Schuldt, Turki Al Saud, Simon P. Worden, Klaus Döringshoff, Si Tan, Claus Lämmerzahl, Abdul Alfauwaz, Hansjörg Dittus, John A. Lipa, Sasha Buchman, Grant D. Cutler, Badr Alsuwaidan, J. Hanson, Ulrich Johann, Abdulaziz Alhussien, Shailendhar Saraf, Byer Robert, Norman Gürlebeck, Achim Peters
Publikováno v:
Scopus-Elsevier
fundamental physics test, Kennedy-Thorndike, clocks, ultra-stable cavities, iodine spectroscopy, space instrumentation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84f62644b84aa49658d6afa11eebc8aa
https://doi.org/10.1142/9789813226609_0467
https://doi.org/10.1142/9789813226609_0467
Autor:
Shailendhar Saraf, Si Tan, Abdul Alfauwaz, D.B. DeBra, John A. Lipa, Andreas Zoellner, Sasha Buchman
Publikováno v:
Optics express. 25(21)
We present a method for 3D sub-nanometer displacement measurement using a set of differential optical shadow sensor. It is based on using pairs of collimated beams on opposite sides of an object that are partially blocked by it. Applied to a sphere,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8cfab11d3ba5a1b11d424167a29bab04
https://pubmed.ncbi.nlm.nih.gov/29041190
https://pubmed.ncbi.nlm.nih.gov/29041190
Autor:
John A. Lipa, Richard T. Baran, James G. Williams, Suwen Wang, William M. Folkner, Ruwan P. Somawardhana, Gary M. Gutt, Randall C. Hein, Slava G. Turyshev
Publikováno v:
Experimental Astronomy. 36:105-135
Lunar laser ranging (LLR) has made major contributions to our understanding of the Moon's internal structure and the dynamics of the Earth-Moon system. Because of the recent improvements of the ground-based laser ranging facilities, the present LLR m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f2c5a2e8328acb7031f83d1d25ea4e8
https://doi.org/10.1007/s10686-012-9324-z
https://doi.org/10.1007/s10686-012-9324-z
Autor:
John A. Lipa, Andreas Zoellner, Faisal Alamri, Shailendhar Saraf, Abdulrahman S. Alfauwaz, Abdulaziz Alhussain, D.B. DeBra, Suwen Wang, Sasha Buchman
Publikováno v:
46th AIAA Thermophysics Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fcd579a53060144d226692064432aea
https://doi.org/10.2514/6.2016-3702
https://doi.org/10.2514/6.2016-3702
Autor:
C. W. F. Everitt, D. Hipkins, Thomas J. Holmes, Jie Li, M. I. Heifetz, J. M. Lockhart, Sasha Buchman, Barry Muhlfelder, D.B. DeBra, John A. Lipa, M. Dolphin, Y. Ohshima, M. Taber, M. Adams, V G Solomonik, John Mester, P W Worden, J. Kolodziejczak, S. Wang, William J. Bencze, B. Clarke, A. Silbergleit, G. M. Keiser, J. P. Turneaure, M. Salomon, K. Stahl, John Conklin, Bradford W. Parkinson
Publikováno v:
Space Science Reviews. 148:53-69
This is the first of five connected papers detailing progress on the Gravity Probe B (GP-B) Relativity Mission. GP-B, launched 20 April 2004, is a landmark physics experiment in space to test two fundamental predictions of Einstein’s general relati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dbd7be1816211a6a43e0355a083e8e6
https://doi.org/10.1007/s11214-009-9524-7
https://doi.org/10.1007/s11214-009-9524-7
Publikováno v:
International Journal of Modern Physics D. 16:2393-2398
In recent years the possibility has been raised of Lorentz invariance violations arising from physics beyond the Standard Model. Some of these effects manifest themselves as small anisotropies in the velocity of light, c. By comparing the resonant fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a910ba0751bb12d0e165bd5448b87518
https://doi.org/10.1142/s0218271807011528
https://doi.org/10.1142/s0218271807011528
Autor:
Slava G. Turyshev, Nan Yu, C. W. Francis Everitt, Mark A. Kasevich, Michael Shao, Neil Ashby, Alexander Kusenko, John A. Lipa, John Mester, Ho Jung Paik, Ulf E. Israelsson, Ronald L. Walsworth, Edward L. Wright, Harvey Gould, Robert D. Reasenberg
Publikováno v:
International Journal of Modern Physics D. 16:1879-1925
Space-based experiments today can uniquely address important questions related to the fundamental laws of Nature. In particular, high-accuracy physics experiments in space can test relativistic gravity and probe the physics beyond the Standard Model;
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f4503655a371b164ea3151e04bb768c
https://doi.org/10.1142/s0218271807011760
https://doi.org/10.1142/s0218271807011760
Autor:
Q. Li, John A. Lipa
Publikováno v:
Journal of Low Temperature Physics. 149:1-27
We report measurements of the temperature dependence of the thermal conductivity of helium in the region just above the lambda point and the critical boundary resistance on both sides of the transition. The data were obtained using a cell with a gap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75ff93552c6e5ecb5fc9b4e51809c2ee
https://doi.org/10.1007/s10909-007-9493-8
https://doi.org/10.1007/s10909-007-9493-8
Autor:
William J. Bencze, Sasha Buchman, C. W. F. Everitt, Bradford W. Parkinson, D.B. DeBra, Jie Li, M. Taber, Barry Muhlfelder, M. I. Heifetz, S. Wang, G. M. Keiser, J. P. Turneaure, G. Green, Alexander S. Silbergleit, John A. Lipa, B. Clarke, D. N. Hipkins
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 166:147-152
The Gravity Probe B experiment was developed to test two predictions of General Relativity; the Geodetic and the frame-dragging precessions of a mechanical gyroscope due to the gravitational field of the Earth. This space-based, cryogenic experiment
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e7a185795f9943be6102e2208e613ed
https://doi.org/10.1016/j.nuclphysbps.2006.12.090
https://doi.org/10.1016/j.nuclphysbps.2006.12.090