Výsledky vyhledávání - "S.R. Jefferts"

Precision measurement of the speed of propagation of neutrinos using the MINOS detectors

Autor: B. Fonville, L. Mualem, R. B. Patterson, S.R. Jefferts, S. R. Hahn, Philip D Adamson, R. Toner, B. Rebel, K. Lang, G. J. Bock, J. K. de Jong, M. Bishai, W. H. Miller, S. C. Tognini, Ed Powers, S. Moed Sher, M. D. Messier, V. Zhang, Z. Isvan, A. McKinley, P. J. Litchfield, H. R. Gallagher, Andrew Blake, J. Hylen, N. Tagg, G. M. Irwin, K. Ridl, S. Phan-Budd, A. Sousa, A. Timmons, G.D. Barr, Junwei Huang, Carlos Escobar, R. L. Talaga, T. Kafka, R. B. Pahlka, G. J. Feldman, C. Rosenfeld, J. Hirschauer, R. K. Plunkett, M. V. Frohne, N. E. Devenish, A. E. Kreymer, W. A. Mann, A. Holin, J. Schneps, A. Perch, Demetrios Matsakis, Marvin L Marshak, S. R. Mishra, R. A. Gomes, Thomas E. Parker, R. J. Nichol, P. Vahle, X. Qiu, Juergen Thomas, L. H. Whitehead, S. V. Cao, J. J. Evans, M. C. Sanchez, I. Anghel, P. Gouffon, D. Bogert, G. Koizumi, J. K. Nelson, R. Zwaska, M. Orchanian, Harvey B Newman, R. Mehdiyev, Leigh H. Whitehead, N. Mayer, D. A. Jensen, Alec Habig, Neil Ashby, Gregory J Pawloski, N. Poonthottathil, J. M. Paley, K. Grzelak, C. James, R. Gran, A. V. Devan, D. Cronin-Hennessy, C.D. Moore, J. A. Nowak, Joao A B Coelho, Maury Goodman, M. A. Thomson, B. Viren, Stanley G. Wojcicki, Rakesh Sharma, J. O'Connor, Adam Aurisano, A. C. Weber, M. V. Diwan, S. M S Kasahara, L. Corwin, A. Radovic, M. M. Medeiros, S. Mitchell, R. Bumgarner, A. Schreckenberger, E. Falk, J. R. Meier, N. Graf, Stefania Romisch, R. C. Webb, J. Urheim, R. Hatcher, J. A. Musser, C. White, J. L. Wright, X. Tian, D. Torretta, M. Kordosky, J. Hartnell, H. A. Rubin, P. Schreiner, C. M. Castromonte, S. Childress, C. L. McGivern, D. Naples, P. Lucas

We report a two-detector measurement of the propagation speed of neutrinos over a baseline of 734 km. The measurement was made with the NuMI beam at Fermilab between the near and far MINOS detectors. The fractional difference between the neutrino spe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c388be27d41cc224539979cd6a5933b5
https://doi.org/10.1103/PhysRevD.92.052005

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Earth station errors in two-way time and frequency transfer

Autor: Thomas E. Parker, F.G. Ascarrunz, S.R. Jefferts

Publikováno v: IEEE Transactions on Instrumentation and Measurement. 46:205-208

We have investigated the earth station errors in two-way time transfer. A 3.7-m earth station and a very small aperture terminal earth station were used in these experiments along with a transponder located on a mountain about 10 km away. The tempera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f896002a2bf3d39a766b78e0222ad920
https://doi.org/10.1109/19.571813

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Origin of 1/f PM and AM noise in bipolar junction transistor amplifiers

Autor: S.R. Jefferts, Fred L. Walls, E.S. Ferre-Pikal

Publikováno v: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 44:326-334

In this paper we report the results of extensive research on phase modulation (PM) and amplitude modulation (AM) noise in linear bipolar junction transistor (BJT) amplifiers. BJT amplifiers exhibit 1/f PM and AM noise about a carrier signal that is m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34ecab2eecd4dcd16ae165108918e7e9
https://doi.org/10.1109/58.585117

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Quantum-based SI traceable electric-field probe

Autor: Tom Heavner, S.R. Jefferts, Joshua A. Gordon, Christopher L. Holloway

Publikováno v: 2010 IEEE International Symposium on Electromagnetic Compatibility.

We are presently investigating the feasibility of developing a technique that will allow direct traceable microwave electric field (E-field) measurements. The new approach is based on atomic rf-resonance spectroscopy, where an applied electrical fiel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca32cc53d35572a552cbbe91af625aa2
https://doi.org/10.1109/isemc.2010.5711293

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The cesium physics package design for the PARCS experiment

Autor: E.A. Burt, W.M. Klipstein, S.R. Jefferts

Publikováno v: Proceedings of the 2004 IEEE International Frequency Control Symposium and Exposition, 2004..

The primary atomic reference clock in space (PARCS) is a collaboration between the National Institute of Standards and Technology (NIST), the Jet Propulsion Laboratory (JPL) and the University of Colorado to build a laser-cooled cesium-beam atomic cl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc4a1388a4114fb136ae6962c9396d92
https://doi.org/10.1109/freq.2004.1418431

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PARCS magnetic field measurement: low frequency majorana transitions and magnetic field inhomogeneity

Autor: J.H. Shirley, S.R. Jefferts

Publikováno v: IEEE International Frequency Control Sympposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003.

Knowledge of the magnetic field is required to determine the quadratic Zeeman bias of a cesium frequency standard. The small magnetic fields (C-field) used in PARCS (PARCS is the primary atomic reference clock in space project), may have sufficient i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::650a723f7ae835ffe09c02aa908da963
https://doi.org/10.1109/freq.2003.1275239

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Design studies for a high-stability laser-cooled rubidium local oscillator

Autor: Thomas E. Parker, D. Kujundzic, Thomas P. Heavner, S.R. Jefferts

Publikováno v: Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218).

The combination of a low-velocity intense source (LVIS) for Rubidium (Rb) atoms, along with a Ramsey cavity presents interesting alternatives to either traditional beam-type clocks or to the fountain geometry. The basic idea is not new, and much of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::82d99c42848e0bdd35034e45bc414853
https://doi.org/10.1109/freq.2001.956156

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