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Topic Area: Physics
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Displaying records 51 to 60 of 763 records.
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51. A microfabricated photonic magnetometer
Topic: Physics
Published: 4/20/2009
Authors: Jan Preusser, Svenja A Knappe, John E Kitching, Vladislav Gerginov
Abstract: We present initial measurements of an atomic magnetometer in which the microfabricated sensor head is coupled to the control system by optical fibers. Since there are no electrical connections, the sensor head is largely non-magnetic and degradation ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902668

52. A new algorithm for clock weights for the SIM time scale
Topic: Physics
Published: 5/24/2012
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, E. de Carlos-Lopez
Abstract: A time and frequency comparison system has been developed for the Sistema Interamericano de Metrologia (SIM) region in order to compare in real time the time references maintained at the SIM national metrology institutes (NMIs). Since January 2010 a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911482

53. A review of time and frequency transfer methods
Topic: Physics
Published: 12/5/2008
Author: Judah Levine
Abstract: I will discuss three methods of transmitting time and frequency information: one-way, two-way and common-view. I will describe the advantages and limitations of the different methods including ncertainty estimates for systems that are based on them. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842514

54. A simplified optical lattice clock
Topic: Physics
Published: 4/2/2009
Authors: N Poli, M.G. Tarallo, M. Schioppo, A. Alberti, Giorgio Ferrari, V. Ivanov, Christopher W Oates, G.M. Tino
Abstract: While existing optical lattice clocks demonstrate a high level of performance, they remain complex experimental devices. In order to address a wider range of applications including those requiring transportable devices, it will be necessary to simp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901149

55. A single-ion optical clock with high accuracy
Topic: Physics
Published: 7/14/2006
Authors: W Oskay, Scott A Diddams, Elizabeth A Donley, Tara Michele Fortier, Thomas Patrick Heavner, Leo W. Hollberg, Wayne M Itano, Steven R Jefferts, M J. Jensen, Kyoungsik Kim, F Levi, Thomas Edward Parker, James C Bergquist
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841942

56. Abraham's Force on a Highly Dispersive Medium
Topic: Physics
Published: Date unknown
Authors: Paul D Lett, L Wang
Abstract: We consider the radiation force on highly dispersive media. In doing so we reconsider an experiment proposed to measure the Abraham force term in the stress-energy tensor at optical frequencies by measuring the displacement of a transparent dielectr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=840670

57. Absolute Ag108m Characterization Based on Gamma-gamma Coincident Detection by Two Nal(T1) Detectors
Topic: Physics
Published: 12/4/2009
Author: Peter Volkovitsky
Abstract: A two-dimensional analysis of three coincident gammas in Ag108m decay, detected by two Nal(T1) scintillation detectors, allows a direct measurement of the source activity. A modification of Eldridge-Crowther formulas derived originally for 125I was ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902847

58. Absolute Co-60 characterization based on gamma-gamma coincident detection by two Nal(Tl) detectors
Topic: Physics
Published: 7/1/2009
Authors: Peter Volkovitsky, P. Naudus
Abstract: A new modification of gamma-gamma coincident activity measurement method was used for characterization of Co-60. Two-dimensional analysis of coincident events allows carefully calculating the fraction of Compton scattered gammas for each of two gamm ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900199

59. Absolute Radiometers, in Experimental Methods in the Physical Sciences, ed. by A.C. Parr, R.U. Datla and J.L. Gardner
Topic: Physics
Published: 1/1/2005
Authors: N P Fox, Joseph Paul Rice
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104466

60. Absolute absorption and dispersion of a rubidium vapour in the hyperfine Paschen-Back regime
Topic: Physics
Published: 10/4/2012
Authors: Svenja A Knappe, L. Weller, K.S. Kleinbach, M.A. Zentile, C.S. Adams, I.G. Hughes
Abstract: Here we report on measurements of the absolute absorption and dispersion properties of an isotopically pure 87Rb vapour for magnetic fields up to and including 0.6 T. We discuss the various regimes which arise when the hyperfine and Zeeman interactio ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911987



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