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Topic Area: Physics

Displaying records 31 to 40 of 644 records.
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31. Synchronization between remote sites for the MINOS experiment
Topic: Physics
Published: 11/26/2012
Authors: Stefania Romisch, Steven R Jefferts, Victor Shufang Zhang, Thomas Edward Parker, Neil Ashby, P Adamson, G. Barr, A. Habig, J Meier, C. James, R. Nicol, R. Plunkett, C. Rosenfeld, Russell Bumgarner, M. Christensen, Jonathan Hirschauer, B. Fonville, Demetrios Matsakis, Ed Powers, J. Wright, Angela Mckinley
Abstract: In the context of time-of-flight measurements, the timing at the departure and arrival locations is obviously critical to the outcome of the experiment. In the case of neutrino time-of-flight experiments, the locations are many hundreds of kilometer ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913108

32. Ultra-low noise regenerative frequency divider
Topic: Physics
Published: 11/11/2012
Authors: Archita Hati, Craig W Nelson, Corey A. Barnes, Danielle Grace Lirette, Jason Anthony DeSalvo, David Allan Howe
Abstract: We designed ultra-low noise regenerative divider-by-2 circuits that operate at input frequencies of 20 MHz and 10 MHz. We achieved residual output-referred single-sideband phase noise below -162 dBc/Hz at 10 Hz offset for a single divider at these f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910794

33. Infrared hemispherical reflectance of carbon nanotube mats and arrays in the 5 µm to 50 µm wavelength region
Topic: Physics
Published: 11/1/2012
Authors: Chris Chunnilall, Aric Warner Sanders, John H Lehman, Evangelos Theocharous
Abstract: We present the absolute infrared (5 {u}m to 50 {u}m) hemispherical reflectance of films produced from commercially available carbon nanotubes. Data were obtained using the upgraded NPL directional- hemispherical reflectance measurement facility. A b ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910058

34. Broadband mid-infrared frequency upconversion with a aperiodically-poled LiNbO3 waveguide
Topic: Physics
Published: 10/15/2012
Authors: Tyler W. Neely, Lora L Nugent-Glandorf, Florian B. (Florian) Adler, Scott A Diddams
Abstract: We convert a mid-infrared frequency comb to near-infrared wavelengths through sum-frequency generation in an aperiodically poled ZnO:LiNBO3 waveguide. Conversion across a bandwidth of 2.5 {mu}m - 4.5 {mu}m is demonstrated in a single device, with inc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911472

35. 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

36. Quasianalytical modal approach for computing Casimir interactions in periodic nanostructures
Topic: Physics
Published: 10/3/2012
Authors: Francesco Intravaia, Paul S Davids, Ricardo Decca, Vladimir A Aksyuk, Daniel Lopez, Diego A. R. Dalvit
Abstract: We present an almost fully analytical technique for computing Casimir interactions between 1D periodic lamellar gratings based on a modal approach. Our method improves on previous work on Casimir modal approaches for nanostructures by using the exa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912110

37. Microsecond Accuracy at Multiple Locations: Is it possible without GPS?
Topic: Physics
Published: 10/1/2012
Author: Michael A Lombardi
Abstract: The microsecond is the most discussed unit in industrial timing systems, because microsecond accuracy is required to support critical infrastructure. Most critical infrastructure timing systems depend upon GPS, simply because microsecond accuracy is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911394

38. Enhanced WWVB Broadcast
Topic: Physics
Published: 9/26/2012
Author: John P Lowe
Abstract: Enhanced WWVB Broadcast for web site.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912222

39. The Habitable-Zone Planet Finder: A Stabilized Fiber-Fed NIR Spectrograph for the Hobby-Eberly Telescope
Topic: Physics
Published: 9/24/2012
Authors: Scott A Diddams, Suvrath Mahadevan, Lawrence W. Ramsey , Chad F. Bender, Ryan Terrien, Jason T. Wright, Samuel Halverson, Fred Hearty, M Nelson, Adam Burton, Stephen Lewis Redman, Steve Osterman, James Kasting, Michael Endl
Abstract: We present the scientific motivation and conceptual design for the recently funded Habitable-zone Planet Finder (HPF), a stabilized fiber-fed near-infrared (NIR) spectrograph for the 10 meter class Hobby-Eberly Telescope(HET) that will be capable of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911775

40. Performance of the NIST goniometer with a broad-band source and multichannel CCD based spectrometer
Topic: Physics
Published: 9/20/2012
Authors: Vyacheslav Borisovich Podobedov, Maria E Nadal, Carl C Miller
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909880