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Topic Area: Quantum Electrical Measurements

Displaying records 31 to 40 of 303 records.
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31. Comparison of the INMETRO and NIST Josephson Voltage Standards (part of the ongoing regional key comparison SIM.EM.BIPM-K10.b1)
Topic: Quantum Electrical Measurements
Published: 10/10/2009
Authors: Yi-hua Tang, Regis Pinheiro Landim, Afonso Edson, Victor Ferreira
Abstract: A direct comparison of the 10 V Josephson Voltage Standards (JVS) of the National Institute of Standards and Technology (NIST), USA and the National Institute of Metrology, Standardization and Industrial Quality (INMETRO), Brazil was made in June 200 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903758

32. A 10 Volt Turnkey Programmable Josephson Voltage Standard for DC and Stepwise-Approximated Waveforms
Topic: Quantum Electrical Measurements
Published: 9/1/2009
Authors: Charles J Burroughs, Alain Rufenacht, Paul David Dresselhaus, Samuel Paul Benz, Mike Elsbury
Abstract: The output voltage of Programmable Josephson Voltage Standard (PJVS) circuits has reached the 10 V benchmark, which was set over twenty years ago by conventional dc Josephson Voltage Standard (JVS) systems. The nonhysteretic Josephson junctions in th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903587

33. Direct Comparison between the NIST 10 V Compact Josephson Voltage Standard and 2.5 V Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 9/1/2009
Authors: Shiv Kumar Jaiswal, Yi-hua Tang
Abstract: The NIST 10V Compact Josephson Voltage Standard (CJVS) and 2.5V Programmable Josephson Voltage Standard (PJVS) were directly compared at 1.018 V and 2.511 V in February 2007. The difference between the two systems at 1.018 V (i.e. CJVS PJVS) was - ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903327

34. Broadband lumped-element integrated n-way power dividers for programmable Josephson voltage standards
Topic: Quantum Electrical Measurements
Published: 8/12/2009
Authors: Mike Elsbury, Paul David Dresselhaus, Norman F Bergren, Charles J Burroughs, Samuel Paul Benz, Zoya Popovic
Abstract: This paper presents a monolithically integrated broadband lumped-element Wilkinson power divider centered at 20 GHz, which was designed and fabricated to uniformly distribute power to arrays of Josephson junctions (JJs) for superconducting voltage st ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32944

35. Reduced Nonlinearities and Improved Temperature Measurements for the NIST Johnson Noise Thermometer
Topic: Quantum Electrical Measurements
Published: 7/31/2009
Authors: Jifeng Qu, Samuel Paul Benz, Horst Rogalla, D. R White
Abstract: The variance of temperature measurements made with the NIST Johnson noise thermometer has been reduced by use of improved cross-correlation electronics and a unique method for measuring and reducing nonlinearities. The spectral response of the voltag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902592

36. A 10 Volt 'Turn-Key' Programmable Josephson Voltage Standard for DC and Stepwise-Approximated Waveforms
Topic: Quantum Electrical Measurements
Published: 7/26/2009
Authors: Charles J Burroughs, Alain Rufenacht, Paul David Dresselhaus, Samuel Paul Benz, Mike Elsbury
Abstract: The output voltage of Programmable Josephson Voltage Standard (PJVS) circuits has reached the 10 V benchmark, which was set over twenty years ago by conventional dc Josephson Voltage Standard (JVS) systems. The non-hysteretic Josephson junctions in t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902878

37. Improved Isotopic Analysis with a Large Array of Gamma-ray Microcalorimeters
Topic: Quantum Electrical Measurements
Published: 6/30/2009
Authors: Nikhil Jethava, Joel Nathan Ullom, Douglas A Bennett, William Bertrand Doriese, James A Beall, Gene C Hilton, Robert Daniel Horansky, Kent D Irwin, Eric Sassi
Abstract: We present results from the largest array of gamma-ray microcalorimeters operated to date. The microcalorimeters consist of Mo/Cu transition-edge sensors with attached Sn absorbers. The detector array contains 66 pixels each with an active area 2.25 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33158

38. Arrays with double-stacked NbxSi1-x-Barrier Junctions for Use in Programmable Josephson Voltage Standards driven at 70 GHz
Topic: Quantum Electrical Measurements
Published: 6/16/2009
Authors: Franz Mueller, Ralf Behr, R. Wendisch, Johannes Kohlmann, Paul David Dresselhaus, Samuel Paul Benz
Abstract: Double-stacked Nb junctions with NbxSi1-x barriers were inserted into previously successfully tested 1 V and 10 V designs for Programmable Josephson voltage standards (PJVSs) with bias frequency near 70 GHz. Despite non-optimum targeting of the junct ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902666

39. Versatile co-sputtered Nb/NbxSi1-x/Nb Josephson junctions for Josephson voltage standards and high-speed superconducting digital electronics
Topic: Quantum Electrical Measurements
Published: 6/16/2009
Authors: David Inocencio Olaya, Paul David Dresselhaus, Samuel Paul Benz
Abstract: Josephson junctions that use co-sputtered amorphous Nb-Si barriers can be made with a wide variety of electrical properties depending on both the thickness of the barrier and its ratio of Nb to Si. Critical current density (Jc), specific capacitance ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902718

40. Amorphous Nb-Si Barrier Junctions for Voltage Standard and Digital Applications
Topic: Quantum Electrical Measurements
Published: 6/3/2009
Authors: David Inocencio Olaya, Paul David Dresselhaus, Samuel Paul Benz, Jon E. Bjarnason, Erich N Grossman
Abstract: Amorphous Nb-Si has been previously demonstrated as a Josephson junction barrier material for Nb-based superconducting voltage standard circuits, including both dc programmable and ac Josephson voltage standards operating at frequencies up to 20 GHz. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33155



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