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Topic Area: Quantum Electrical Measurements
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Displaying records 31 to 40 of 302 records.
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31. 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

32. 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

33. 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

34. 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

35. 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

36. 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

37. 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

38. 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 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

39. Amorphous Nb-Si Barrier Junctions for Voltage Standard and Digital Applications
Topic: Quantum Electrical Measurements
Published: 6/3/2009
Authors: David 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

40. Nonlinear Behavior of Electronic Components Characterized with Precision Multitones from a Josephson Arbitrary Waveform Synthesizer
Topic: Quantum Electrical Measurements
Published: 6/3/2009
Authors: Samuel Paul Benz, Ryan C. Toonen
Abstract: We have extended the application of quantum-based electrical standards from single frequency calibrations to multi-tone tests that can be used to characterize the nonlinear behavior of electronic components and circuits. Specifically, we have used a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33176



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