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Search Publications

NIST Authors in Bold

Displaying 276 - 300 of 843

Two Volt Josephson Arbitrary Waveform Synthesizer Using Wilkinson Dividers

February 19, 2016
Author(s)
Nathan E. Flowers-Jacobs, Anna E. Fox, Paul D. Dresselhaus, Robert E. Schwall, Samuel P. Benz
The root-mean-square (rms) output voltage of the NIST Josephson arbitrary waveform synthesizer (JAWS) has been doubled from 1 V to a record 2 V by combining two new 1 V chips on a cryocooler. This higher voltage will improve calibrations of ac thermal

Reference Module in Materials Science and Materials Engineering MATS 01908

February 1, 2016
Author(s)
Randolph E. Elmquist, Anthony Hartland
The cryogenic current comparator is used to maintain national representations of the ohm based on the quantized Hall resistance standard. The measurement technique utilizes the Meissner effect to establish accurate resistance ratios with specialized

Developments in time-division multiplexing of X-ray transition-edge sensors.

December 8, 2015
Author(s)
William B. Doriese, Kelsey M. Morgan, Douglas A. Bennett, Edward V. Denison, Colin P. Fitzgerald, Joseph W. Fowler, Johnathon D. Gard, James P. Hays-Wehle, Gene C. Hilton, Kent D. Irwin, Young Il Joe, John A. Mates, Galen C. O'Neil, Carl D. Reintsema, Nigel O. Robbins, Daniel R. Schmidt, Daniel S. Swetz, Hideyuki Tatsuno, Joel N. Ullom, Leila R. Vale
Time-division multiplexing (TDM) is a mature scheme for the readout of transition-edge sensors. Variants of TDM, which is based on superconducting-quantum-interference-device (SQUID) current amplifiers, have to date been field-deployed in several

The Practice of Pulse Processing

November 12, 2015
Author(s)
Joseph W. Fowler, Bradley K. Alpert, William B. Doriese, Young Il Joe, Galen C. O'Neil, Joel N. Ullom, Daniel S. Swetz
The analysis of data from x-ray microcalorimeters requires great care; their excellent intrinsic energy resolution cannot usually be achieved in practice without a statistically near-optimal pulse analysis and corrections for important systematic errors

Microcalorimeter Spectroscopy at High Pulse Rates: a Multi-Pulse Fitting Technique

August 24, 2015
Author(s)
Joseph W. Fowler, Bradley K. Alpert, William B. Doriese, Young Il Joe, Galen C. O'Neil, Cherno Jaye, Joel N. Ullom, Daniel A. Fischer, Daniel S. Swetz
Transition edge sensor microcalorimeters can measure x-ray and gamma-ray energies with very high energy resolution and high photon-collection efficiency. For this technology to reach its full potential in future x-ray observatories, each sensor must be

Macroscopic Subkelvin Refrigerator Employing Superconducting Tunnel Junctions

August 10, 2015
Author(s)
Xiaohang NMN Zhang, Peter J. Lowell, Brandon L. Wilson, Galen C. O'Neil, Joel N. Ullom
In this paper, we demonstrate a general-purpose macroscopic refrigerator based on the transport of hot electrons through superconducting tunnel junctions. Our refrigerator is intended to provide access to temperatures below those accessible using pumped

Advanced ACTPol Multichroic Polarimeter Array Fabrication Process for 150 mm Wafers

July 22, 2015
Author(s)
Shannon M. Duff, Gene C. Hilton, Johannes Hubmayr, James A. Beall, Jason E. Austermann, Daniel T. Becker, Jeffrey L. Van Lanen
Advanced ACTPol is a third generation cosmic microwave background (CMB) receiver, deploying in 2016 on the Atacama Cosmology Telescope (ACT) in the Atacama desert of Chile. Spanning five frequency bands from 25 – 280 GHz and having a total of nearly 5800

A near-infrared 64-pixel superconducting nanowire single photon detector array with integrated multiplexed readout

May 14, 2015
Author(s)
Michael S. Allman, Varun B. Verma, Martin J. Stevens, Thomas Gerrits, Robert D. Horansky, Adriana E. Lita, Francesco Marsili, A. Beyer, Matthew Shaw, D. Kumor, Richard P. Mirin, Sae Woo Nam
We demonstrate a 64-pixel free-space-coupled array of superconducting nanowire single photon detectors optimized for high detection efficiency in the near-infrared range. An integrated, readily scalable, multiplexed readout scheme is employed to reduce the

Graph-based analysis of nonreciprocity in coupled-mode systems

February 10, 2015
Author(s)
Leonardo M. Ranzani, Jose A. Aumentado
In this work we derive the general conditions for obtaining nonreciprocity in multi-mode parametrically- coupled systems. The results can be applied to a broad variety of optical, microwave, and hybrid systems including recent electro- and opto-mechanical

Spin-transfer torque switching observed in nanopillar superconducting-magnetic hybrid Josephson junctions

January 9, 2015
Author(s)
Burm Baek, William H. Rippard, Matthew R. Pufall, Samuel P. Benz, Stephen E. Russek, Horst Rogalla, Paul D. Dresselhaus
Combining superconducting and magnetic materials to create novel superconducting devices has been motivated by the discovery of the Josephson critical current (Ics) oscillations with magnetic layer thickness and the demonstration of devices with switchable
Displaying 276 - 300 of 843