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Search Publications by: Carl D. Reintsema (Fed)

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Displaying 176 - 200 of 228

Improvements in the NIST Cryogenic Thermal Transfer Standard

May 1, 2000
Author(s)
Thomas E. Lipe Jr., Joseph R. Kinard Jr., Carl D. Reintsema
Recent improvements in the prototype of an ac-dc thermal transfer standard operating at cryogenic temperatures are described. Descriptions of two new transmission lines are presented, along with ac-dc difference measurements and Fast-Reversed DC (FRDC)

Superconducting Transition-Edge Bolometer Arrays for Ultra-Low Power Radiometry

May 1, 2000
Author(s)
Erich N. Grossman, James A. Chervenak, Kent D. Irwin, Carl D. Reintsema
A new generation of ultra-low power bolometer arrays is under development for low background infrared astronomy. This paper describes radiometric measurements on such bolometers using a cryogenic blackbody source with accurately calculable throughput

Antenna-Coupled Niobium Bolometers for MM-Wave Imaging Arrays

November 1, 1999
Author(s)
Shalva Nolen, Jonathan A. Koch, Nicholas Paulter, Carl D. Reintsema, Erich N. Grossman
Antenna-coupled thin-film niobium microbolometers designed for mm-wave imaging arrays have been fabricated and their electrical properties measured. The niobium bolometers are operated at room temperature and are located at the feeds of half-wave dipole

Superconducting Multiplexer for Arrays of Transition Edge Sensors

June 28, 1999
Author(s)
James A. Chervenak, Kent D. Irwin, Erich N. Grossman, John M. Martinis, Carl D. Reintsema, Martin Huber
We report the design and testing of an analog superconducting time-division multiplexer to instrument large format arrays of low-temperature bolometers and microcalorimeters. The circuit is designed to multiplex an array of superconducting quantum