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Displaying 201 - 225 of 329

Robust infrared filters for x-ray spectroscopy

March 11, 2004
Author(s)
Nathan A. Tomlin, Joel Ullom, James A. Beall, Gene C. Hilton, Steven Deiker, W.Bertrand (Randy) Doriese, Kent D. Irwin, Carl D. Reintsema, Leila R. Vale, Yizi Xu
One challenge to using cryogenic detectors for x-ray spectroscopy on a scanning electron microscope is the implementation of infrared blocking filters. In order to achieve high x-ray transmission, these filters can be as thin as 250 nm and consequently are

X-ray Microcalorimeter Arrays Fabricated by Surface Micromachining

March 1, 2004
Author(s)
Gene C. Hilton, James A. Beall, Steven Deiker, Leila R. Vale, W.Bertrand (Randy) Doriese, Joern Beyer, Joel Ullom, Carl D. Reintsema, Yizi Xu, Kent D. Irwin
We are developing arrays of Mo/Cu TES-based detectors for use as as x-ray microcalorimeters and sub-mm bolometers. We have fabricated 8 x 8 pixel x-ray microcalorimeter arrays pixel using surface micromachining techniques. This surface-micromachining

A Time-Domain SQUID multiplexer for readout of x-ray microcalorimeter arrays

January 1, 2004
Author(s)
W.Bertrand (Randy) Doriese, Jonathan Beall, Joern Beyer, Steven Deiker, S. L. Ferreira, Gene C. Hilton, Kent D. Irwin, John M. Martinis, Sae Woo Nam, Carl D. Reintsema, Joel Ullom, Leila R. Vale
SQUID multiplexers are being developed at NIST for the readout of large arrays of transition-edge-sensor (TES) detectors. Applications for these arrays include x-ray materials analysis on a scanning-electron microscope and astronomical cameras for x-ray

Suppression of excess noise in transition-edge sensors using magnetic field and geometry

December 17, 2003
Author(s)
Joel N. Ullom, William B. Doriese, Gene C. Hilton, James A. Beall, Steven Deiker, Kent D. Irwin, Carl D. Reintsema, Leila R. Vale, Yizi Xu
We report recent progress at NIST on Mo/Cu Transition-Edge Sensors (TESs). While the signal- band noise of our sensors agrees with theory, we observe excess high-frequency noise. We describe this noise and demonstrate that it can be heavily suppressed by a

Prototype system for superconducting quantum interference device multiplexing of large-format transition-edge sensor arrays

September 25, 2003
Author(s)
Carl D. Reintsema, Joern Beyer, Sae Woo Nam, Steven Deiker, Gene C. Hilton, Kent D. Irwin, Joel N. Ullom, Leila R. Vale, Michael MacIntosh
We discuss the implementation of a time-division SQUID multiplexing system for the instrumentation of large-format transition-edge sensors (TES) arrays. We cover design and integration issues concerning cryogenic SQUID multiplexers and amplifiers, signal

Time-Division Superconducting Quantum Interference Device Multiplexer for Transition-Edge Sensors

August 1, 2003
Author(s)
Piet DeKorte, Joern Beyer, Steven Deiker, Gene C. Hilton, Kent D. Irwin, Michael MacIntosh, Sae Woo Nam, Carl D. Reintsema, Leila R. Vale, Martin Huber
We report on the design and performance of our second-generation 32-channel time-division multiplexer developed for the read-out of large-format arrays of superconducting transition-edge sensors. We present design issues and measurement results on its gain

In-focal-plane SQUID multiplexer

July 11, 2003
Author(s)
Kent D. Irwin, Damian Audley, James A. Beall, Joern Beyer, Steven Deiker, W.Bertrand (Randy) Doriese, William Duncan, Gene C. Hilton, Wayne Holland, Joel Ullom, Leila R. Vale, Yizi Xu
Superconducting quantum interference device (SQUID) multiplexers make it possible to build arrays of thousands of low-temperature microcalorimeters and bolometers based on superconducting transition-edge sensors (TES) with a manageable number of readout

A Time-Domain SQUID Multiplexer System for Read-Out of Superconducting Transition-Edge-Sensor Arrays

July 7, 2003
Author(s)
Carl D. Reintsema, James A. Beall, Steven Deiker, W.Bertrand (Randy) Doriese, Gene C. Hilton, Kent D. Irwin, Sae Woo Nam, Leila R. Vale, Joel Ullom, Yizi Xu, Joern Beyer, Martin Huber
The development of time-domain SQUID multiplexers enables the integration of superconducting transition-edge sensors (TES) into arrays of thousands of elements while maintaining a manageable number of readout channels. The applications for detector arrays

SCUBA-2: Developing the Detectors

June 2, 2003
Author(s)
William Duncan, Wayne Holland, Damian Audley, M. Cliffe, T. Hodson, B. D. Kelly, X. Gao, D. Gostick, Michael MacIntosh, H. McGregor, T. Peacocke, Kent D. Irwin, Gene C. Hilton, Steven Deiker, Joern Beyer, Carl D. Reintsema, Anthony Walton, William Parkes, T. Stevenson, Alan Gundlach, Camilla Dunare, Peter Ade
SCUBA-2 is a second generation, wide-field submillimeter camera under development for the James Clerk Maxwell Telescope. With over 12,000 pixels, in two arrays, SCUBA-2 will map the submillimeter sky 1000 times faster than the current SCUBA instrument to

Electronics for Arrays of Transition Edge Sensors using Digital Signal Processing

June 1, 2003
Author(s)
Sae Woo Nam, Joern Beyer, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, John M. Martinis
Single-pixel transition-edge sensors (TES) are useful for a variety of applications requiring the detection of photons from sub-millimeter wavelengths to gamma rays. Arrays of TESs are required in the next-generation instruments to continue to be useful

Performance of 32-channel Time-Division SQUID Multiplexer for Cryogenic Detector Arrays

June 1, 2003
Author(s)
Joern Beyer, Piet DeKorte, Carl D. Reintsema, Sae Woo Nam, Gene C. Hilton, Leila R. Vale, Kent D. Irwin
Multiplexed readout is a practical requirement for the successful deployment of large-scale cryogenic detector arrays in applications ranging from x-ray microanalysis to sub-millimeter astronomy. We report on the development of a time-division SQUID

Superconducting Multiplexers for Transition-Edge Sensors

June 1, 2003
Author(s)
Kent D. Irwin, James A. Beall, Joern Beyer, Steven Deiker, W.Bertrand (Randy) Doriese, S. L. Ferreira, Gene C. Hilton, Sae Woo Nam, Carl D. Reintsema, Joel Ullom, Leila R. Vale
Superconducting multiplexers make it possible to build arrays of thousands of low-temperature bolometers and microcalorimeters based on superconducting transition-edge sensors with a manageable number of readout channels. Our first generation SQUID

Surface Micromachining for Transition-Edge Detectors

June 1, 2003
Author(s)
Gene C. Hilton, James A. Beall, Steven Deiker, Joern Beyer, Leila R. Vale, Joel Ullom, Kent D. Irwin
We are developing arrays of high performance detectors based on superconducting transition-edge sensors (TES) for application in x-ray materials analysis as well as x-ray and sub-mm astronomy. In order to obtain the desired thermal time constants, as well