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Displaying 276 - 300 of 301

Present Results and Future Goals of the Cryogenic Dark Matter Search

January 1, 2002
Author(s)
T. A. Perera, D. Abrams, D. S. Akerib, D. B. Bauer, A. Bolozdynya, P. Brink, R. Bunker, B. Cabrera, D. O. Caldwell, J. P. Castle, Fengbo Hang, R. M. Clarke, M. B. Crisler, R. Dixon, D. Driscoll, S. Eichblatt, R. J. Gaitskell, S. R. Golwala, E. E. Haller, J. Hellmig, D. Holmgren, Martin Huber, S. Kamat, C. Maloney, V. Mandic, John M. Martinis, P. Meunier, Sae Woo Nam, Harold E. Nelson, M. Perillo-Issac, R. R. Ross, T. Saab, B. Sadoulet, J. Sander, R. W. Schnee, T. Shutt, Amy Smith, A. H. Sonnenschein, A. L. Spadafora, G. Wang
The Cryogenic Dark Matter Search (CDMS) uses Ge and Si detectors to search for Weakly Interacting Massive Particles (WIMPs) via their elastic-scattering interaction with atomic nuclei. The present results from CDMS give limits on the spin-independent WIMP

TES Detector Noise Limited Readout Using SQUID Multiplexers

January 1, 2002
Author(s)
Johannes G. Staguhn, C. A. Allen, D. J. Benford, James A. Chervenak, M. M. Freund, S. A. Khan, A. S. Kutyrev, S. H. Mosely, Rick A. Shafer, Steven Deiker, Erich N. Grossman, Gene C. Hilton, Kent D. Irwin, John M. Martinis, Sae Woo Nam, David A. Rudman, David A. Wollman
The availability of superconducting Transition Edge Sensors (TES) with large numbers of individual detector pixels requires multiplexers for efficient readout. The usage of multiplexers limits the number of wires needed between the cryogenic electronics

TES Spectrophotometers for Near IR/Optical/UV

January 1, 2002
Author(s)
B. Cabrera, John M. Martinis, Aaron J. Miller, Sae Woo Nam, R. W. Romani
We describe our recent progress on superconducting transition-edge sensor (TES) spectrophotometers in the spectral range from the near infrared through ultraviolet bands. These instruments time-stamp (0.1 υs) and energy-resolve (0.15 eV FWHM) each photon

Phase-resolved Crab Studies with a Cryogenic Transition-Edge Sensor Spectrophotometer

December 10, 2001
Author(s)
R. W. Romani, Aaron J. Miller, B. Cabrera, Sae Woo Nam, John M. Martinis
We are developing time- and energy-resolved near-IR/optical/UV photon detectors based on sharp superconducting-normal transition edges in thin films. We report observations of the Crab pulsar made during prototype testing at the McDonald 2.7 m with a fiber

Progress Towards Arrays of Microcalorimeter X-ray Detectors

September 1, 2001
Author(s)
Sae Woo Nam, David A. Wollman, Dale Newbury, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Steven Deiker, Norman F. Bergren, John M. Martinis
The high performance of single-pixel microcalorimeter EDS (υcal EDS) has been shown to be very useful for a variety of microanalysis cases. The primary advantage of υcal EDS over conventional EDS is that factor of 25 improvement in energy resolution (3 eV

High Performance Transition-Edge-Sensor Based Detectors

June 1, 2001
Author(s)
Gene C. Hilton, Steven Deiker, Kent D. Irwin, Sae Woo Nam, John M. Martinis, David A. Wollman
High performance detectors utilizing transition-edge sensors (TES) have been demonstrated for photon energies ranging from the infrared to the x-ray. In the soft x-ray band we have demonstrated the highest energy resolution yet achieved for any energy

Microfabricated Transition-Edge X-ray Detectors

March 1, 2001
Author(s)
Gene C. Hilton, John M. Martinis, Kent D. Irwin, Norman F. Bergren, David A. Wollman, Martin Huber, Sae Woo Nam
We are developing high performance x-ray detectors based on superconducting transition-edge sensors (TES) for application in materials analysis and astronomy. Using our recently developed fully lithographic TES fabrication process, we have made devices

Transition Edge Sensor Array Development

March 1, 2001
Author(s)
Steven Deiker, James A. Chervenak, Gene C. Hilton, Kent D. Irwin, John M. Martinis, Sae Woo Nam, David A. Wollman
NIST is fabricating multi-pixel arrays of our transition edge sensor (TES) microcalorimeter detectors for use in microanalysis and x-ray astrophysics. We have developed room temperature digital feedback electronics and a successful SQUID multiplexing

Low Voltage Microanalysis using Microcalorimeter EDS

January 1, 2001
Author(s)
David A. Wollman, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Norman F. Bergren, Steven Deiker, John M. Martinis, Martin Huber, Dale Newbury
We present the current performance of the prototype high-resolution microcalorimeter energy-dispersive spectrometer (υcal EDS) developed at NIST for x-ray microanalysis. In particular, the low-energy υcal EDS designed for operation in the energy range from

A Mo-Cu Superconducting Transition-Edge Microcalorimeter with 4.5 eV Energy Resolution at 6 keV

December 31, 2000
Author(s)
Kent D. Irwin, Gene C. Hilton, John M. Martinis, Steven Deiker, Norman F. Bergren, Sae Woo Nam, David A. Rudman, David A. Wollman
We describe a superconducting transition-edge microcalorimeter with an energy resolution of 4.5 1 0.1 eV full-width at half-maximum (FWHM) for Mn Kα X-rays from an 55Fe source. The thermometer consists of a photolithographically patterned Mo-Cu

Multiplexed Readout of Superconducting Bolometers

December 31, 2000
Author(s)
D. J. Benford, C. A. Allen, James A. Chervenak, M. M. Freund, A. S. Kutyrev, S. H. Mosely, Rick A. Shafer, Johannes G. Staguhn, Erich N. Grossman, Gene C. Hilton, Kent D. Irwin, John M. Martinis, Sae Woo Nam, Carl D. Reintsema
Studies of astrophysical emission in the far-infrared and submillimeter require large arrays of detectors containing from hundreds to thousands of elements. A multiplexed readout is necessary for practical implementation of such arrays, and can be

Superconducting Transition-Edge-Microcalorimeter X-ray Spectrometer with 2 eV Energy Resolution at 1.5 keV

December 31, 2000
Author(s)
David A. Wollman, Sae Woo Nam, Dale Newbury, Gene C. Hilton, Kent D. Irwin, Norman F. Bergren, Steven Deiker, David A. Rudman, John M. Martinis
We describe the operation and performance of a prototype microcalorimeter ?energy-dispersive? (nondispersive) x-ray spectrometer (mcal EDS) developed at NIST for use in x-ray microanalysis and x-ray astronomy. The low-energy microcalorimeter detector

Development of Arrays of TES X-ray Detectors

December 1, 2000
Author(s)
Steven Deiker, James A. Chervenak, Gene C. Hilton, Martin Huber, Kent D. Irwin, John M. Martinis, Sae Woo Nam, David A. Wollman
Both the x-ray astrophysics and microanalysis communities have a need for large format arrays of high-spectral-resolution x-ray detectors. To meet this need, we are transferring our successful single pixel Transition Edge Sensor (TES) x-ray

Microcalorimeter Energy Dispersive X-ray Spectrometer for Low Voltage Microanalysis

November 1, 2000
Author(s)
David A. Wollman, John M. Martinis, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Norman F. Bergren, Steven Deiker, Martin Huber, Dale Newbury
Improved x-ray detector technology continues to be a critical metrological need in the semiconductor industry for contaminant particle analysis 1,2 and for high-spatial-resolution x-ray microanalysis using low-beam-voltage field-emission scanning electron

A sounding Rocket Mission to Study the Solar Soft X-Ray and EUV Emission Using Transition-Edge sensor Technology

August 1, 2000
Author(s)
K Wamba, H Walker, Aaron J. Miller, B. Cabrera, D W. Robertson, P F. Boerner, D S. Martinez-Galarce, S F. Powell, Sae Woo Nam, Kent D. Irwin, Steven Deiker, R B. Hoover, T W. Barbee, P F. Baker
We are developing a new sounding rocket payload, the Advanced Technology Solar Spectroscopic Imager (ATSSI) that will use an 8x8 array of transition edge sensors (TES) to obtain true spectroheliograms in a spectral bandpass spanning 10 eV to 3 keV. The TES

Microcalorimeter EDS: Benefits and Drawbacks

August 1, 2000
Author(s)
David A. Wollman, Dale Newbury, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Steven Deiker, Norman F. Bergren, John M. Martinis
The commercial introduction of high-count-rate, near-room-temperature silicon drift detectors (presently available) and high-energy-resolution cryogenic microcalorimeters (forthcoming) is an exciting development in x-ray microanalysis, in which detector

Microcalorimeter Energy-Dispersive Spectrometry Using a Low Voltage Scanning Electron Microscope

July 1, 2000
Author(s)
David A. Wollman, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, Norman F. Bergren, David A. Rudman, John M. Martinis, Dale Newbury
We describe the current performance of the prototype microcalorimeter energy-dispersive spectrometer (5cal EDS) developed at NIST for X-ray microanalysis. We show that the low-energy 5cal EDS, designed for operation in the energy range 0.2-2 keV, offers

Exclusion Limits on the WIMP-Nucleon Cross Section from the Cryogenic Dark Matter Search

June 19, 2000
Author(s)
R. Abusaidi, D. S. Akerib, P. D. Barnes, D. B. Bauer, A. Bolozdynya, P. Brink, R. Bunker, B. Cabrera, D. O. Caldwell, J. P. Castle, R. M. Clarke, P. Colling, M. B. Crisler, A Cummings, A. Da Silva, A. K. Davies, R. Dixon, B. L. Dougherty, D. Driscoll, S. Eichblatt, J. Emes, R. J. Gaitskell, S. R. Golwala, D. Hale, E. E. Haller, J. Hellmig, Martin Huber, Kent D. Irwin, J. Jochum, F. P. Lipschultz, A. Lu, V. Mandic, John M. Martinis, Sae Woo Nam, Harold E. Nelson, B. Neuhauser, M. J. Penn, T. A. Perera, M. Perillo-Issac, B Pritychenko, R. R. Ross, T. Saab, B. Sadoulet, R. W. Schnee, D. N. Seitz, P. Shestople, T. Shutt, Amy Smith, G. W. Smith, A. H. Sonnenschein, A. L. Spadafora, W. Stockwell, J. D. Taylor, Stephen White, S. Yellin, B. A. Young
The cryogenic Dark Matter Search (CDMS) employs Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. CDMS

Exclusion Limits on the WIMP-Nucleon Scattering Cross-Section from the Cryogenic Dark Matter Search

January 1, 2000
Author(s)
S. R. Golwala, R. Abusaidi, D. S. Akerib, P. D. Barnes, D. B. Bauer, A. Bolozdynya, P. Brink, B. Cabrera, D. O. Caldwell, J. P. Castle, R. M. Clarke, P. Colling, M. B. Crisler, A. Da Silva, A. K. Davies, R. Dixon, S. Eichblatt, Kent D. Irwin, R. J. Gaitskell, E. E. Haller, J. Hellmig, Martin Huber, J. Jochum, F. P. Lipschultz, John M. Martinis, Sae Woo Nam, J. Nelson, B. Neuhauser, T. A. Perera, M. Perillo-Issac, R. R. Ross, T. Saab, B. Sadoulet, R. W. Schnee, P. Shestople, T. Shutt, Amy Smith, A. H. Sonnenschein, A. L. Spadafora, S. Yellin, B. A. Young
The Cryogenic Dark Matter Search (CDMS) employs massive ionization- and phonon-mediated detectors to search for WIMPs via their elastic scattering interactions with nuclei while discriminating against interactions by other background particles. Limits on

First Astronomical Application of a Cryogenic Transition Edge Sensor Spectrophotometer

December 31, 1999
Author(s)
R. W. Romani, Aaron J. Miller, B. Cabrera, Enectali Figueroa-Feliciano, Sae Woo Nam
We report on the first astronomical observations with a photon-counting pixel detector that provides arrival time ((delta)R, less then or equal to} 0.15 eV) resolved measurements from the near-IR through the near UV. Our test Observations were performed by

Toward a 2-eV Microcalorimeter X-ray Spectrometer for Constellation-X

October 1, 1999
Author(s)
C. K. Stahle, Simon R. Bandler, T W. Barbee, J. Beeman, R.P. Brekosky, B. Cabrera, M. Cunningham, Steven Deiker, Enectali Figueroa-Feliciano, F. M. Finkbeiner, G R. Frank, K. C. Gendreau, E. E. Haller, Gene C. Hilton, Kent D. Irwin, R. L. Kelley, S. E. Labov, M. J. Li, N. Madden, John M. Martinis, D. McCammon, Sae Woo Nam, F. S. Porter, H. Schnopper, E. H. Silver, A. E. Szymkowiak, G. S. Tucker, A. Walker, David A. Wollman
Constellation-X is a cluster of identical observatories that together constitute a promising concept for a next-generation, high-throughput, high-resolution, astrophysical x-ray spectroscopy mission. The heart of the Constellation-X mission concept is a
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