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Displaying 401 - 425 of 1383

Operation of an X-ray transition-edge sensor cooled by tunnel junction refrigerators

January 19, 2008
Author(s)
Nathan A. Tomlin, James A. Beall, Gene C. Hilton, Kent D. Irwin, Galen O'Neil, Dan Schmidt, Leila R. Vale, Joel Ullom
We demonstrate successful cooling of an X-ray transition-edge sensor (TES) using solid-state refrigerators based on normal-metal/insulator/superconductor (NIS) tunnel junctions. Above the TES transition temperature (Tc), we use Johnson noise thermometry to

Coupling Nanowire Chemiresistors With Microhotplate Platforms for Advanced Gas Sensing

August 6, 2007
Author(s)
Douglas C. Meier, Stephen Semancik, Bradley Button, Eugene Strelcov, Andrei Kilmakov
Recent advances in nanotechnology have yielded new materials and structures that offer great potential for improving sensitivity, selectivity and stability of the next generation of chemical gas sensors. To successfully fabricate practical devices, the

Work Function Characterization of TaSiN and TaCN Electrodes Using CV, IV, IPE and SKPM

November 1, 2006
Author(s)
Hao Xiong, Nhan V. Nguyen, Joseph J. Kopanski, John S. Suehle, Eric M. Vogel
Work function of TaSiN (TaCN) films on HfO2 or SiO2 gate dielectrics is investigated for the first time using a combination of Capacitance?Voltage, Fowler?Nordheim tunneling, internal Photoemission, and scanning Kelevin probe microscopy methods, which

Spindle Health Diagnosis Based on Analytic Wavelet Enveloping

September 1, 2006
Author(s)
Li Zhang, Robert Gao, Kang B. Lee
A new diagnostic technique for identifying structural defects in spindles was developed, based on the analytic wavelet transform. The new technique extracts defect-induced impulses from the spindle vibration signal and constructs their envelopes in a

Wavelet-Based Enveloping for Spindle Health Diagnosis

May 1, 2005
Author(s)
Li Zhang, Robert Gao, Kang B. Lee
A new method for identifying structural defect-induced vibration signals was developed based on the analytic wavelet transform. The advantage of this method is that it extracts defect-related impulse signal and constructs its envelope in a single step

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

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

T c Suppression in Superconducting Films for use in Transition Edge Sensors

June 1, 2003
Author(s)
Steven Deiker, Gene C. Hilton, Kent D. Irwin, William Rippard, Steve Ruggiero, Leila R. Vale, B. A. Young
Transition edge sensor (TES) microcalorimeters have proved their value as photon detectors in several wavelength regimes. The central elecement of a TES is a superconducting film with a transition temperature designed to be at a specific temperature
Displaying 401 - 425 of 1383