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Progress on Background-Limited Membrane-Isolated TES Bolometers for Far-IR/Submillimeter SpectroscopyTo determine the lowest attainable phonon noise equivalent power (NEP) for membrane-isolation bolometers, we fabricated and measured the thermal conductance of suspended Si3N4 beams with different geometries via a noise thermometry technique. We measured beam cross-sectional areas ranging from 0.35 x 0.5 (micro)m(sup 2) to 135 x 1.0 (micro)m(sup 2) and beam lengths ranging from (micro)m to 8300 (micro)m. The measurements directly imply that membrane-isolation bolometers are capable of reaching a phonon noise equivalent power (NEP) of 4 x 10(sup -20)W/Hz(sup 1)/O . This NEP adequate for the Background-Limited Infrared-Submillimeter Spectrograph (BLISS) proposed for the Japanese SPICA observatory, and adequate for NASA's SAFIR observatory, a 10-meter, 4 K telescope to be deployed at L2. Further, we measured the heat capacity of a suspended Si3N4 membrane and show how this result implies that one can make membrane-isolation bolometers with a response time which is fast enough for BLISS.
Document ID
20070023594
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Kenyon, M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Day, P. K. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bradford, C. M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Bock, J. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Leduc, H. G. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 23, 2013
Publication Date
May 29, 2006
Subject Category
Instrumentation and Photography
Meeting Information
SPIE Astronomical Telescopes and Instrumentation(Orlando, FL)
Distribution Limits
Public
Copyright
Other
Keywords
submillimeter spectrometer
transition-edge sensor
far-IR spectrometer
Si3N4 thermal transport