TY - GEN
T1 - Optical measurements of TES bolometers for SAFARI
AU - Audley, Michael D.
AU - Detrain, Axel
AU - Ferrari, Lorenza
AU - Gao, Jian Rong
AU - Hayton, Darren
AU - De Lange, Gert
AU - Mauskopf, Philip
AU - Morozov, Dmitry
AU - Trappe, Manisha Ranjan Neil A
AU - Vreeling, Willem Jan
PY - 2012/12/1
Y1 - 2012/12/1
N2 - We have measured the optical response of detectors for SAFARI, the far-infrared imaging spectrometer for the SPICA satellite. SAFARI's three bolometer arrays, coupled with a Fourier transform spectrometer, will provide images of a 2′×2′ field of view with spectral information in three bands covering the wavelength range 34 - 210 μm. Each bolometer consists of a transition edge sensor (TES) with a transition temperature close to 100 mK and a resistive absorber on a thermally-isolated silicon nitride membrane. Each detector sits behind a concentrating horn and in front of a hemispherical backshort. SAFARI requires extremely sensitive detectors (NEP∼2×1019 W/√Hz) to take advantage of SPICA's cooled optics. To meet the challenge of testing such sensitive detectors we have constructed an ultra-low background test facility with a cryogen-free high-capacity dilution refrigerator, paying careful attention to stray-light exclusion. The SAFARI Detector System Test Facility provides a high degree of electrical, magnetic, and mechanical isolation for the detectors, allowing us to use a pulse-tube cooler to pre-cool the dilution refrigerator. We have verified the test facility's performance in terms of background power loading and carried out cross-calibrations with other test systems. The SAFARI Detector Test Facility is now being used for routine dark and optical measurements of ultra-sensitive TES bolometers. We report on optical measurements of prototype SAFARI detectors.
AB - We have measured the optical response of detectors for SAFARI, the far-infrared imaging spectrometer for the SPICA satellite. SAFARI's three bolometer arrays, coupled with a Fourier transform spectrometer, will provide images of a 2′×2′ field of view with spectral information in three bands covering the wavelength range 34 - 210 μm. Each bolometer consists of a transition edge sensor (TES) with a transition temperature close to 100 mK and a resistive absorber on a thermally-isolated silicon nitride membrane. Each detector sits behind a concentrating horn and in front of a hemispherical backshort. SAFARI requires extremely sensitive detectors (NEP∼2×1019 W/√Hz) to take advantage of SPICA's cooled optics. To meet the challenge of testing such sensitive detectors we have constructed an ultra-low background test facility with a cryogen-free high-capacity dilution refrigerator, paying careful attention to stray-light exclusion. The SAFARI Detector System Test Facility provides a high degree of electrical, magnetic, and mechanical isolation for the detectors, allowing us to use a pulse-tube cooler to pre-cool the dilution refrigerator. We have verified the test facility's performance in terms of background power loading and carried out cross-calibrations with other test systems. The SAFARI Detector Test Facility is now being used for routine dark and optical measurements of ultra-sensitive TES bolometers. We report on optical measurements of prototype SAFARI detectors.
KW - Bolometers
KW - Calibration
KW - Immunity testing
KW - Infrared detectors
KW - Superconducting devices
UR - http://www.scopus.com/inward/record.url?scp=84880549119&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84880549119&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84880549119
SN - 9781627481113
T3 - 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012
SP - 189
EP - 197
BT - 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012
T2 - 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012
Y2 - 2 April 2012 through 4 April 2012
ER -