Abstract
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.
| Original language | English (US) |
|---|---|
| Title of host publication | 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012 |
| Pages | 189-197 |
| Number of pages | 9 |
| State | Published - 2012 |
| Event | 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012 - Tokyo, Japan Duration: Apr 2 2012 → Apr 4 2012 |
Other
| Other | 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012 |
|---|---|
| Country | Japan |
| City | Tokyo |
| Period | 4/2/12 → 4/4/12 |
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Keywords
- Bolometers
- Calibration
- Immunity testing
- Infrared detectors
- Superconducting devices
ASJC Scopus subject areas
- Computer Networks and Communications
Cite this
Optical measurements of TES bolometers for SAFARI. / Audley, Michael D.; Detrain, Axel; Ferrari, Lorenza; Gao, Jian Rong; Hayton, Darren; De Lange, Gert; Mauskopf, Philip; Morozov, Dmitry; Trappe, Manisha Ranjan Neil A; Vreeling, Willem Jan.
23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012. 2012. p. 189-197.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
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
Y1 - 2012
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
SN - 9781627481113
SP - 189
EP - 197
BT - 23rd International Symposium on Space Terahertz Technology 2012, ISSTT 2012
ER -