NDLI: Measurements of the Optical Performance of Prototype TES Bolometers for SAFARI

Content Provider	Springer Nature Link
Author	Audley, M. D. Lange, G. Ranjan, M. Gao, J. R. Khosropanah, P. Ridder, M. L. Mauskopf, P. D. Morozov, D. Doherty, S. Trappe, N. Withington, S.
Copyright Year	2013
Abstract	We have measured the optical response of prototype 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 over the wavelength range 34–210 μm. Each horn-coupled bolometer consists of a transition edge sensor (TES), with a transition temperature close to 100 mK, and a thin-film Ta absorber on a thermally-isolated silicon nitride membrane. SAFARI requires extremely sensitive detectors (NEP∼2×10$^{−19}$ W/ $\sqrt{\mathrm{Hz}}$ ), with correspondingly low saturation powers (∼5 fW), 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 based on a cryogen-free high-capacity dilution refrigerator, paying careful attention to stray-light exclusion, shielding, and vibration isolation. For optical measurements the system contains internal cold (3–30 K) and hot (∼300 K) black-body calibration sources, as well as a light pipe for external illumination. We discuss our measurements of high optical efficiency in prototype SAFARI detectors and describe recent improvements to the test facility that will enable us to test the full SAFARI focal-plane arrays.
Starting Page	755
Ending Page	760
Page Count	6
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	176
Issue Number	5-6
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2013-11-26
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Low-temperature detectors Infra-red bolometers Transition edge sensors Optical testing Condensed Matter Physics Characterization and Evaluation of Materials Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Effect of Magnetic Fields on TiAu TES Bolometers for the SAFARI Instrument on the SPICA FIR Telescope

Distributed TES Model for Designing Low Noise Bolometers Approaching SAFARI Instrument Requirements

Introduction to TES Physics

Comparison of the Effects of Magnetic Field on Low Noise MoAu and TiAu TES Bolometers

Low-Noise Readout of TES Detectors with Baseband Feedback Frequency Domain Multiplexing

Fabrication of Low-Noise TES Arrays for the SAFARI Instrument on SPICA

Progress Towards Improved Analysis of TES X-ray Data Using Principal Component Analysis

AC Bias Characterization of Low Noise Bolometers for SAFARI Using an Open-Loop Frequency Domain SQUID-based Multiplexer Operating Between 1 and 5 MHz

Performance of a Low-Noise Test Facility for the SAFARI TES Bolometer Arrays

Measurements of the Optical Performance of Prototype TES Bolometers for SAFARI

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Effect of Magnetic Fields on TiAu TES Bolometers for the SAFARI Instrument on the SPICA FIR Telescope

Distributed TES Model for Designing Low Noise Bolometers Approaching SAFARI Instrument Requirements

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Comparison of the Effects of Magnetic Field on Low Noise MoAu and TiAu TES Bolometers

Low-Noise Readout of TES Detectors with Baseband Feedback Frequency Domain Multiplexing

Fabrication of Low-Noise TES Arrays for the SAFARI Instrument on SPICA

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