Performance test of Ti/Au bilayer TES microcalorimeter in combination with continuous ADR
- Department of Physics, Tokyo Metropolitan University 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397 (Japan)
- Tsukuba Magnet Laboratory, NIMS, 3-13 Sakura, Tsukuba 305-0003 (Japan)
- Faculty of Mathematics and Physics, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192 (Japan)
- Aerospace Research and Development Directorate, JAXA, 1-1 Sengen, Tsukuba, Ibaraki 305-8505 (Japan)
- Institute of Space and Astronautical Science, JAXA, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 (Japan)
- NASA/Goddard Space Flight Center (GSFC), Greenbelt, MD 20771 (United States)
Performance test of a Ti/Au bilayer TES microcalorimeter has been made in combination with a continuous adiabatic demagnetization refrigerator (CADR). The CADR has four stages of ADR to produce continuous cooling by recycling them in dedicated order, and is cryogen-free utilizing a 4K-GM refrigerator. We installed a Ti/Au bilayer TES microcalorimeter and 420-series SQUID array to readout the X-ray signal on the 1st (coldest) stage of the CADR. We successfully operated the CADR at temperature of 120 mK in continuous mode more than 27 hr, however, FWHM energy resolution of the TES microcalorimeter was degraded to 45 eV at 6 keV, as compared to 10 eV when measured in a dilution refrigerator. This is mainly because the temperature stability was not good enough (about 0.6 mK) and the operation temperature was not sufficiently lower than the transition temperature T{sub c} = 135mK of the TES. We operated the TES microcalorimeter at the operation temperature of 105 mK in one-shot mode and the resolution was improved to 30 eV. We also found that the operating point of the TES was affected by the magnetic field of the 3rd and 4th ADR recycle. More complete shielding of the magnetic field is essential for further improvement of the performance of the TES microcalorimeter.
- OSTI ID:
- 21325810
- Journal Information:
- AIP Conference Proceedings, Vol. 1185, Issue 1; Conference: LTD13: 13. international workshop on low temperature detectors, Stanford, CA (United States), 20-24 Jul 2009; Other Information: DOI: 10.1063/1.3292373; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADIABATIC DEMAGNETIZATION
CALORIMETERS
CALORIMETRY
CRYOGENICS
ENERGY RESOLUTION
GOLD
KEV RANGE
LAYERS
MAGNETIC FIELDS
PERFORMANCE
RADIATION DETECTORS
READOUT SYSTEMS
SHIELDING
SIGNALS
SQUID DEVICES
TITANIUM
TRANSITION TEMPERATURE
X-RAY DETECTION