| Project/Area Number |
09440092
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Institute of Space and Astronautical Science |
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Principal Investigator |
MITSUDA Kazuhisa Institute of Space and Astronautical Science, High Energy Astrophysics, Professor, 宇宙圏研究系, 教授 (80183961)
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| Co-Investigator(Kenkyū-buntansha) |
HIROSE Kazuyuki Institute of Space and Astronautical Science, High Energy Astrophysics, Associate Professor, 衛星応用工学系, 助教授 (00280553)
FUJIMOTO Ryuichi Institute of Space and Astronautical Science, High Energy Astrophysics, Research Associate, 宇宙圏研究系, 助手 (20280555)
SHOJI Shuji Waseda University, School of Science and Engineering, Professor, 理工学部, 教授 (00171017)
SHIMIZU Hirohiko Institute of Chemical Research, Senior Research Staff, 理化学研究所, 研究員 (50249900)
MURAKAMI Hiroshi Institute of Space and Astronautical Science, High Energy Astrophysics, Professor, 宇宙圏研究系, 教授 (40135299)
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| Project Period (FY) |
1997 – 2000
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| Keywords | Detectors / X-ray / infrared / Spectrometer / Superconductors / microcalorimeters / bolometers / SQUID / SQUID array amp. / Imaging / micromachining |
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| Research Abstract |
We studied new approaches to develop imaging microcalorimeters. We fabricated test models to confirm the new ideas experimentally. Major results are summarized below.
(1) Micrormachine processing to fabricate microcalorimeter pixel structures
We developed processes suited for imaging device. Finally we succeeded to fabricate calorimeter pixels with dry processes alone.
(2) Fabrication of X-ray absorber on the calorimer pixel with micromachine processing
We developed new processes utilizing plating to fabricate X-ray absorbers of "mushroom structure" which covers the calorimeter pixels with high covering efficiencies.
(3) Ti-Au bilayer TES thermometers
In our calorimeters, the temperature is sensed by the superconducting transition edge sensors (TES). We developed TES with Ti-Au bilayer membrane.
(4) Microcalorimeter imaging readout system
Number of signal lines allowed between the cryogenic to room temperatures is very limited. We developed a new method to multiplex calorimeter signals on frequency space. We developed a SQUID with multiple number of input coils and experimentally proved our new approach with a two-pixel calorimeter.
(5) Evaluation of the X-ray microcalorimeters
We evaluated the energy resolution of our X-ray microcalorimeter operating at 200 mK.The energy resolution was 99 eV.This is not good enough. We studied the extra noise factors which limit our resolutions.
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