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Proceedings Paper

Development of superconducting voice coil motor of a cold chopper for MICHI
Author(s): Kiyoshi Mori; Takashi Miyata; Mitsuhiko Honda; Takafumi Kamizuka; Hidenori Takahashi; Shigeyuki Sako; Ryou Ohsawa; Kazushi Okada; Masahito S. Uchiyama; Hirokazu Kataza; Hiroyuki Ohsaki; Takashi Hiroe; Chris Packham
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Paper Abstract

A cold chopper is a key device for next generation mid-infrared instruments such as TMT/MICHI. It should achieve fast and accurate position switching with a large chopping throw at cryogenic temperature. To satisfy the requirements, voice coil motors using superconducting MgB2 wire have been developed. We have made a first prototype of the VCM and carried out its performance measurements such as a transition temperature, transfer functions, and power dissipation in the laboratory. The results are almost consistent with the expectations and the calculations, but some show significant inconsistency. We have also made a next prototype which is small to fit the size of the MICHI chopper. This will be installed to a developing mid-infrared instrument MIMIZUKU and used for actual observations.

Paper Details

Date Published: 22 July 2016
PDF: 8 pages
Proc. SPIE 9912, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II, 991218 (22 July 2016); doi: 10.1117/12.2231889
Show Author Affiliations
Kiyoshi Mori, The Univ. of Tokyo (Japan)
Takashi Miyata, The Univ. of Tokyo (Japan)
Mitsuhiko Honda, Kurume Univ. (Japan)
Takafumi Kamizuka, The Univ. of Tokyo (Japan)
Hidenori Takahashi, The Univ. of Tokyo (Japan)
Shigeyuki Sako, The Univ. of Tokyo (Japan)
Ryou Ohsawa, The Univ. of Tokyo (Japan)
Kazushi Okada, The Univ. of Tokyo (Japan)
Masahito S. Uchiyama, The Univ. of Tokyo (Japan)
Hirokazu Kataza, Japan Aerospace Exploration Agency (Japan)
Hiroyuki Ohsaki, The Univ. of Tokyo (Japan)
Takashi Hiroe, The Univ. of Tokyo (Japan)
Chris Packham, The Univ. of Texas at San Antonio (United States)
National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 9912:
Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation II
Ramón Navarro; James H. Burge, Editor(s)

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