Refurbishment and Performance of the Superconducting Gravimeter CT-36
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- Ikeda Hiroshi
- Research Facility Center for Science and Technology, University of Tsukuba
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- Nawa Kazunari
- Geological Survey of Japan, AIST
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- Imanishi Yuichi
- Earthquake Research Institute, The University of Tokyo
Bibliographic Information
- Other Title
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- 超伝導重力計CT-36 の改修作業とその特性評価
- チョウデンドウ ジュウリョクケイ CT-36 ノ カイシュウ サギョウ ト ソノ トクセイ ヒョウカ
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Abstract
We started a superconducting gravimeter observation to elucidate relationships between slow slip events and gravity changes at Ishigakijima near Ryukyu trench, southwestern Japan in February 2012. Before the installation of the superconducting gravimeter (CT-36) at Ishigakijima, we refurbished the CT-36, installed at the Inuyama observatory of Nagoya University originally, so that the system can operate reliably at such a remote island. Specifically, for the planned observation, we replaced the compressor for the refrigerator from ‘water-cooled’ type to ‘air-cooled’ type. In addition, at University of Tsukuba, we warmed up the Dewar to room temperature to remove the ‘clogs’ inside it. This resulted in eliminating strange behaviors in the temperature controls of the gravimeter, as well as solving the problem in transferring liquid helium into the Dewar. During these refurbishment processes, the frequency responses and the instrumental drift of CT-36 were also measured. As a result, it was verified that CT-36 works ideally as a high-precision long-term gravimeter.
Journal
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- Journal of the Geodetic Society of Japan
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Journal of the Geodetic Society of Japan 59 (2), 25-36, 2013
The Geodetic Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679044014848
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- NII Article ID
- 10031190164
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- NII Book ID
- AN00134900
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- ISSN
- 2185517X
- 00380830
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- NDL BIB ID
- 024839359
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed