超伝導重力計CT-36 の改修作業とその特性評価

• 池田 博

  筑波大学　研究基盤総合センター低温部門

• 名和 一成

  産業技術総合研究所　地質情報研究部門

• 今西 祐一

  東京大学　地震研究所

書誌事項

タイトル別名

• Refurbishment and Performance of the Superconducting Gravimeter CT-36
• 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

抄録

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.

収録刊行物

• 測地学会誌

  測地学会誌 59 (2), 25-36, 2013

  日本測地学会

詳細情報

• CRID: 1390282679044014848
• NII論文ID: 10031190164
• NII書誌ID: AN00134900
• DOI: 10.11366/sokuchi.59.25
• ISSN: 2185517X
• ISSN: 00380830
• NDL書誌ID: 024839359
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024839359
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可