Development of the superconducting gravimeter using a new type of diaphragm

作者：Ikeda H^*; Aoyama Y; Hayakawa H; Doi K; Shibuya K

来源：Physica C-Superconductivity and Its Applications, 2011, 471(21-22): 1543-1546.

DOI：10.1016/j.physc.2011.05.234

• Superconducting gravimeter
• Refrigerator
• Diaphragm
• Monitoring system
• Antarctica

During the period from December 2009 to February 2010, a new superconducting gravimeter with a cryocooler was installed to replace the former one at Syowa Station on the Antarctica. It has a high sensitivity of one nano-gal enabling measurement inside the Earth for the Global Geodynamics Project (GGP network). A new type of diaphragm was confirmed to well isolate the vibration from refrigerator cold-head and to prevent the solid air contamination perfectly. The Dewar refrigeration system consists of a newly designed Dewar interfaced with a cryocooler capable of obtaining temperatures below the vaporization point of liquid helium. The system is based on the Coolpower 0.1 W, 4.2 K cryocooler manufactured by Sumitomo Heavy Industries, Ltd. Real time remote monitoring system from Japan was also established. The recent large earthquake in the Republic of Chile was observed at Syowa Station with the superconducting gravimeter.

• 出版日期2011-11
• 单位中国极地研究中心