日本地球惑星科学連合2018年大会

講演情報

[EJ] Eveningポスター発表

セッション記号 S (固体地球科学) » S-GD 測地学

[S-GD01] 重力・ジオイド

2018年5月23日(水) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 7ホール)

コンビーナ:Takayuki Miyazaki(Geospatial Information Authority of Japan)、山本 圭香(国立天文台)

[SGD01-P01] 反磁性体を用いた相対重力計のデザインについて

*今西 祐一1高森 昭光1 (1.東京大学地震研究所)

キーワード:磁気浮上、反磁性、重力計

Most of the currently available relative gravimeters are based on mechanical spring suspension. Magnetic levitation is a promising method for replacing the principle of suspension in the relative gravimeters, being free from the problems inherent to mechanical springs. The superconducting gravimeter, manufactured by GWR Instruments, is an example of such instruments that utilizes magnetic suspension, and achieves very high sensitivity and stability in a cryogenic environment. General diamagnetic (not superconducting) materials can also be used to realize magnetic levitation at room temperature; it is possible either to levitate a permanent magnet stably with the aid of diamagnetic support or to levitate a diamagnetic material stably with permanent magnets. We will discuss basic ideas and feasibility of relative gravimeters based on magnetic suspension, and present some preliminary results of numerical simulations for designing a gravity sensor with diamagnetism.