耐放射線磁気軸受形複合分子ポンプの開発

概要

論文の詳細を見る
The Magnetically Suspended Compound Molecule Pump is used for the vacuum pumping system in 3 GeV Rapid Cycle Synchrotron (3 GeV-RCS) of Japan Proton Accelerator Research Complex (J-PARC). The pump is demanded a permissible radiation of 10 MGy or more because of operating under the radiation environment. The standard Magnetically Suspended Compound Molecular Pump (TG1300M) is able to operate to only 3.5 MGy under the radiation environment. Therefore, the radiation-hardened Magnetically Suspended Compound Molecular Pump (TG1300MR) was developed based on the result of gamma rays irradiation examination of TG1300M, and irradiation test was done. TG1300MR had a failure of matching error on operation at 34.3 MGy, but it satisfied 10 MGy of 3 GeV-RCS demand doses of radiation enough. As result of disassembly check, cause of the failure is the faulty operation due to the decreased insulation of a connector for magnetic suspension. And every other parts, such as the position sensor, the electromagnet and the motor are with no problem. It means that TG1300MR is able to work under the radiation environment above 34.3 MGy, if the connector for magnetically suspension is improved.
日本真空協会の論文
2007-06-20