真空用Ｏリソグのγ線による劣化具合の調査

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タイトル別名
  • Research on Degradation of Vacuum O-rings under gamma Radiation
  • シンクウヨウ Oリング ノ ガンマセン ニ ヨル レッカ グアイ ノ チョウサ

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抄録

The high-intensity proton accelerator being constructed by JAERI and KEK will generates greater beam power than conventional accelerators. The radiation emission due to beam losses will therefore increase. Since vacuum O-rings installed in the accelerator will be degraded badly by the radiation, there is need to find an O-ring that has more resistant to radiation. To find an O-ring that has better radiation resistant than that of the fluororubber used for conventional accelerators in general, some O-rings which are expected to have enough resistant to the radiation were irradiated, and estimated a degradation by measurement of outgassing rate, hardness, permeation time of helium gas, and an outward observation. Most of the O-rings were irradiated in an oxygen free atmosphere and in the air. The irradiations were carried out at room temperature in Co-60 gamma irradiation facility until a dose of 1 MGy was reached. The radiation resistance of PURE-UBBER O-ring showed somewhat better than that of the fluororubber O-ring.

収録刊行物

  • 真空

    真空 46 (5), 397-401, 2003

    一般社団法人 日本真空学会

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