<RESEARCH REPORT>Simulation of Tokamak Runaway-Electron Events-Study of the Response of Materials by Use of an Electron Linear Accelerator

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概要

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• High energy runaway-electron events which can occur in tokamaks when the plasma hits the first wall are a critical issue for the materials selection of future devices. Runaway-electron events are simulated with an electron linear accelerator to better understand the observed runaway-electron damage to tokamak first wall materials and to consider the runaway-electron issue in further materials development and selection. The electron linear accelerator produces beam energies of 20 to 30 MeV at an integrated power input of up to 1.3kW. Graphite, SiC + 2%AlN, stainless steel, molybdenum and tungsten have been tested as bulk materials. To test the reliability of actively cooled systems under runaway-electron impact layer systems of graphite fixed to metal substrates have been tested. The irradiation resulted in damage to the metal compounds but left graphite and SiC + 2%AlN without damage. Metal substrates of graphite-metal systems for actively cooled structures suffer severe damage unless thick graphite shielding is provided.

• 核融合科学研究所の論文

著者

• Yamamoto T.

  Inst. of Mat. Sci., University of Tsukuba

• Miyahara A.

  Inst. Of Plasma Physics Nagoya University

• Bolt H.

  Inst. of Plasma Physics, Nagoya University; on leave from Inst. for Reactor Materials, Kernforschung

• Miyake M.

  Dept. of Nuclear Engineering, Osaka University

• Bolt H.

  Inst. Of Plasma Physics Nagoya University; On Leave From Inst. For Reactor Materials Kernforschungsa

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• Simulation of Tokamak Runaway-Electron Events-Study of the Response of Materials by Use of an Electron Linear Accelerator

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