Recovery of Tungsten Surface with Fiber-Form Nanostructure by Plasmas Exposures

Takanori MIYAMOTO; Shuichi TAKAMURA; Hiroaki KURISHITA

doi:10.1088/1009-0630/15/2/17

Plasma Science and Technology > 2013 > 15(2): 161-165. > DOI: 10.1088/1009-0630/15/2/17

Takanori MIYAMOTO, Shuichi TAKAMURA, Hiroaki KURISHITA. Recovery of Tungsten Surface with Fiber-Form Nanostructure by Plasmas Exposures[J]. Plasma Science and Technology, 2013, 15(2): 161-165. DOI: 10.1088/1009-0630/15/2/17

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Recovery of Tungsten Surface with Fiber-Form Nanostructure by Plasmas Exposures

1 Department of Electrical Engineering, Faculty of Engineering, Aichi Institute of Technology, Toyota 470-0392, Japan 2 International Research Center for Nuclear Materials Science, IMR, Tohoku University, Oarai, Ibaraki 311-1313, Japan

Funds: supported by a Grant-in-aid for scienti¯c Research (B) (20360414) from JSPS

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Received Date: January 12, 2012

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Abstract

Abstract

One of the serious concerns for tungsten materials in fusion devices is the radiation defects caused by helium plasma irradiation since helium is a fusion product. The fiber-formed nanostructure is thought to have a possible weakness against the plasma heat flux on the plasma- facing component and also may destroy the reflectivity of optical mirrors. In this paper an inter esting method for the recovery of such tungsten surfaces is shown. The recovery process depends on the grade and manufacturing process of tungsten materials.
- helium defects,
- tungsten,
- plasma-surface interaction,
- fiber-form nanostruc- ture,
- surface recovery

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