Plasma and Fusion Research
Online ISSN : 1880-6821
Regular Articles
Assessment of Laser Transmission Mirror Materials for ITER Edge Thomson Scattering Diagnostics
Shin KAJITATakaki HATAEVladimir S. VOITSENYA
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2008 Volume 3 Pages 032

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Abstract

An assessment of in-vessel metallic mirror materials for the transmission of the laser beam used in the ITER edge Thomson scattering diagnostics is reported. The transient temperature increase due to the laser pulse irradiation on the laser transmission mirror is calculated by a one-dimensional heat conduction equation. Candidate mirror materials are discussed based on a comparison between the numerical calculation and current data relevant to the laser-induced damage threshold (LIDT). Gold, silver, and copper are considered promising because of its high reflectivity. The LIDT is evaluated considering multi-pulse effects and used to determine the necessary size for the laser transmission mirror for the ITER edge Thomson scattering diagnostics.

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© 2008 by The Japan Society of Plasma Science and Nuclear Fusion Research
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