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Ablation-erosion analyses of various fusion material surfaces and developments of surface erosion monitors for notification of fusion chamber maintenance times, as an example: Visible light transparent SiC and up-conversion phosphors applied to plasma facing surface structures, useful for versatile purposes to protect and diagnose fusion chambers and so on
Author(s): K. Kasuya; S. Motokoshi; S. Taniguchi; M. Nakai; K. Tokunaga; K. Kolacek; J. Schmidt; O. Frolov; J. Straus; J. Matejicek; A. Choukourov
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Paper Abstract

Two kinds of pulsed lasers in Japan and Czech Republic were used to irradiate various sample materials to investigate the surface erosion thresholds under very hazardous environments including nuclear fusion chambers. The first was ArF laser in ILT and the second was XUV laser in IPP. These data were in-cooperated with our former data to build up our material strength data for our succeeding applications of various materials to a variety of fields. As an example, we proposed surface erosion monitors to notice the fusion chamber maintenance times with which the facilities can be protected from the collapses under very severe operation conditions. These kinds of monitors are expected to be useful for future different kinds of mechanical structures not only for the fusion chambers but also various chambers for many purposes. Special upconversion phosphors are also newly proposed to be used as the candidate materials to measure the thermal inputs onto the front surfaces of the armor structures. Optical transparent SiC was also newly tested to enrich our data base for our future diagnostic and protection possibilities.

Paper Details

Date Published: 13 January 2017
PDF: 6 pages
Proc. SPIE 10254, XXI International Symposium on High Power Laser Systems and Applications 2016, 102541B (13 January 2017); doi: 10.1117/12.2256562
Show Author Affiliations
K. Kasuya, Institute of Laser Technology (Japan)
Institute of Applied Flow (Japan)
S. Motokoshi, Institute of Laser Technology (Japan)
S. Taniguchi, Institute of Laser Technology (Japan)
M. Nakai, Osaka Univ. (Japan)
K. Tokunaga, Kyushu Univ. (Japan)
K. Kolacek, Institute of Plasma Physics (Czech Republic)
J. Schmidt, Institute of Plasma Physics (Czech Republic)
O. Frolov, Institute of Plasma Physics (Czech Republic)
J. Straus, Institute of Plasma Physics (Czech Republic)
J. Matejicek, Institute of Plasma Physics (Czech Republic)
A. Choukourov, Charles Univ. of Prague (Czech Republic)

Published in SPIE Proceedings Vol. 10254:
XXI International Symposium on High Power Laser Systems and Applications 2016
Dieter Schuoecker; Richard Majer; Julia Brunnbauer, Editor(s)

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