Author/Authors :
Klimov، نويسنده , , N. and Podkovyrov، نويسنده , , V. and Zhitlukhin، نويسنده , , A. and Kovalenko، نويسنده , , D. and Bazylev، نويسنده , , B. and Janeschitz، نويسنده , , G. and Landman، نويسنده , , I. and Pestchanyi، نويسنده , , S. and Federici، نويسنده , , G. and Loarte، نويسنده , , A. and Merola، نويسنده , , M. and Linke، نويسنده , , J. and Hirai، نويسنده , , T. and Compan، نويسنده , , J.، نويسنده ,
Abstract :
This paper is concerned with investigation of an erosion of the ITER-like divertor castellated targets of pure tungsten, lanthanum tungsten and CFC under plasma heat loads expected during the Type I ELMs and disruptions in ITER. These experiments were carried out on a plasma gun QSPA-T at the SRC RF TRINITI under EU/RF collaboration. The targets were exposed by series repeated plasma pulses with heat loads in the range of 0.2–2.5 MJ/m2 and a pulse duration of 0.5 ms. The erosion value as a function of pulse number and energy density were obtained. The erosion of lanthanum tungsten started at the lower energy density as compared with pure tungsten and was mainly due to a melt layer movement and a droplets ejection. Characteristics of ejected droplets were measured. The erosion of CFC macrobrushes under ELM and disruption heat loads was determined mainly by damage of PAN-fibers.
