Operation of TEXTOR-94 with tungsten poloidal main limiters
Operation of TEXTOR-94 with tungsten poloidal main limiters
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DOI：
10.1016/s0022-3115(00)00656-5
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发表时间：
2001-03
影响因子：
3.1
通讯作者：
A. Pospieszczyk;T. Tanabe;V. Philipps;G. Sergienko;T. Ohgo;K. Kondo;M. Wada;M. Rubel;W. Biel;A. Huber;A. Kirschner;J. Rapp;N. Noda
中科院分区：
文献类型：
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作者：
A. Pospieszczyk;T. Tanabe;V. Philipps;G. Sergienko;T. Ohgo;K. Kondo;M. Wada;M. Rubel;W. Biel;A. Huber;A. Kirschner;J. Rapp;N. Noda
在TEXTOR-94中，已经用由气相喷涂（VSP）钨（约0.5mm）沉积在石墨上并具有石墨夹层的上部和下部极向限制器块进行了实验。已经执行了一系列放电条件（密度扫描、辅助加热功率扫描、半径扫描）。已经发现在任何密度下使用辅助加热操作都没有限制。对于欧姆条件，可以达到与测试限制器相同的密度。在硅化的条件下，没有严重的积累钨在等离子体中心可以检测到。这些块体通常可以承受低于1700 K的表面温度。它们中的大多数在3000 K以上的温度下也没有剥落。然而，一些块显示出可能由于钨层与石墨的接触不充分而通过熔化或剥落的严重损坏。
In TEXTOR-94, experiments have been performed with the upper and lower poloidal limiter blocks made of vapour sprayed (VSP) tungsten (about 0.5 mm) deposited on graphite with a rhenium interlayer. A series of discharge conditions have been performed (density scan, scan of the auxiliary heating power, radius scan). There has been found no restriction for operation at any density with auxiliary heating. For Ohmic conditions the same density with testlimiters could be reached. Under siliconized conditions no severe accumulation of tungsten in the plasma centre could be detected. The blocks could in general stand surface temperatures below 1700 K. Most of them survived also temperatures above 3000 K without exfoliation. However, some blocks showed severe damage by melting or exfoliation probably due to insufficient contact of the tungsten layer with the graphite.