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Testing of plasma facing materials for divertors in the JET neutral-beam test bed

机译：在JET中性束测试台中测试偏向器的等离子饰面材料

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Abstract: Flat Beryllium tiles brazed to actively cooled CuCrZr withstand power densities up to 17 MW/m$+2$/. Tiles with 2 mm thickness have been cycled for 1000 pulses at power densities between 12 and 14 MW/m$+2$/. Flat CFC tiles brazed to OFHC copper failed at power densities of 13 MW/m$+2$/ with long (10 s) pulses. The fault developed from an area which showed signs of overheating from the start of the test and led to a complete detachment of one tile. For shorter pulse duration (2.5 s) higher power densities (17 MW/m$+2$/) could be applied. CFC cubes brazed around a central cooling pipe (monoblocks) have been tested to 15 MW/m$+2$/. The power density was limited by the peak surface temperature of the tiles, which exceeded 1500 - 2000$DGR@C. None of the tiles failed during the test, but there were considerable temperature variations from tile to tile. !9
机译：摘要：钎焊到主动冷却的CuCrZr的铍铍平铺砖承受的功率密度高达17 MW / m $ + 2 $ /。厚度为2 mm的瓷砖已在功率密度12到14 MW / m $ + 2 $ /之间循环了1000个脉冲。钎焊到OFHC铜上的扁平CFC瓷砖在功率密度为13 MW / m $ + 2 $ /的情况下以长脉冲（10 s）失败。从测试开始就从出现过热迹象的区域发展出故障，并导致一块瓷砖完全脱落。对于较短的脉冲持续时间（2.5 s），可以应用较高的功率密度（17 MW / m $ + 2 $ /）。铜焊在中央冷却管（整体式）周围的CFC立方体已被测试为15 MW / m $ + 2 $ /。功率密度受到瓷砖最高表面温度的限制，最高温度超过1500-2000 $ DGR @ C。在测试过程中，所有瓷砖均未发生故障，但各个瓷砖的温度变化相当大。 ！9

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