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The first mirror (FM) samples made of polycrystal (PC) stainless steel (SS), molybdenum (Mo) and tungsten (W) were mounted at different locations in HT-7 tokamak to investigate the surface modifications caused by erosion and deposition. The optical transmission characteristics of first mirror samples were measured by a spectrophotometer. It was found that different irradiation environment had different influences on the first mirror surfaces, especially with wave antenna nearby. In addition, the erosion made the reflectivity of FM degrade to some extents as a whole. But the deposition on the mirror influences more than erosion does. Comparing the mirrors of SS, W and Mo, irradiated in the same environment, the W-mirror had the least changes in reflectivity with regularity, while the SS-mirror had most serious changes. 相似文献
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我厂是洗、炭、染联合型的洗毛厂。自建厂以来,地沟排水流失羊毛,采取多种措施也未能彻底解决。 为能既经济又方便地解决这一难题,根据我厂设备安装位置和地沟所处条件,成功地设计制造了一台捞毛机,该机主槽(1)用6毫米厚的钢板焊成。在主槽园弧的半径处开始,分成三段加工成网眼漏底。分段分别为φ8、φ12、φ16的孔,两侧封闭。主槽(1)与主框架 (4)安装为一体,主框架采用角钢和槽钢均可。φ250毫米的槽轮(2)与搅拌框架(3)和12毫米-15毫米的橡胶版(8)与主轴(9)安装而成。搅拌框架(3),用角钢焊接即可。用1.5千瓦速比为1:43的行星摆线减速机与φ… 相似文献
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