FEB偏滤器等离子体温度及靶板运行温度的优化

OPTIMIZATION ON THE TEMPERATURES OF DIVERTOR PLASMA AND DIVERTOR PLATE IN THE FEB

本文以石墨偏滤器靶板材料为例，用喷气或杂质注入对偏滤器靶板前等离子体温度进行控制，根据偏滤器等离子体的各种变标关系及石墨靶板被（物理溅射、化学溅射及辐射增强升华等过程）腐蚀的程度，优化了ＦＥＢ偏滤器靶板前等离子体温度和靶板运行温度。对于运行温度为１２００Ｋ，等离子体温度约为３２ｅＶ，靶板腐蚀速率可以控制在３ｃｍ／燃烧年以下。

Temperatures of the divertor plasma and the divertor plate are optimized according to various divertor plasma scaling laws and the degree of erosion (including physical sputtering, chemical sputtering and radiation enhanced sublimation etc.). In the case of graphite plate, if its operation temperature is 1200K and the plasma temperature near the plate is about 32eV, erosion rate of the plate can be controlled to be less than 3 cm/burn year.