Evidence for hydrogen flux dependence of the apparent chemical erosion yield of graphite under high flux conditions

A.Kallenbach; A.Thoma; A.Bard

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Evidence for hydrogen flux dependence of the apparent chemical erosion yield of graphite under high flux conditions

机译：高通量条件下石墨的表观化学侵蚀量与氢通量的相关性证据

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The erosion yield of carbon by chemical hydrocarbon generation is investigated using spectroscopic particle flux measurements in the divertor of the ASDEX Upgrade tokamak. The methane formation at graphite surface in hydrogen and deuterium plasmas is derived from CH/CD molecular band emission, and the corresponding hydrogenic fluxes are obtained from H_β/D_β Spectroscopy, supported by Langmuir probe measurements in many cases. Under conditions of high Particle flux densities above 10~22 m~-2.s~-1, which are typical for high recycling divertor operation, A strong decrease of the apparent chemical erosion yield derived from CH release with increasing Hydrogen flux density(and decreasing impact energy)is observed, Y_CH∝Γ~-0.8_H.

机译：使用ASDEX升级托卡马克分流器中的光谱粒子通量测量法研究了化学烃生成对碳的侵蚀收率。氢和氘等离子体中石墨表面的甲烷形成是由CH / CD分子带发射引起的，相应的氢通量是由H_β/D_β光谱学获得的，在许多情况下，该测量均受Langmuir探针测量的支持。在较高的颗粒通量密度高于10〜22 m〜-2.s〜-1的条件下（这是高循环分流器运行的典型条件），随着氢通量密度的增加，由CH释放而产生的表观化学侵蚀产量将大大降低（和观察到降低的冲击能量，Y_CH∝Γ〜-0.8_H。

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《Nuclear fusion》 |1998年第7期|p.1097-1103|共7页
作者
A.Kallenbach; A.Thoma; A.Bard;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类原子核物理学、高能物理学;
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2. Carbon chemical erosion in H-mode discharges in ASDEX Upgrade divertor IIb: flux dependence and local redeposition [J] . Pugno R, Krieger K, Kirschner A, Journal of Nuclear Materials: Materials Aspects of Fission and Fusion . 2005,第1a3期

机译：ASDEX升级分流器IIb中H模式放电中的碳化学侵蚀：流量依赖性和局部再沉积
3. Flux dependence of carbon chemical erosion by deuterium ions [J] . J. Roth, R. Preuss, W. Bohmeyer, Nuclear fusion . 2004,第11期

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4. FLUX DEPENDENCE AND ISOTOPE EFFECT OF THE CHEMICAL EROSION OF CARBON UNDER TOKAMAK CONDITIONS [C] . A. KALLENBACH, A. BARD, K. KRIEGER, Fusion energy 1998 . 1998

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5. Chemical erosion of graphite due to simultaneous hydrogen ion and oxygen ion irradiation. [D] . Chen, Allen Y. K. 2001

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Evidence for hydrogen flux dependence of the apparent chemical erosion yield of graphite under high flux conditions

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