New weight-loss measurements of the chemical erosion yields of carbon materials under hydrogen ion bombardment
New weight-loss measurements of the chemical erosion yields of carbon materials under hydrogen ion bombardment
复制标题
氢离子轰击下碳材料化学侵蚀产率的新失重测量
DOI：
10.1016/s0022-3115(00)00031-3
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发表时间：
2000
影响因子：
3.1
通讯作者：
J. Roth
中科院分区：
文献类型：
--
作者：
M. Balden;J. Roth
本文给出了在300 ~ 1000 K温度范围内，用失重法测量的石墨和碳材料在氢和氘轰击下的总腐蚀产额。当离子能量为15 ~ 300 eV时，化学腐蚀最大值的温度从600 K以下升高到850 K以上。通过失重测量获得的化学侵蚀产率总是超过质谱测量的产率约2倍。收集器实验表明，一小部分被侵蚀的颗粒粘在壁上，因此降低了通过质谱法测量的产率。可以排除离子束中中性粒子对化学侵蚀产率的协同效应。
Total erosion yields of graphite and carbon materials under hydrogen and deuterium bombardment measured with the weight-loss method are presented for ion energies between 15 eV and 8 keV in the temperature range 300 to above 1000 K. The temperature of the maximum of the chemical erosion increases from below 600 to above 850 K with ion energies from 15 to 300 eV. Chemical erosion yields obtained by weight-loss measurements exceed yields measured mass-spectrometrically always by a factor of about two. Collector experiments show that a fraction of the eroded particle sticks to walls and, therefore, reduces the yield measured by mass spectrometry. A synergistic effect of neutrals in the ion beam on the chemical erosion yield can be excluded.