Study of High Temperature Damages for The Carbon Stripper Foil by Irradiation of High Current Negative Hydrogen Ion Beams

为解决高强度粒子加速器寿命短的问题，对脱碳箔进行了高温损伤研究。本研究已实现了2000K以上耐久性高的混合型碳剥离箔。对实验结果进行了总结。(1)采用大电流脱负离子束，实现了2500K以上的极高温条件。(2)在2000K左右的高温下，研究了其损伤（变形增长、厚度减小、针孔形成）。(3)在200小时的机器时间内，在稳定的光束条件下进行650keV大电流h离子束辐照。杂化型脱碳箔寿命超过1500K。(4)对几种汽提箔材料进行了比较；(a)市售碳箔(b)新开发的KEK混合型碳箔(c) SNS金刚石箔(d)市售金刚石箔。

The high temperature damage about carbon stripper foils has been studied to resolve the short lifetime problem on the high intensity particle accelerators,. This study has been realized hybrid type carbon stripper foils with high durability over 2000K.Results from the experiment are summarized blow.(1) By using the high current de negative ion beam, the very high temperature condition of over 2500K was realized.(2) The damages (growth of distortion, reduced thickness, formation of pin-hole) were studied with high temperature of around 2000K.(3) The irradiation by high current 650keV H-ion beam were executed with stable beam condition during the machine time of 200hours. And the hybrid type carbon stripper foil showed the long lifetime with over 1500K.(4) Comparison of several materials as stripper foil was carried out; (a) Commercially available carbon foil (b) Newly developed KEK hybrid type carbon foil (c) SNS diamond foil (d) Commercially available diamond foil.