摘要
文章提出一种利用等离子体鞘层加速模拟质子辐照的新方法。在真空室中通过射频-电感耦合的方法产生氢等离子体,将脉冲负高压施加在热控涂层样品上,利用氢等离子体鞘层加速技术实现样品的质子辐照,并研究了质子辐照对聚酰亚胺(Kapton)薄膜光学透过率、表面形貌以及表层化学结构的影响。结果表明:质子辐照后,样品的透过率下降,脉冲电压值越高和辐照时间越长,则透过率下降越多;AFM结果显示,样品表面"手指状"突起随着脉冲电压的增加呈现先增加后变化较小的趋势;XPS分析表明,辐照后样品的化学结构发生了变化,包括C—N键、C—O键以及C=O键的断裂,以及一些新键的形成。
A new technique is proposed to simulate proton irradiation using plasma sheath acceleration.The hydrogen ions（H＋）are produced in a vacuum chamber by inductance-coupled radio-frequency discharge.A high negative voltage is applied to samples on the target holder to produce H＋ ion irradiation.The optical transmissivity,surface morphology,and chemical structure of Polyimide（Kapton） samples are determined by UV-VIS-NIR scanning spectrophotometer,AFM and XPS analyses,respectively.The results show that the transmissivity of the Kapton films decreases with the increase of the amplitude of the high voltage pulses and the irradiation time.The number of finger-like bulges firstly increases and then decreases,accompanied with chemical structure changes,including the bond breaking of the carbonyl and aromatic ether,ring opening of cyclic imide,and the formation of some new bonds and structures.
出处
《航天器环境工程》
2011年第1期15-20,共6页
Spacecraft Environment Engineering
基金
国家自然科学基金资助项目(项目编号:50773015)
关键词
等离子体鞘层加速
质子辐照
聚酰亚胺薄膜
光学透过率
表面形貌
化学结构
plasma sheath acceleration
proton irradiation
Kapton film
optical transmissivity
surface morphology
chemical structure
