Abstract
He loading and subsequent nano-structure formation is a serious concern for the development of plasma facing materials. In a large device such as iter, plasma facing surfaces will be exposed to very high plasma fluences over the life of the machine, so understanding the long-term effects of this particle exposure on material performance is essential. In order to develop a better understanding of this phenomenon the fusion community will need access to advanced techniques beyond TEM. In this chapter, a study is discussed which investigates the role of He fluence on nano-bubble growth using GISAXS, providing unprecedented precision for nano-bubble diameter measurements. This work was performed on two separate linear plasma devices: the Australian National University’s MAGnetised Plasma Interaction Experiment (MAGPIE), and the University of California, San Diego’s PISCES-A device.
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