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G. Kowarik, M. Brunmayr, F. Aumayr:
"Electron emission from tungsten induced by slow, fusion-relevant ions";
Nuclear Instruments & Methods in Physics Research Section B, 267 (2009), 2634 - 2637.

Tungsten has recently been introduced as a new wall material for fusion, because it exhibits favourably
low sputtering yields and a very low tritium retention as compared to the commonly used graphite wall
and divertor tiles. We measure total electron emission yields due to impact of slow singly and multiply
charged ions (deuterium, helium and carbon) on sputter-cleaned polycrystalline tungsten surfaces by
using a current method in combination with a retarding grid. Results are presented in the eV to keV
impact energy region as typical for fusion edge plasma conditions and discussed in terms of potential
and kinetic electron emission.
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