Sputtering of tungsten and molybdenum
The relatively low sputtering yield and large thermal conductivity make refractory materials like molybdenum and tungsten attractive as limiter and/or divertor materials in fusion machines. One drawback is the high sensitivity of the plasma to heavy (high atomic number) impurities. This paper presents sputtering yield and reflection coefficient data obtained via computer simulation. Besides the sputtering of molybdenum and tungsten by deuterium and tritium, self-sputtering is also discussed. The cases of normal and oblique incidence of monoenergetic particle beams are demonstrated, and the real circumstances are modelled by impinging particles of Maxwellian energy distribution. The dependence of the self-sputtering yields on the incident angles is also displayed for a number of primary energies.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 183 (1991) pp. 19-24
Record Number: 199111170 / Last updated on: 1994-12-02
Original language: en
Available languages: en