Berlin 2005 – wissenschaftliches Programm
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MS: Massenspektrometrie
MS 4: Massenspektrometrische Verfahren
MS 4.4: Vortrag
Freitag, 4. März 2005, 17:30–17:45, HU 3088
Ion surface collisions with diamond surfaces — •Verena Grill1, T. Tepnual1, L. Feketeova1, H. Drexel2, D. Steinmüller2, P. Scheier1, Z. Herman3, and T.D. Märk1 — 1Institut für Ionenphysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria — 2r-BeSt coating HartstoffbeschichtungsGmbH Erlach 165, 6150 Steinach, Austria — 3J. Heyrevský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, CZ-182 23 Prague, Czech Republic
Ion/surface collisions have been performed using a homebuilt tandem mass spectrometer in the energy range of up to about 40 eV collision energy. Two diamond surfaces, one terminated in air and the other one in oxygen, have been compared with a standard stainless steel surface. As projectiles in all cases ethane ions produced in an electron impact ion source have been used. The collision energy resolved mass spectra (CERMS) of the secondary ions have been used to compare the influence of termination on the energy transfer, neutralization rate and fragmentation of the projectile ion. Collision data on diamond surfaces are important for modelling the behaviour of the plasma edge in fusion devices. Work supported by the FWF, Wien