The modeling of atom – neutral collisions for beam emission spectroscopy applications⋆
Institute of Nuclear Techniques, Budapest University of Technology and Economics, Muegyetem rkpt 3, 1111 Budapest, Hungary
2 Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), 4001 Debrecen, Hungary
3 ELI-ALPS, ELI-HU Non-profit Ltd., Dugonics ter 13, 6720 Szeged, Hungary
4 Wigner RCP, Hungarian Academy of Science, 1121 Konkoly-Thege Miklos 29-33, Budapest, Hungary
a e-mail: firstname.lastname@example.org
Received in final form: 11 March 2019
Published online: 1 June 2019
The collisional radiative models used in the modeling of beam emission spectroscopy diagnostics neglect atom–atom collisions because of a lack of sufficiently detailed atomic data. Filling this scantiness we performed a classical trajectory Monte Carlo simulations to calculate the cross sections for various channels in collisions between H + H2 and Li + H2 for a wide range of projectile energies. Based on the calculated cross sections, a simplified version of the collisional radiative model has been derived. We show that the model is suitable to obtain the beam attenuation in neutral gases outside of the confined plasma region. A strong density dependence has been found for each beam species.
Key words: Atomic and Molecular Collisions
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