An Analytical Expression for the Electric Field and Particle Tracing in Modelling of Be Erosion Experiments at the JET ITER-like Wall

0466112 - ÚFP 2017 RIV DE eng J - Journal Article
Borodkina, I. - Borodin, D. - Kirschner, A. - Tsvetkov, I.V. - Kurnaev, V.A. - Komm, Michael - Dejarnac, Renaud
An Analytical Expression for the Electric Field and Particle Tracing in Modelling of Be Erosion Experiments at the JET ITER-like Wall.
Contributions to Plasma Physics. Roč. 56, 6-8 (2016), s. 640-645. ISSN 0863-1042. E-ISSN 1521-3986.
[International Workshop on Plasma Edge Theory in Fusion Devices (PET) 2015/15./. Nara, 09.09.2015-11.09.2015]
Institutional support: RVO:61389021
Keywords : Plasma-surface interaction * JET * ITER-like wall * beryllium * erosion * ERO code * magnetic pre-sheath * the Debye sheath * oblique magnetic field * electric field * sputtering
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.440, year: 2016

A new analytical approximation for the electric potential profile in the presence of an oblique magnetic field and the analytical solution for the particle motion just before the impact with a plasma-facing surface are presented. These approximations are in good agreement with fluid solutions and the corresponding PIC simulations. These expressions were applied to provide effective physical erosion yields for Be, which have in a second step been used in ERO code simulations of spectroscopy at Be limiters of the JET ITER-like wall. These new analytical expressions lead to an increase of the effective physical sputtering yields of Be by deuteron impact up to 30% in comparison with earlier pure numerical simulations
Permanent Link: http://hdl.handle.net/11104/0264516