An Analytical Expression for the Electric Field and Particle Tracing in Modelling of Be Erosion Experiments at the JET ITER‐like Wall. Issue 6 (24th June 2016)

• Record Type: Journal Article
• Authors: Borodkina, I.; Borodin, D.; Kirschner, A.; Tsvetkov, I.V.; Kurnaev, V.A.; Komm, M.; Dejarnac, R.; JET Contributors,
• Is Part Of: Contributions to plasma physics. Volume 56:Issue 6/8(2016)
• Page Start: 640
• Page End: 645
• Publication Date: 2016-06-24
• Subjects: Plasma‐surface interaction -- JET, ITER‐like wall -- beryllium, erosion -- ERO code -- magnetic pre‐sheath -- the Debye sheath -- oblique magnetic field -- electric field -- sputtering; Plasma (Ionized gases) -- Periodicals; Electronic journals; 530.44
• DOI: 10.1002/ctpp.201610032
• Languages: English
• ISSNs: 0863-1042

Abstract

Abstract: 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. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)