Data for Beryllium–Hydrogen Charge Exchange in One and Two Centres Models, Relevant for Tokamak Plasmas

Symmetry

Sergei N. Tugarinov¹  Valery S. Lisitsa²  Alexander B. Kukushkin²  Petr A. Sdvizhenskii²  Inga Yu. Tolstikhina³ 

[1] Institution “Project Center ITER”, 123182 Moscow, Russia;National Research Center “Kurchatov Institute”, 123182 Moscow, Russia;P. N. Lebedev Physical Institute, 119991 Moscow, Russia;

关键词: charge exchange;    cross section;    tokamak plasmas;    spectroscopy;   

DOI  :  10.3390/sym13010016

来源: DOAJ

【 摘 要 】

Data on the cross section and kinetic rate of charge exchange (CX) between the bare beryllium nucleus, the ion Be(+4) and the neutral hydrogen atom are of great interest for visible-range high-resolution spectroscopy in the ITER tokamak because beryllium is intended as the material for the first wall in the main chamber. Here an analysis of available data is presented, and the data needs are formulated. Besides the active probe signal produced by the CX of the diagnostic hydrogen neutral beam with impurity ions in plasma, a passive signal produced by the CX of impurity ions with cold edge plasma is also important, as it shows in observation data from the JET (Joint European Torus) tokamak with an ITER-like beryllium wall. Data in the range of a few eV/amu to ~100 eV/amu (amu stands for the atomic mass unit) needed for simulations of level populations for principal and orbital quantum numbers in the emitting beryllium ions Be(+3) can be obtained with the help of two-dimensional kinetic codes. The lack of literature data, especially for data resolved in orbital quantum numbers, has instigated us to make numerical calculations with the ARSENY code. A comparison of the results obtained for the one-centre Coulomb problem using an analytic approach and for the two-centre problem using numerical simulations is presented.

【 授权许可】

Unknown