Abstract
The calculations of total cross sections of electron capture in collisions of Cq+ with H(1s) are reviewed. At low collision energies, new calculations have been performed, using molecular expansions, to analyze isotope effects. The Classical Trajectory Monte Carlo method have been also applied to discuss the accuracy of previous calculations and to extend the energy range of the available cross sections.
Highlights
Carbon ions are one of the main impurities in present tokamak plasmas, where carbon composites are used in first wall tiles, specially in the divertor
Concluding remarks In this work we have reviewed the calculations of electron capture total cross sections in collisions of Carbon ions with H(D,T)(1s)
There exist several calculations for C6+ + H(1s) with different methods, few calculations have considered collisions of partially stripped ions, and the recommended data are based on experimental data, with the exception of C4++ H(1s); this system can be accurately described by employing a one-active electron treatment, and the agreement between different calculations is conspicuous
Summary
Carbon ions are one of the main impurities in present tokamak plasmas, where carbon composites are used in first wall tiles, specially in the divertor. It is known that these materials are not appropriate for D-T plasmas because of the tritium deposition problem, and it is planned that ITER first wall will be completely made of Be and W tiles. Small amounts of carbon impurities will be present in ITER, and it is possible that future devices will include materials which will release Cq+ ions. The importance of carbon impurities has stimulated many theoretical and experimental works on collisions of these ions with Hydrogen. The aim of the present work is to discuss the existing calculations on the EC reactions: Cq+ + H(1s) → C(q−1)+ + H+ The electron capture reactions (EC) were reviewed in 2006 by Suno and Kato [1]; they reviewed the bibliography and proposed a set of recommended data for both total and state-selective electron capture cross sections.
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