Eur. Phys. J. D (2013) 67: 107
https://doi.org/10.1140/epjd/e2013-40043-4

Regular Article

Momentum transfer Cs⁺/H₂ cross section from an inversion of transport data

¹ Dipartimento di Chimica, Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy
² IMIP-CNR, Section of Bari, Via Amendola 122/D, 70126 Bari, Italy
³ INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy

^a e-mail: s.longo@chimica.uniba.it

Received: 25 January 2013
Received in final form: 15 March 2013
Published online: 16 May 2013

Abstract

Monte Carlo (MC) calculations of Cs⁺ transport in H₂ are performed in order to establish a reliable transport cross section for momentum transfer. This system is important for plasma modeling in the context of the negative ion source design proposed for plasma heating in future nuclear fusion reactors. Two procedures are checked: use of the Langevin approximation based on realistic values of the physical parameters and a purely statistical, multi-parameter function allowing for shape variation at relative high energy. The two alternatives are discussed and final results provided to be used for negative source modeling.