Revisiting the Stark Broadening by fluctuating electric fields using the Continuous Time Random Walk Theory
Abstract
Stark broadening of atomic lines in plasmas is calculated by modelling the plasma stochastic electric field using the CTRW approach [1,2]. This allows retaining non Markovian terms in the Schrödinger equation averaged over the electric field fluctuations. As an application we consider a special case of a non separable CTRW process, the so called Kangaroo process [3]. An analytic expression for the line profile is presented for arbitrary waiting time distribution functions. A preliminary application to the hydrogen Lyman α line is discussed.
 Publication:

20th International Conference on Spectral Line Shapes
 Pub Date:
 October 2010
 DOI:
 10.1063/1.3517538
 Bibcode:
 2010AIPC.1290..104C
 Keywords:

 Stark broadening;
 spectral line broadening;
 Markov processes;
 stochastic processes;
 32.60.+i;
 33.70.Jg;
 02.50.Ga;
 02.50.Fz;
 Zeeman and Stark effects;
 Line and band widths shapes and shifts;
 Markov processes;
 Stochastic analysis