Premium
Contribution to Calculation of Ion Microfield Nonuniformity Effect on the Asymmetry of Lyman‐ α Line in Dense Plasma
Author(s) -
Chenini K.,
Khelfaoui F.,
Guerricha S.,
Chihi S.,
Ouahhab A.,
Meftah M. T.
Publication year - 2011
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201000025
Subject(s) - asymmetry , physics , ion , plasma , line (geometry) , tensor (intrinsic definition) , stark effect , atomic physics , distribution function , electric field , monte carlo method , electron , coupling (piping) , computational physics , materials science , quantum mechanics , statistics , geometry , mathematics , pure mathematics , metallurgy
The high orders of Stark effects on spectral line shapes are examined in the ion‐static and electron‐impact ap‐proximations. At first the distribution functions of the spatial derivative of the ion microfield in He + plasma are calculated for different plasma conditions when the coupling parameter is weak. We present new results about the spatial derivative ion microfield distributions and apply them to show the asymmetry of the Lyman‐ α (Ly‐ α ) line in He + plasma. At the second stage we show that asymmetry is affected by the spatial derivative tensor of the local ion electric field. We have used the Monte‐Carlo simulation (MCS) to compute the distribution functions for all tensor components and use them to solve the evolution equation of emitter whose solution serves to compute and therefore to show the line shape asymmetry. Good agreement of our distribution functions of ion microfield gradients and the line asymmetry with other results are obtained (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)