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Spectroscopic models for the characterization of energetic particle beams in tokamak edge plasmas
Author(s) -
Meireni Mutia,
Hannachi Ibtissem,
Rosato Joël,
Marandet Yannick,
Stamm Roland
Publication year - 2018
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.201700190
Subject(s) - tokamak , plasma , enhanced data rates for gsm evolution , characterization (materials science) , particle (ecology) , atomic physics , nuclear physics , physics , materials science , computational physics , optics , computer science , telecommunications , oceanography , geology
We examine the possibility for a diagnostic of energetic particle beams based on passive spectroscopy, with a focus on the atomic lines observed in the edge region of tokamaks. Our investigation employs a quasi‐linear model for the collective electric field generated by the plasma‐beam instability. If the beam is sufficiently energetic, the electric field can be comparable to the thermal Holtsmark microfield, and the corresponding Stark effect on atomic energy levels can be observable on spectra. We investigate this issue and perform new hydrogen line shape calculations. The applicability of the model to the diagnostics of runaway electrons is discussed.