Towards explanation of the two-frequency heating effect in electron cyclotron ion sources
A. G. Shalashov, E. D. Gospodchikov, I. V. Izotov, V. A. Skalyga, (Institute of Applied Physics of Russian Academy of Sciences, Russia)
TL;DR
This paper investigates how bichromatic wave heating in electron cyclotron resonance (ECR) sources can stabilize instabilities and improve ion source performance, supported by a quasilinear model predicting electron distribution broadening.
Contribution
It introduces a theoretical explanation for the two-frequency heating effect in ECR ion sources using a quasilinear model.
Findings
Bichromatic wave broadens electron distribution function.
Stabilizes kinetic instabilities in ECR ion sources.
Improves ion source performance as observed experimentally.
Abstract
The quasilinear model of electron cyclotron resonance (ECR) heating in a mirror magnetic field predicts essential broadening of the electron distribution function in case of bichromatic wave. This may stabilize kinetic instabilities in the electron-cyclotron frequency range resulting in improved performance of ECR ion sources, the effect which is observed in many independent experiments.
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Taxonomy
TopicsParticle accelerators and beam dynamics · Plasma Diagnostics and Applications · Electrostatic Discharge in Electronics