Open AccessCutoff limitation of left-hand polarization wave and candidates for further enhanced producing multicharged ions on ECRIS
Author(s) -
Yushi Kato,
Wataru Kubo,
Shuhei Harisaki,
M Anan,
Kazuki Tsuda,
Koichi Sato,
Issei Owada,
T Maenaka
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2244/1/012001
Subject(s) - electron cyclotron resonance , cutoff , cutoff frequency , resonance (particle physics) , ion , plasma , cyclotron resonance , physics , atomic physics , ion cyclotron resonance , cyclotron , polarization (electrochemistry) , lower hybrid oscillation , magnetic field , computational physics , chemistry , optics , nuclear physics , quantum mechanics
Based on experimentally obtained plasma parameters in an electron cyclotron resonance (ECR) ion source (ECRIS) and theoretical considerations, it is turned out the essential factor that is currently presumed to define the increase in multicharged ion current in ECRIS is not simply the density limit of ordinary wave and right-hand cutoffs, but is also higher density one of left-hand cutoff. There are two response guidelines that can be considered to make it possible to overcome limitations, except for the conventional simply increasing the frequency and the magnetic field strength. One is advanced high-frequency resonance, i.e. , upper-hybrid resonance (UHR), which is conversion from electromagnetic to electrostatic wave essentially without cutoff. The others are due to the introduction of lower frequency waves than ECR’s one, which has no density limit in a more essential sense. The latter is the introduction of lower-hybrid resonance (LHR) or ion cyclotron resonance (ICR). We will describe experimentally obtained plasma parameters, and will discuss these candidate applications.