ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We have developed a semiempirical simulation of the ionic currents extracted from an ECRIS (electron cyclotron resonance ion source). Our main contribution was to find an empirical dependence of the negative potential dip ΔΦ created by the hot electrons on the temperature parameter T⊥ which characterizes the non-Maxwellian electrons. Our model satisfactorily reproduces the extracted ionic currents, both for weekly and highly charged ions, and for both the stable and the periodic regimes. In the latter case, the currents undergo strong fluctuations. The highly charged ion currents exhibit an elaborate time evolution reflecting the competition between their production and their extraction which are, respectively, favored and inhibited by an increase in T⊥. These results confirm that the ions are electrostatically confined in the plasma and clearly show that T⊥ is a key parameter of the ECRIS plasmas. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1148556
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