ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
Electron cyclotron resonance ion sources (ECRIS) are sophisticated plasma devices, with a complex magnetic structure. The designer of an ECRIS usually solves the following problems: (i) the conception of an efficient magnetic structure; (ii) the design of an efficient extraction system. To solve the first problem numerical codes are either free or commercially available; we briefly summarize the characteristics of these codes, with particular emphasis on cryogenic devices. The second problem is much more tricky, since it is not only an electrostatic problem, as it also involves the plasma. Different codes are, however, able to treat the problem, with some assumptions concerning the plasma; these assumptions are discussed. These codes can be very useful for the new ECRIS generation, where the current densities become very high. But today there is no program available for the calculation of the charge state distribution of the ions, the magnetic structure being given; only the experience of the designer and a certain knowledge of conception rules can lead to some (rough) estimate of the future performances. We present in this paper the first version of such a code, where the input parameters of the code are the technological parameters. These inputs being given, the code solves the self-consistent problem of the plasma creation (through the resonant interaction of the electrons with the wave), the production of the ions and their transport to the extraction zone. The first results of this code are presented and discussed. This article shows that it will be soon possible to have reliable predictions of the performances of an ECRIS. © 2002 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1430272
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