Electron cyclotron resonance ion source ionic currents (both in the stable and periodic regimes) modeled in relation with the hot electron temperature via the potential dip

R. Pras; M. Lamoureux; A. Girard

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Electron cyclotron resonance ion source ionic currents (both in the stable and periodic regimes) modeled in relation with the hot electron temperature via the potential dip

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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 △ф 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. S0034-6748(98)53902-0

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《Review of Scientific Instruments》 |1998年第2期|700-702|共3页
作者
R. Pras; M. Lamoureux; A. Girard;
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Laboratoire de Dynamique des Ions,/ Atomes et Molécules, case 75, Université Pierre et Marie Curie, 4 place Jussieu, 75252 Paris Cedex 05, France;

Département de Recherche Fondamentale sur la Matière Condensée,/ Si2A, CEA-Grenoble,1 7 rue des Martyrs, 38054 Grenoble, Cedex 9, France;

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Electron cyclotron resonance ion source ionic currents (both in the stable and periodic regimes) modeled in relation with the hot electron temperature via the potential dip

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