A Phenomenological Probe Model of Fast Ion Measurement Using a Hybrid Directional Probe
Autor: | K. Nagaoka, M. Isobe, M. Osakabe, K. Y. Watanabe, Y. Takeiri, null CHS experimental group |
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Rok vydání: | 2008 |
Předmět: | |
Zdroj: | Contributions to Plasma Physics. 48:480-484 |
ISSN: | 1521-3986 0863-1042 |
Popis: | A phenomenological probe model was developed for quantitative fast-ion-measurement using a hybrid directional probe (HDP), which is a directional probe to measure ion current and heat flux at the same position. The secondary electrons due to fast-ion-injection onto the probe surface enhances the ion-saturation-current, thus a thermal probe method was required for quantitative measurement of fast ions. The model gives a simple expression of the secondary electron yield as a function of ion currents and heat fluxes measured by the HDP, and can determine the net fast-ion-current without the calibrations of the thermal probe method. The model was applied to the experimental results of fast-ion-measurements using a HDP in CHS, and the secondary electron yield obtained by the model agrees with the calibration results of the HDP. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
Databáze: | OpenAIRE |
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