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Communication Dans Un Congrès Année : 2016

Optimum Plasma Grid Bias for a Negative Hydrogen Ion Source Operation with Cs

M. Bacal
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M. Sasao
M. Wada
R. Mcadams
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Résumé

The functions of a biased plasma grid of a negative hydrogen (H-) ion source for both pure volume and Cs seeded operations are reexamined. Proper control of the plasma grid bias in pure volume sources yields: enhancement of the extracted negative ion current, reduction of the co-extracted electron current, flattening of the spatial distribution of plasma potential across the filter magnetic field, change in recycling from hydrogen atomic/molecular ions to atomic/ molecular neutrals and enhanced concentration of H- ions near the plasma grid. These functions are maintained in the sources seeded with Cs with additional direct emission of negative ions under positive ion and neutral hydrogen bombardment onto the plasma electrode. accepted RSI oct 2015 en attente doi
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Dates et versions

hal-02892641 , version 1 (07-07-2020)

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  • HAL Id : hal-02892641 , version 1

Citer

M. Bacal, M. Sasao, M. Wada, R. Mcadams. Optimum Plasma Grid Bias for a Negative Hydrogen Ion Source Operation with Cs. International Conference on Ion Sources, ICIS 2015, Aug 2015, New York, United States. pp.02B132. ⟨hal-02892641⟩
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