Abstract
Hydrogen removal experiment in HT-7 is briefly reported. The modeling effort by a Monte-Carlo transport code, DEGAS 2, was made to elucidate the energies of hydrogen neutrals in the HT-7 RF plasmas. Concentration was paid on the Balmer line emission. The modeling results reveal that the neutral hydrogen atoms in the range of 10-20 eV occupy a high fraction and they could be easily removed. This could be one of the reasons for the easy hydrogen removal via RF technique in HT-7 cleaning. The scheme with RF power at about 10 kW and the deuterium working gas at a pressure about 0.01 Pa, could be an optimized scheme for hydrogen removal.
| Original language | English |
|---|---|
| Pages (from-to) | 163-166 |
| Number of pages | 4 |
| Journal | Journal of Nuclear Materials |
| Volume | 313-316 |
| Issue number | SUPPL. |
| DOIs | |
| State | Published - Mar 2003 |
| Event | Plasma - Surface Interactions in Controlled Fusion Devices - Gifu, Japan Duration: 26 May 2002 → 31 May 2002 |
Keywords
- DEGAS 2 code
- Hydrogen removal
- Neutral energy
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