Abstract
In support of the ICRF experiments planned on the Wendelstein 7-X (W7-X) stellarator, i.e. fast ion generation, wall conditioning, target plasma production and heating, a first experimental study on plasma production has been made in the Uragan-2M (U-2M) stellarator using W7-X-like two-strap antenna. In all the experiments, antenna monopole phasing was used. The W7-X-like antenna operation with launched radiofrequency power of ∼100 kW have been performed in helium (p = (4–14) × 10−2 Pa) with the vacuum vessel walls pre-loaded with hydrogen. Production of plasma with a density higher than 1012 cm−3 was observed near the first harmonic of the hydrogen cyclotron frequency. Operation at first hydrogen harmonic is feasible in W7-X future ICRF experiments.
| Original language | English |
|---|---|
| Article number | 905860517 |
| Journal | Journal of Plasma Physics |
| Volume | 86 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 28 Oct 2020 |
Keywords
- : fusion plasma
- plasma devices
- plasma heating