RF conditioning for the improvement of lower hybrid fast wave comb-line antenna performance on VEST

Jo, JongGab; Wang, J.; Kim, S.H.; Hwang, Y.S.

doi:10.1016/j.fusengdes.2019.01.004

Cited by 2 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the initial phase, the out-gassing was severe and the amount was random at the same dissipation power. It, however, gradually decreased with the conditioning progress and showed a regular pattern decreasing rapidly shot by shot [43]. The transmitted RF power to dummy load was achieved up to 10 kW after the successful vacuum conditioning as shown in figure 10.…”

Section: Vacuum Conditioningmentioning

confidence: 95%

Current drive by using lower hybrid fast wave in VEST

Kim,

Jo,

Wang

et al. 2024

Nucl. Fusion

Self Cite

View full text Add to dashboard Cite

An efficient central or off-axis current drive is necessary for the steady-state operation of tokamak fusion reactors. The fast wave branch in the frequency range above two times the lower hybrid resonance frequency at high density, the so-called LHFW, could be such an efficient current drive scheme in high density and high temperature of reactor-grade tokamak plasmas. This is because it has a higher parallel wave electric field for efficient Landau damping, compared to the fast wave branches in other frequency ranges, and it can more deeply penetrate high density plasmas than the slow wave in the same frequency range. An experimental study has been carried out to confirm the feasibility, in collaboration with KAERI, SNU, KWU, and KAPRA, in VEST. The results show that plasma current can be driven by the fast electrons generated by the LHFW. The details are reported including the theoretical background and RF system as well as the experiment results.

show abstract

Section: Vacuum Conditioningmentioning

confidence: 95%