Moving Divertor Plates in a Tokamak

Abstract

Moving divertor plates could help solve some of the problems of the tokamak divertor through mechanical ingenuity rather than plasma physics. These plates would be passively heated on each pass through the tokamak and cooled and reprocessed outside the tokamak. There are many design options using varying plate shapes, orientations, motions, coatings, and compositions.

Local scrape-off layer control using biased electrodes in NSTX

“…For the OH and RF cases electrodes E1 and E4 were grounded, while for the NBI cases electrode E1 was grounded and E4 was biased the same as E2. For the NBI plasmas the L-mode and H-mode behavior was similar, as described previously [26]. For all cases I=600-800 MA and B=4.5-5.5 kG.…”

“…Preliminary reports on these NSTX electrode biasing experiments described the diagnostics and electrode design [25], and the results from an initial set of experiments [26]. The present paper contains additional experimental results and more detailed analysis.…”

“…Further information concerning the electrodes and probe hardware for this experiment are described elsewhere [25]. A preliminary report on the NSTX biasing experiments can be found in [26], and information on the GPI diagnostic on NSTX can be found in [27].…”