2018
DOI: 10.1088/1361-6587/aa9a7c
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Overdense microwave plasma heating in the CNT stellarator

Abstract: Abstract. Overdense plasmas have been attained with 2.45 GHz microwave heating in the low-field, low-aspect-ratio CNT stellarator. Densities higher than four times the ordinary (O) mode cutoff density were measured with 8 kW of power injected in the O-mode and, alternatively, with 6.5 kW in the extraordinary (X) mode. The temperature profiles peak at the plasma edge. This was ascribed to collisional damping of the X-mode at the upper hybrid resonant layer. The X-mode reaches that location by tunneling, mode-co… Show more

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Cited by 8 publications
(4 citation statements)
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“…Regarding the parameter L_n, it can have much influence on the conversion of the O mode to the SX mode. The smaller L_n is, the more efficient will be the mode conversion, a dependence which should be assessed specifically [12].…”
Section: Power Transmission Windowmentioning
confidence: 99%
“…Regarding the parameter L_n, it can have much influence on the conversion of the O mode to the SX mode. The smaller L_n is, the more efficient will be the mode conversion, a dependence which should be assessed specifically [12].…”
Section: Power Transmission Windowmentioning
confidence: 99%
“…CNT was the first device to toroidally confine non-neutral plasmas [32][33][34] and plasmas with various degrees of quasi-neutrality [35]. Its focus has recently shifted to 3D diagnostic image inversion [36], error fields [37], high beta [38] and overdense microwave heating [39] in neutral stellarator plasmas.…”
Section: Tilted Interlinked Planar Coil Torsatronsmentioning
confidence: 99%
“…Microwaves are also being employed for many studies, such as the generation of plasma sources and diagnostics [5][6][7][8][9][10]. Its absorption leads to plasma heating [11], which is important in several contexts, such as tokamak [12,13], stellarator [14,15], particle * Authors to whom any correspondence should be addressed. acceleration [16,17], microwave heated chemical reactions [18] and mirror machines [19,20].…”
Section: Introductionmentioning
confidence: 99%