Internal Transport Barrier Formation and Pellet Injection Simulation in Helical and Tokamak Reactors

Higashiyama, You; Yamazaki, K.; García, J.; Arimoto, Hideki; Shoji, T.

doi:10.1585/pfr.3.s1048

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…ITB could be formed at V pel < 0.3 km/s (limited speed of inner-side pellet injection in ITER) at 4 mmφ and 5 mmφ pellet. As for injection frequency, 10 Hz operation for 1,000 s has already been achieved with screw extruder type pellet injector used in LHD [15]. Therefore, from these results, in TR-1 class reactor, ITB can be formed under conditions of feasible pellet velocity, size and injection frequency.…”

Section: Feasibility Of Pellet Injection Conditionmentioning

confidence: 80%

“…An effectiveness of pellet injection from high magnetic field side (HFS) as shown in Fig. 1, has already been analyzed in the tokamak reactor [15]. Since HFS injection is a method of injecting a pellet from inner wall of reactor, it requires the use of curved guide tube to route the pellets from acceleration device.…”

Section: Feasibility Of Pellet Injection Conditionmentioning

confidence: 99%

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Analyses of Core Plasma Confinement and Internal Transport Barrier Formation in Tokamak and Helical Reactors

Yamakami

Yamazaki

Arimoto

et al. 2013

Plasma and Fusion Research

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High performance operation with Internal Transport Barrier (ITB) is effective to improve the core plasma confinement in the future fusion reactor. Numerous plasma experiments with ITB were confirmed in the reversed magnetic shear. It is considered that ITB formation could be controlled by external fueling. In this study, firstly, the feasibility of pellet injection condition is simulated in tokamak reactor. Secondly, the effect of the pellet injection on the core plasma profile and ITB formation is analyzed at tokamak and helical reactors. Simulations are carried out using the toroidal transport linkage code TOTAL. In case of the operation with pellet injection from high magnetic-field side (HFS), the feasibility of pellet injection condition for ITB formation is demonstrated in the ITER-like tokamak reactor,TR-1. In both tokamak and helical reactors, it is shown that pellet injection depth is not related to the position of ITB formation, but it has significant effect to the radial profile. In helical case, wide-ranged ITB is formed when the pellet is injected centrally.

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Section: Feasibility Of Pellet Injection Conditionmentioning

confidence: 80%

Section: Feasibility Of Pellet Injection Conditionmentioning

confidence: 99%