Zhenzhe HAN, Pingwei ZHENG. Numerical investigation of Tokamak runaway current suppression by using massive deuterium-argon/neon gas mixture injection[J]. NUCLEAR TECHNIQUES, 2024, 47(8): 080601
- NUCLEAR TECHNIQUES
- Vol. 47, Issue 8, 080601 (2024)
Fig. 1. Initial radial distribution of electron temperature (a) and density (b)
Fig. 2. Evolution of plasma and a runaway current over time without gas mixture injection
Fig. 3. Results of injecting a deuterium-argon gas mixture (nD=9.2×1020 m-3, nAr=1.1×1019 m-3) (a) Evolution of plasma current (solid lines), ohmic current (dotted lines), and runaway current (dashed lines) over time, (b) Evolution of the ohmic electric field over time for different normalized radial radii
Fig. 4. Results of the variations in the platform runaway current with the injected deuterium-argon content (a) nD=9.2×1020 m-3 is kept constant whilst the argon content is gradually increased, (b) nAr=4×1018 m-3 is kept constant whilst the deuterium content is gradually increased
Fig. 5. Results of the variations in the platform runaway current with the injected deuterium-neon content (a) nD=9.2×1020 m-3 is kept constant whilst the amount of neon is gradually increased, (b) nNe=4.5×1018 m-3 is kept constant whilst the deuterium content is gradually increased
Fig. 6. Collisional dissipation effects on the runaway current at high density (ne=1022 m-3)
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Table 1. Results at different Ip and Te0 values without gas mixture injection
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Table 2. Results of injecting the optimal content of deuterium-argon gas mixture
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Table 3. Results of injecting the optimal content of deuterium-neon gas mixture
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