The softening of current quenches in JT-60U
作者： R Yoshino , Y Neyatani , N Hosogane , S.W Wolfe , M Matsukawa
DOI: 10.1088/0029-5515/33/11/I02
关键词:
摘要: Current quenches caused by density limit disruptions have been investigated in JT-60U divertor plasmas order to develop general methods of reducing the current decay rate and suppressing generation runaway electrons. The reduction impurity influxes at an energy quench direct neutral beam (NB) heating plasma core during a were beneficial for speed quench. low stored just before high safety factor edge had advantage decreasing detached state was useful degrading confinement both joule NB heated within short time period. Runaway electrons not generated densities more than 5*1019 m-3 measured Fast controlled shutdown with but without demonstrated successfully from 2 MA zero, value dIp/dt -6 MA/s. This obtained lowering period 20 ms, actively using produced intense helium gas puffing
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