High beta improvement and current drive in spherical tokamaks by neutral particle Injection

在球形托卡马克装置中，同轴等离子体单元的等离子体注入不可能产生大伏秒，因为它的长径比很小。目前，使用现有电源，TST-M的伏秒为25 MVS。降低击穿的伏特秒是很重要的，因为等离子体应该利用有限的伏秒被有效地加热。同轴等离子喷枪的等离子体注入已经为此进行了测试。等离子体启动时间从0.8ms缩短到0.5ms。等离子体电流从8kA增加到14kA，证明了同轴等离子体枪的等离子体注入有助于伏秒消耗。

Plasma injection by coaxial plasma gunIt is impossible to have large volt second in spherical tokamak because of low aspect ratio. Presently, volt second of TST-M is 25 mVs using the present power supply. It is important to reduce the volt second for the breakdown, because plasma should be heated efficiently using the limited volt second.Plasma injection by coaxial plasma gun has been tested for this purpose. The time for the plasma initiation is reduced from 0.8 ms to 0.5 ms. Plasma current increases from 8 kA to 14 kA.It has been proved that the plasma injection by coaxial plasma gun helps volt second consumption.