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介于已有的喷气(Gas puffing)和弹丸注入(Ice pellet injection)之间,提出了一种新的托卡马克加料手段—脉冲超声分子束注入。在较高的粒子注入通量5×10~(19)脉冲~(-1)时,氢分子的速度仍可达到500m/s。一系列氦分子束脉冲注入初始密度为(?)=0.4×10~(19)m~(-3)HL-1M真空室氢等离子体,经过160ms,密度上升至(?)=5.4×10~(19)m~(-3)。根据脉冲分子束注入初期氦光谱(HeⅠ587.6nm)强度的径向分布,1/3峰高位于r=12cm附近。注入后粒子约束时间增加5倍。由于气体粒子注入深化,电子密度峰化因子Q_n=n_e(0)/
Between existing gas puffing and ice pellet injection, a new tokamak charging method, pulsed ultrasonic molecular beam injection, is proposed. At higher particle injection fluxes of 5 × 10 ~ (19) pulses ~ (-1), hydrogen molecules can still reach a velocity of 500 m / s. A series of helium molecular beam implants with an initial density of (?) = 0.4 × 10 ~ (19) m ~ (-3) HL-1M vacuum chamber hydrogen plasma, after 160ms, the density increased to (?) = 5.4 × 10 ~ (19) m ~ (-3). According to the radial distribution of the intensity of helium spectrum (HeⅠ587.6nm) in the initial stage of pulsed molecular beam injection, the peak height of 1/3 is around r = 12cm. Particle confinement time increased by 5 times after injection. Due to the deepening of gas particle injection, the electron density peaking factor Q_n = n_e (0) /