HL—1装置等离子体轫致辐射径向分布的测量

采用经钨带灯标准光源标定的多道石英光纤光学系统,测量了HL-1装置等离子体可见光波段轫致辐射功率的径向分布。测得的有效离子电荷数Z_(eff)的径向分布在中心处有最大值。放电过程中电子密度的增大使Z_(eff)降低。不同放电条件下的实验结果表明,用脉冲送气提高电子密度,可使中心弦平均Z_(eff)显著降低,而等离子体电流I_p的增大使Z_(eff)上升。在若干次放电中观测到了MARFE现象。

MEASUREMENTS OF RADIAL PROFILES OF VISIBLE BREMSSTRAHLUNG RADIATION IN THE HL-1 TOKAMAK

Using a multichannel quartz optical-fiber system calibrated with a standard tungsten strip lamp,the radial profiles of the visible bremsstrahlung radiation power in the HL-1 tokamak were measured.The measured radial profiles of the effective ionic charge number Zeff are peaked at the plasma center.The results obtained show that,in a single discharge,an increase in electron density decreases Zeff significantly.In a number of discharges,by increasing the electron density with gas puffing,the central chord average Zeff can be reduced notably,while an increase in the plasma current Ip leads to an in crease in Zeff MARFE phenomena were observed in several discharges.