A description of an edge-biasing experiment conducted on the spherical compact toroid plasma injector is presented with results. The insertion of a disk-shaped molybdenum electrode (probe), biased at up to +100 V, into the edge of the Compact Torus (CT), resulted in up to 1.2 kA radial current being drawn from the probe to the wall. Core electron temperature, as measured with a Thomson-scattering diagnostic, and CT lifetime, more than doubled in the optimal configuration tested. Temperature and density profiles become more centrally peaked with biasing. In contrast to previous biasing experiments, a significant reduction in electron density was observed; this may be due to the effect of a transport barrier impeding CT fueling and associated cooling, where, as verified by MHD simulation, a principal fueling source is neutral gas that remains concentrated around the gas valves after CT formation.

中文翻译：

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通过在SPECTOR上施加等离子边缘偏置来提高性能

结果描述了在球形紧凑环形等离子体喷射器上进行的边缘偏斜实验。将偏置电压为+100 V的圆盘形钼电极（探针）插入紧凑型圆环（CT）的边缘，导致从探针到壁上吸收的径向电流高达1.2 kA。用汤姆森散射诊断仪测量的核心电子温度和CT寿命在测试的最佳配置下增加了一倍以上。温度和密度分布在偏见的作用下变得更加集中。与以前的偏压实验相反，观察到电子密度显着降低；这可能是由于运输障碍的影响，阻碍了CT加油和相关的冷却，如MHD仿真所证实的那样，