To investigate the hot electron population and the appearance of kinetic instabilities in highly charged electron cyclotron resonance ion source (ECRIS), the axially emitted bremsstrahlung spectra and microwave bursts emitted from ECRIS plasma were synchronously measured on SECRAL-II (Superconducting ECR ion source with Advanced design in Lanzhou No. II) ion source with various magnetic field configurations. The experimental results show that when the ratio of the minimum field to the resonance field (i.e. B min /B ecr ) is less than ∼0.8, the bremsstrahlung spectral temperature T s increases linearly with the B min /B ecr –ratio when the injection, extraction and radial mirror fields are kept constant. Above this threshold T s saturates and the electron cyclotron instability appears simultaneously. This study has also demonstrated that T s decreases linearly with the increa...

中文翻译：

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最小B ECR等离子体中磁性结构对热电子的影响

为了研究高电荷电子回旋共振离子源（ECRIS）中的热电子种群和动力学不稳定性的出现，在SECRAL-II（具有Advanced的超导ECR离子源）上同步测量了轴向发射的ms致辐射光谱和ECRIS等离子体发射的微波猝发磁场配置的兰州二号离子源设计）。实验结果表明，当最小场与共振场之比（即B min / B ecr）小于〜0.8时，注入时when致辐射光谱温度T s随B min / B ecr的比值线性增加。 ，提取和径向镜场保持恒定。高于该阈值，T s饱和，并且电子回旋加速器不稳定性同时出现。