Saturation model for secondary electron multiplier detectors
Saturation model for secondary electron multiplier detectors
复制标题
二次电子倍增器探测器的饱和模型
DOI：
10.1016/s0168-9002(98)00893-6
复制
发表时间：
1999
影响因子：
1.4
通讯作者：
P. Shikhaliev
中科院分区：
文献类型：
--
作者：
P. Shikhaliev
建立了二次电子倍增管探测器（SEM）饱和分析模型。该模型描述了SEM检测器在高输出电流下的操作，当倍增器电极的传导电流的重要部分传递到电子雪崩电流并且倍增器电极电位被不均匀地重新分布时。预测了饱和模式下SEM探测器的主要参数：输出电流、传导电流和增益随输入电流的变化关系，电势、电场和电子雪崩电流沿着倍增电极系统的分布。提出了一种新型的具有非线性倍增极电阻的SEM（SEM-NDR），它提供了扩展的动态范围。模型预测与实验结果吻合较好。还开发和研究了SEM-NDR的样品。
An analytical saturation model for secondary electron multiplier detectors (SEM) has been developed. This model describes SEM detector operation at high output currents when the significant part of the conduction current of dynodes passes to the electron avalanche current and the dynode potential is nonuniformly redistributed. The following main parameters of the SEM detectors in the saturated mode are predicted: the output current, conduction current and gain depending on input current, the potential, electric field and electron avalanche current distribution along the dynode system. A novel type of the SEM with nonlinear dynode resistance (SEM-NDR) that provides an extended dynamic range is suggested. The model predictions are in good agreement with the experimental results. The samples of the SEM-NDR have also been developed and investigated.