electron source

Describes the features of the vacuum system for BEPCⅡ linac and its main parameters, as well as the machining technique and testing method for the key devices of the linac vacuum system, such as the positron source.

介绍了直线加速器的关键设备正电子源的真空工艺。

It is one of the most important parts of the BEPCⅡ positron source and for improving the positron catching efficiency.

正电子磁通压缩装置(FluxConcentrator,简称磁号)是正电子束流横向发射度的匹配装置,对提高正电子的俘获效率起非常关键的作用,是BEPCⅡ正电子源的重要组成部分。

The positron yield is a very important parameter for positron source,and directly symbolizes the quality of an e + accelerator.

正电子产额是正电子源的一个重要物理量 ,它的高低直接关系到加速器性能的优劣 。

Source data of EDC includes paper source data and electronic source data.

采用EDC的源数据分为书面源数据和电子源数据,书面源数据的源数据核查(SDV)要求核实书面原始记录与电子病历报告形式(e-CRF),电子源数据一般认为可以免除SDV,但需要以录入时的逻辑检查与稽查轨迹查证的方式核实。