Research on the secondary electron yield of TiZrV-Pd thin film coatings
Research on the secondary electron yield of TiZrV-Pd thin film coatings
复制标题
TiZrV-Pd薄膜涂层二次电子产额研究
DOI：
10.1016/j.vacuum.2016.05.001
复制
发表时间：
2016
期刊：
影响因子：
4
通讯作者：
Wei Wei
中科院分区：
文献类型：
--
作者：
Wang Jie;Wang Yong;Xu Yanhui;Zhang Bo;Wei Wei
在粒子加速器中，电子云的积聚对束流质量有重要影响。特别是对于正电子和质子加速器，大量电子会形成电子云，这对稳定性、能量、发射度和束流寿命产生不利影响。设计并使用了一个二次电子发射（SEE）测量系统，用于研究能量在50电子伏特到5千电子伏特之间可独立调节的钯（Pd）、TiZrV以及TiZrV - Pd的二次电子发射情况。在此，我们获得了超高真空（UHV）条件下不同厚度的Pd、TiZrV和TiZrV - Pd薄膜涂层的二次电子发射特性。此外，在不同的一次电子剂量下，Pd、TiZrV和TiZrV - Pd薄膜涂层的最小最大二次电子产额（SEY），即δmax，分别为1.38、1.51和1.52。最后，将讨论Pd、TiZrV和TiZrV - Pd薄膜涂层的二次电子产额随入射电子能量的变化情况。
In particle accelerators, the build-up of electron cloud has an important influence on beam quality. Especially for the positron and proton accelerators, massive electrons lead to electron cloud, which affects the stability, energy, emittance and beam life adversely. A secondary electron emission (SEE).measurement system has been designed and used to study the SEE of palladium (Pd), TiZrV and TiZrV-Pd with an independently adjustable energy from 50 eV to 5 keV. Here, we obtained the characteristics of the SEE from Pd, TiZrV and TiZrV-Pd film coatings with different thickness under ultrahigh-vacuum.(UHV) conditions. Moreover, the minimum maximum secondary electron yield (SEY), d max , of the Pd, TiZrV and TiZrV-Pd film coatings under different primary electron doses were 1.38, 1.51, and 1.52, respectively. Finally, the variation of the secondary electron yield with the incident electron energy will.be discussed for Pd, TiZrV and TiZrV-Pd thin film coatings.