高精度材料二次电子产额测试装置的设计与研究
高精度材料二次电子产额测试装置的设计与研究
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DOI:
10.13385/j.cnki.vacuum.2016.02.16
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
张宇心
中科院分区:
文献类型:
--
作者:
徐延辉;王洁;王勇;张波;范乐;裴香涛;洪远志;尉伟;张宇心
: In particle accelerators, the secondary electrons resulting from interaction between particles and vacuum chamber have a great impact on the beam uality. Especially for positron and proton accelerators, massive electrons will lead to the electron cloud, which adversely affect the stability, energy, emittance and beam life. We studied the secondary electron emission(SEE)of metal used for accelerators. A SEE measurement system with 50 ~5000eV low energy electron gun was designed. Using the secondary electron emission yield (SEY)test setup, we obtained the SEY of stainless steel and oxygen free copper. The maximum SEY of stainless steel and oxygen free copper are 2.5 and 1.82, respectively. Compared with the results reported by other research nstitutions, it’s indicated that our SEY test setup is reliable.