Design of a Pulsed Low Energy Positron System Based on Beijing Intense Slow Positron Beam |
| |
| Authors: | MA Yan-Yun PEI Shi-Lun CAO Xing-Zhong WANG Ping WEI Cun-Feng MA Chuang-Xing ZHANG Zhi-Ming WANG Shu-Hong WANG Bao-Yi WEI Long |
| |
| Affiliation: | Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, CAS, Beijing 100049, China2 Accelerator Center, Institute of High Energy Physics, CAS, Beijing 100049, China3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
| |
| Abstract: | The design of a pulsing system for an intense slow positron beam is described in this paper. Slow positron annihilation lifetime measurement is an important method to study the depth-dependent characteristics of the surface and near surface. The start signal for slow positron lifetime measurement can be obtained from the pulsing system, which consists of a reflection type chopper, a prebuncher and a buncher. On the basis of the simulation of dynamics process by Parmela, the frequency of the buncher and the positron energy have been chosen to be 150MHz and 330eV respectively. The designed time resolution of this system is about 150ps (FWHM). |
| |
| Keywords: | |
|
| 点击此处可从《中国物理C(英文版)》浏览原始摘要信息 |
|
点击此处可从《中国物理C(英文版)》下载免费的PDF全文 |
|
