Performance of the Beijing pulsed variable-energy positron beam
文献类型：期刊论文
| 作者 | Wang BY(王宝义) ; Ma YY(马雁云); Wang P(王平); Cao XZ(曹兴忠); Qin XB(秦秀波); Zhang Z(张哲); Yu RS(于润升); Wei L(魏龙); Wang, BY; Ma, YY
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| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2008 |
| 卷号 | 255期号:1页码:#REF! |
| 关键词 | VEPLS pulsing system time resolution |
| 通讯作者 | Wang, BY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China. |
| 英文摘要 | In order to study the depth-dependent characteristics of open-volume defects in thin surface layers, the variable-energy positron lifetime spectroscopy (VEPLS) has been enabled by pulsing a continuous positron beam. The buncher is a quarter-wave coaxial resonator and the RF-signal is fed in by a coupling loop with a frequency of 149.89 MHz and the reflection factor of 0.05 measured by a Network Analyzer. Three synchronic signals with their phases and amplitudes adjusted independently are supplied for start signal of the positron lifetime measurement and the power signal by an electronic system. The stop signal is derived from a detector, a BaF(2) scintillator coupled to a photomultiplier-tube (Hamamatsu). The time resolution of 295 ps (FWHM) was achieved for a Kapton film and a Ti sample at positron energies in the range between 1 keV and 30 keV. (C) 2008 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry; Materials Science; Physics |
| 类目[WOS] | Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter |
| 收录类别 | SCI |
| WOS记录号 | WOS:000259726900031 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/226284]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_理论物理室 |
| 推荐引用方式 GB/T 7714 | Wang BY,Ma YY,Wang P,et al. Performance of the Beijing pulsed variable-energy positron beam[J]. APPLIED SURFACE SCIENCE,2008,255(1):#REF!. |
| APA | 王宝义.,马雁云.,王平.,曹兴忠.,秦秀波.,...&Wang, P.(2008).Performance of the Beijing pulsed variable-energy positron beam.APPLIED SURFACE SCIENCE,255(1),#REF!. |
| MLA | 王宝义,et al."Performance of the Beijing pulsed variable-energy positron beam".APPLIED SURFACE SCIENCE 255.1(2008):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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