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Performance of the Beijing pulsed variable-energy positron beam
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; Zhang, Z; Yu, RS; Wang, P
2008
发表期刊APPLIED SURFACE SCIENCE
卷号255期号:1页码:#REF!
通讯作者Wang, BY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
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.
文章类型Article; Proceedings Paper
关键词VEPLS pulsing system time resolution
学科领域Chemistry; Materials Science; Physics
DOI10.1016/j.apsusc.2008.05.183
收录类别SCI
WOS类目Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS记录号WOS:000259726900031
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226284
专题多学科研究中心
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!.
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