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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
Corresponding AuthorWang, BY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
SubtypeArticle; Proceedings Paper
AbstractIn 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.
KeywordVEPLS pulsing system time resolution
Subject AreaChemistry; Materials Science; Physics
Indexed BySCI ; ADS
WOS SubjectChemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000259726900031
ADS Bibcode2008ApSS..255..119W
ADS URLhttps://ui.adsabs.harvard.edu/abs/2008ApSS..255..119W
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2008ApSS..255..119W/citations
Citation statistics
Cited Times:7 [ADS]
Document Type期刊论文
Recommended Citation
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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