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Development and application of the intense slow positron beam at IHEP
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; Wang, P; Cao, XZ; Qin, XB; Zhang, Z; Yu, RS; Wei, L
Source PublicationCHINESE PHYSICS C
Corresponding AuthorWang, BY (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China.
AbstractThis paper describes the development and application of an intense slow positron beam at IHEP with regard to its two main components. The Variable-Energy Positron Lifetime Spectroscopy (VEPLS) based on the pulsing system consisting of a chopper, a prebuncher and a buncher has been constructed in order to meet the needs of materials science development. At present, the time resolution of the VEPLS can easily reach about 386 ps with a peak-to-background ratio of about 600:1. A plugged-in Na-22 positron source section for adjusting the newly built experimental station and for increasing the beam operation efficiency has been constructed. A slow positron beam with an intensity of 2.5x10(5) e(+)/s and the beam profile whose diameter is 10 mm has been obtained; the moderation efficiency of the tungsten mesh moderator reaches 5.1x10(-4) as calculated with an original positron source activity of 52 mCi.
Keywordplugged-in Na-22 positron source VEPLS time resolution
Subject AreaPhysics
Indexed BySCI ; ADS
WOS SubjectPhysics, Nuclear ; Physics, Particles & Fields
WOS IDWOS:000253607100016
ADS Bibcode2008ChPhC..32..156W
ADS URLhttps://ui.adsabs.harvard.edu/abs/2008ChPhC..32..156W
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2008ChPhC..32..156W/citations
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Cited Times:11 [ADS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Wang BY,Ma YY,Wang P,et al. Development and application of the intense slow positron beam at IHEP[J]. CHINESE PHYSICS C,2008,32(2):#REF!.
APA 王宝义.,马雁云.,王平.,曹兴忠.,秦秀波.,...&Wei, L.(2008).Development and application of the intense slow positron beam at IHEP.CHINESE PHYSICS C,32(2),#REF!.
MLA 王宝义,et al."Development and application of the intense slow positron beam at IHEP".CHINESE PHYSICS C 32.2(2008):#REF!.
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