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Aging effect in the BESIII drift chamber
Dong MY(董明义); Xiu QL(修青磊); Wu LH(伍灵慧); Wu Z(吴智); Qin ZH(秦中华); Shen P(沈品); An FF(安芬芬); Ju XD(鞠旭东); Liu Y(刘义); Zhu K(朱凯); Ou YQ(欧阳群); Chen YB(陈元柏); Dong, MY; Xiu, QL; Wu, LH; Wu, Z; Qin, ZH; Shen, P; An, FF; Ju, XD; Liu, Y; Zhu, K; Ou-Yang, Q; Chen, YB
Source PublicationCHINESE PHYSICS C
AbstractAs the main tracking detector of BESIII, the drift chamber provides accurate measurements of the position and the momentum of the charged particles produced in e(+)e(-) collisions at BEPCII. After six years of operation, the drift chamber is suffering from aging problems due to huge beam-related background. The gains of the cells in the first ten layers show an obvious decrease, reaching a maximum decrease of about 29% for the first layer cells. Two calculation methods for the gain change (Bhabha events and accumulated charges with 0.3% aging ratio for inner chamber cells) give almost the same results. For the Malter effect encountered by the inner drift chamber in January 2012, about 0.2% water vapor was added to the MDC gas mixture to solve this cathode aging problem. These results provide an important reference for MDC operating high voltage settings and the upgrade of the inner drift chamber.
KeywordBESIII drift chamber hit rate aging accumulated charges Maher effect
Indexed BySCI ; ADS
WOS IDWOS:000368221600009
ADS Bibcode2016ChPhC..40a6001D
ADS URLhttps://ui.adsabs.harvard.edu/abs/2016ChPhC..40a6001D
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2016ChPhC..40a6001D/citations
Citation statistics
Cited Times:11 [INSPIRE]
Cited Times:9 [ADS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Dong MY,Xiu QL,Wu LH,et al. Aging effect in the BESIII drift chamber[J]. CHINESE PHYSICS C,2016,40(1):16001.
APA 董明义.,修青磊.,伍灵慧.,吴智.,秦中华.,...&Chen, YB.(2016).Aging effect in the BESIII drift chamber.CHINESE PHYSICS C,40(1),16001.
MLA 董明义,et al."Aging effect in the BESIII drift chamber".CHINESE PHYSICS C 40.1(2016):16001.
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