国内外加速器极高真空技术进展

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Chinese Physics C(HEP&NP)Vol.32, ,Mar.,2008

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2.1LHC

, , (CERN) (LHC) .LHC 7TeV , 26.7km, 75%, , .LHC [1] : ; . 10−4Pa , 100h , . , 1.9K , , , ( H2 , 100h H2 1013∼15H2m−3)[1].

( 1000 [2]). , . , LHe , 5—20K. , 4%.

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(GSI) (FAIR) 2 ,4 [3]. SIS100 SIS300 1084m, , 5×10−10Pa. LHC ,SIS100 SIS300 80% , LHe (4—15K) .20% 300℃ ;4 (CR,211m) (RESR,245m) (NESR,222m) (HESR,574m). , , + , P 5×10−10Pa; 2.5km, P=1×10−7Pa, P 5×10−10Pa.

47

48Chinese Physics C(HEP&NP)Vol.32

(References)

1LHC Design Report,CERN,Geneva,2003

2CAS,CERN,Geneva,1999

3Kramer A.GSI Vacuum Group,Darmstadt,Germany 4Kurisu H.IVC-17,VST09-IS1,2007,Stockholm,Sweden 5Chiggiato P,Pinto P C.CERN-TS-2006-001

6Baglin V.Vacuum,2007,81:803—807

7LI De-Tian,LI Zhen-Hai,GUO Mei-Ru et al.Vacuum Sci-ence&Technology,2007,26(2):92—96

Progress of XHV Technology at Particle Accelerators

YANG Xiao-Tian1)

(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou730000,China)

Abstract Recent vacuum system development with an XHV condition for the particle accelerators is briefly described. The progress of selecting and treatment of the materials used in XHV systems is introduced,and the choice of the main pump for an XHV system and some new pumping method are presented.Some leak detection experiences both for the superconducting and warm vacuum systems are recommended and the status of XHV measurement and the gauge calibration are introduced.

Key words particle accelerator,extreme high vacuum(XHV),gasload

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