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The vacuum system of the China spallation neutron source
Dong HY(董海义); Song H(宋洪); Li Q(李琦); 黄涛(东); Wang PC(王鹏程); Guan YH(关玉慧); Liu JM(刘佳明); Liu SM(刘顺明); Tan B(谭彪); Ma YS(马永胜); Sun XY(孙晓阳); Liu SH(刘盛画); Dong, HY; Song, H; Li, Q; Huang, T; Wang, PC; Guan, YH; Liu, JM; Liu, SM; Tan, B; Ma, YS; Sun, XY; Liu, SH
Source PublicationVACUUM
AbstractThe china spallation neutron source (CSNS) is designed to accelerate pulse proton beams to 1.6 GeV kinetic energy with a beam power of 100 kW at 25 Hz repetition frequency, which are used to strike a solid metal target to produce spallation neutrons. We describe the structure features, technical requirements, design scheme and experimental results of each part of the CSNS vacuum system. The alumina ceramic constructed of isostatically pressed methods is chosen as the material of the dipole and quadrupole vacuum chambers as a result of the rapid cycling magnetic field in the rapid cycling synchrotron (RCS), which were welded by glazing and metallizing, respectively. The inner surfaces of the ceramic chambers were coated with TiN using the magnetron sputtering method in order to reduce the secondary electron yield (SEY); the radio frequency (RF) shielding copper strips were covered around the outer surfaces of the ceramic chambers by a kapton film to decrease the impedance of the image current. The CSNS vacuum system has been installed and tested; an average static pressure of 1.3 x 10(-7) Pa was achieved in the RCS. The average dynamic pressure was 1.1 x 10(-6) Pa when the first beam power reached the national acceptance target of 10 kW at 25 Hz.
KeywordSpallation neutron source Vacuum system Ceramic vacuum chamber Titanium nitride (TiN) Secondary electron yield (SEY)
Indexed BySCI ; ADS ; EI
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000438000300014
EI Accession Number20182005184273
ADS Bibcode2018Vacuu.154...75D
ADS URLhttps://ui.adsabs.harvard.edu/abs/2018Vacuu.154...75D
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2018Vacuu.154...75D/citations
Citation statistics
Cited Times:2 [ADS]
Document Type期刊论文
Corresponding AuthorDong HY(董海义)
First Author AffilicationInstitute of High Energy
Corresponding Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Dong HY,Song H,Li Q,et al. The vacuum system of the China spallation neutron source[J]. VACUUM,2018,154:75-81.
APA 董海义.,宋洪.,李琦.,黄涛.,王鹏程.,...&Liu, SH.(2018).The vacuum system of the China spallation neutron source.VACUUM,154,75-81.
MLA 董海义,et al."The vacuum system of the China spallation neutron source".VACUUM 154(2018):75-81.
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