CSNS DTL真空泄漏解决方案*

doi:10.13385/j.cnki.vacuum.2023.03.09

Abstract

Abstract: The drift tube linac(DTL) is the main part of CSNS linac, which is responsible for accelerating the negative hydrogen ion beam with a pulse current of 15mA from 3MeV to 80MeV, and then injecting it into the fast cycle synchrotron(RCS) for further acceleration. In order to avoid energy loss, ion beam acceleration must be completed in a high vacuum environment.This paper first introduces the composition of the DTL tank vacuum system, and then analyzes the current vacuum leakage, describes in detail the vacuum leakage solutions in different situations such as pickup leakage, drift tube leakage(including water leakage, air leakage, internal leakage), and reduces the leak detection area by simulation calculation by Monte Carlo method. Due to the high leakage frequency of drift tubes, this paper gives a standardized operating procedure for drift tube leakage to improve leak detection efficiency.

Key words: DTL tank vacuum system, vacuum leakage, Monte Carlo method, leak detection efficiency

CLC Number: TL53

LIU Shun-ming, WANG Peng-cheng, LIU Jia-ming, TAN Biao, SUN Xiao-yang, WANG Yi-gang, ZHU Bang-le, SONG Hong, LI Bo, WU Xiao-lei, LI A-hong. The Vacuum Leakage Solution of CSNS DTL[J].VACUUM, 2023, 60(3): 55-61.

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The Vacuum Leakage Solution of CSNS DTL

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