Author: Sun, J.L.
Paper Title Page
TUOB01 Studies of Beam Loss Monitors at the China Spallation Neutron Source 180
 
  • T. Yang, W.L. Huang, F. Li, X.J. Nie, R.Y. Qiu, J.L. Sun, A.X. Wang, T.G. Xu, Zh.H. Xu
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • M.Y. Liu, M. Meng, J.M. Tian, L. Zeng
    IHEP, Beijing, People’s Republic of China
  
  Funding: National Natural Science Foundation of China (Grants No. 11575219, No. 11705215, and No. 11805220).
Beam loss detection is essential for the machine protection and the fine tuning of the accelerator to reduce the induced radioactivity. The beam loss monitors (BLM) at the China Spallation Neutron Source (CSNS) are mainly divided into the following types: the coaxial cylindrical ionization chamber (IC) filled with Ar/N2 gas mixture, Xe, BF3 gas, and the scintillator with photomul-tipliers, among which the Ar/N2 IC is the main type. In the low-energy section of the linac (beam energy <20 MeV), the BF3 BLMs enclosed by a high-density poly-ethylene (HDPE) moderator are utilized to detect the beam losses. The Monte Carlo program FLUKA is employed to perform the relevant simulations. This paper presents the summary of the beamloss detection for the CSNS BLM system.
Experimental studies and Monte Carlo simulations for beam loss monitors
Tao Yang, et al.
Phys. Rev. Accel. Beams 24, 032804 (2021)
 
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-TUOB01  
About • paper received ※ 03 September 2021       paper accepted ※ 27 September 2021       issue date ※ 09 October 2021  
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TUPP20
 Electromagnetic Field Simulation and Optimization for the RCS IPM in CSNS  
 
  • M.Y. Liu
    IHEP, Beijing, People’s Republic of China
  • W.L. Huang, J.L. Sun
    IHEP CSNS, Guangdong Province, People’s Republic of China
  
  Funding: Work supported by Guangdong Province Natural Science Fund (No.2021A1515010269)
Ionization profile monitors (IPMs) are widely used in high energy hadron accelerators for nondestructive beam profile measurement. The secondary particles generated by the ionization of the residual gas are collected and amplified by MCP, the output signal of which is sensitive to the influence of external disturbances dominated by the effect of space-charge. Thus the beam profile distortion should be studied primarily. Current profile correction method is mainly the commissioning of the electric field and magnetic field inside the RCS IPM to suppress the distortion. Here we verify the distortion process of the detected result through theoretical analysis and simulation, then optimize the configuration of electric field and magnetic field setting for the measurement of the CSNS-RCS IPM.
liumy@ihep.ac.cn
Corresponding author: huangwei@ihep.ac.cn 		 
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