Keyword: machine-protect
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WEPAF088 Machine Protection Features of the ESS Beam Current Monitor System electronics, electron, interface, ion-source 2058
  • H. Hassanzadegan, E. Bargalló, S.G. Gabourin, T. Korhonen, S. Kövecses de Carvalho, A. Nordt, T.J. Shea
    ESS, Lund, Sweden
  • M. Mohammednezhad
    Sigma Connectivity Engineering, Lund, Sweden
  • M. Werner
    DESY, Hamburg, Germany
  The BCM system of the European Spallation Source includes several machine protection features to ensure that the actual beam parameters will be consistent with the selected beam and destination modes. Differential current measurements with several ACCT pairs are foreseen to detect beam losses particularly in the low-energy linac where Beam Loss Monitors cannot be used. The ACCTs will also be used to check that no beam will be present in the sections downstream of a temporary beam dump. These measurements will then be used to stop the beam shortly after an abnormal condition has been detected by the BCM system. This will require some customized interfaces with the Timing System and the Machine Protection System as well as an optical interface for differential current measurement over large distances. Automatic setting of the machine protection thresholds and masking/unmasking of the interlocks based on the beam and destination modes are among the technical complexities. This paper gives an overview of the design including the most recent updates and discusses in more details the machine protection features of the BCM system.  
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WEPAL006 Experimental Study of a Differential Beam Intensity Monitoring for the CIADS LINAC experiment, pick-up, linac, monitoring 2155
  • Z.P. Xie, Y.K. Ding, J. Liang
    Hohai University, Nanjing, People's Republic of China
  • Y. He, Z.J. Wang, J.X. Wu, Y. Zhang
    IMP/CAS, Lanzhou, People's Republic of China
  Funding: Work supported by the National Natural Science Foundation of China (Grant No. 91026001) and the Fundamental Research Funds for the Chinese Central Universities
A BPM based beam loss monitoring scheme for the China initiative accelerator driven subcritical (CIADS) facility has been proposed for the MEBT section of its high power Linac. In this scheme, a differential beam monitoring algorithm is utilized that relies on beam intensity measurements using BPM electrodes. Discussions of the experimental results for the scheme are presented. Further experiments have been performed with some promising results. This paper describes the experimental results with some analyses on measurement errors of the system. The proposed physical design of this system is described and further development is presented.
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