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Peng, J.

Paper Title Page
TU5PFP005 Transfer Matrix Method Used in RF Tuning on DTL for CSNS 812
 
  • Z.R. Sun, S. Fu, J. Peng
    IHEP Beijing, Beijing
  
 

In the conventional 324 MHz DTL designed for China Spallation Neutron Source (CSNS) accelerating H- ion from 3MeV to 132MeV, there are 7 tanks and currently the R&D of tank-1 is under proceeding, which has 29 cells and 29 quadrupoles. In design, the Tank-1 has a tilt field distributed partially in order to obtain most effective energy gain and low Kilpatric parameter. In order to decrease the difficulty of tuning the partial tilt field distribution, a new analysis named transfer matrix method is introduced. Verifying of the calculation and simulation of the transfer matrix has been finished with MDTFISH code, picking parameters from CSNS and SNS. Checking the method on the model tank in CSNS will be operated.

  
TH5PFP024 Space-Charge Driven Emittance Coupling in CSNS Linac 3245
 
  • X. Yin
    GSI, Darmstadt
  • S. Fu, J. Peng
    IHEP Beijing, Beijing
  
 

In the conventional design of rf linacs, the space-charges are not in three-dimension thermal equilibrium. The space-charge couples the longitudinal and transverse will cause equipartitioning process which causes the emittance growth and the halo formation. In the design of the Chinese Spallation Neutron Source (CSNS) linac], three cases are investigated using the Hofmann stability charts to analysis and optimize the layout. In this paper, we present the equipartitioning beam study of the CSNS Alvarez DTL linac.

  
TH5RFP053 Design and Simulation of the Wire Scanner for Halo Formation Measurements in an Intense Beam RFQ Linac 3573
 
  • Y.F. Ruan
    Institute of High Energy Physics, CAS, Bejing
  • S. Fu, L.X. Han, J. Peng, J.L. Sun, S. Xiao, T.G. Xu, H.S. Zhang, Y.F. Zhang
    IHEP Beijing, Beijing
  
 

A high current proton RFQ accelerator has been constructed in China for the basic study of Accelerator Driven Subcritical System. A new beam line will be set up for the 3.54MeV, 50mA proton beam from the RFQ in order to study beam halo phenomenon. Therefore, 18 wire scanners consist of a thin carbon wire and two scrapers will be installed on the beam line to traverse the entire beam cross-section. So we can experimentally study the beam loss and beam halo. Some simulations results of the heat on the devices by using finite element method software–ANSYS are presented. The electronics interface will also be discussed.