Author: Chen, J.E.
Paper Title Page
TUYB01 Proton Beam Acceleration with Circular Polarized Laser Pulses 1045
  • X.Q. Yan, J.E. Chen, C. Lin, Y.R. Lu, H. Wang
    PKU/IHIP, Beijing, People's Republic of China
  • Z.Y. Guo
    IHEP, Beijing, People's Republic of China
  This presentation should describe the use of circular polarized laser pulses for phase-stable acceleration of proton beams. The principles of the technique should be explained, with comparisons and contrasts made with similar techniques. The potential for production of high-intensity, mono-energetic proton beams should be discussed, and the results of analytical, simulation, and experimental studies presented.  
slides icon Slides TUYB01 [7.922 MB]  
THPPC013 Progress on Coupled RFQ-SFRFQ Accelerator for Materials Irradiation Research 3302
  • Z. Wang, J.E. Chen, S.L. Gao, Z.Y. Guo, Y.R. Lu, S.X. Peng, W.L. Xia, X.Q. Yan, J. Zhao, K. Zhu
    PKU/IHIP, Beijing, People's Republic of China
  Funding: Project supported by the National Natural Science Foundation of China (Grant No.10905003) and China Postdoctoral Science Foundation.
There is always high interest to study material irradiation damage effects based on accelerators. The bombardment of solids with high energy particles causes some changes in many important engineering properties. By implanting helium ions, it may be possible to simulate the damage process occurs in vessels and unravel the complexμstructural andμchemical evolutions that are expected in advanced nuclear energy systems. A materials irradiation facility based on coupled RFQ-SFRFQ accelerator will be built in Peking University, attribute to the commissioning of prototype SFRFQ accelerator, we have coupled the SFRFQ electrodes and the traditional RFQ electrodes in one cavity to form a more compact accelerator which can provide helium beam with energy of 0.8MeV for materials irradiation research.
THPPP041 A CW High Charge State Heavy Ion RFQ Accelerator for SSC-LINAC Injector 3826
  • G. Liu, J.E. Chen, S.L. Gao, Y.R. Lu, Z. Wang, X.Q. Yan, Q.F. Zhou, K. Zhu
    PKU/IHIP, Beijing, People's Republic of China
  • Y. He, C. Xiao, Y.Q. Yang, Y.J. Yuan, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
  Funding: Supported by NSFC(11079001).
The cooler storage ring synchrotron CSR of HIRFL started running in 2008. The SFC (Sector Focusing Cyclotron) and SSC (Separator Sector Cyclotron) form an injector for the CSR. To improve beam intensity and/or injection efficiency, a new linear injector, the SSC-LINAC, for the SSC has been proposed to replace the existing SFC. The SSC-LINAC consists of an ECR ion source, LEBT, a RFQ, MEBT, and four IH-DTLs. This paper only represents the design research of the RFQ accelerator, which has a frequency of 53.667MHz. The ions up to uranium with ratio of mass-to-charge up to 7 are accelerated and injected into the CSR by the SSC-LINAC. The SSC-LINAC works on CW mode. The RFQ beam dynamic design study is based on 238U34+ beams with intensity of 0.5mA. The inter-vane voltage is 70kV with a maximum modulation factor of 1.93. It uses a 2.5m-long 4-rod structure to accelerate uranium ions from 3.728keV/u to 143keV/u with transmission efficiency of 94%. The RFQDYN code checks the transmission of different kinds of ions in the RFQ. The specific shunt impedance of RFQ is optimized to 438kΩ.m. The design of cavity tuning and the water cooling system are also included in this paper.
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