Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2017, Vol. 28 ›› Issue (9): 120 doi: 10.1007/s41365-017-0273-0


Simulation study of slow extraction for the Shanghai Advanced Proton Therapy facility

Yu-Hui Yang 1,2  Man-Zhou Zhang 1  De-Ming Li 1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Contact: Man-Zhou Zhang
  • Supported by:

    This work was supported by the Youth Innovation Promotion Association of Chinese Academy of Sciences (No. 20150210).

Yu-Hui Yang, Man-Zhou Zhang, De-Ming Li. Simulation study of slow extraction for the Shanghai Advanced Proton Therapy facility.Nuclear Science and Techniques, 2017, 28(9): 120     doi: 10.1007/s41365-017-0273-0


The Shanghai Advanced Proton Therapy facility employs third-integer slow extraction. In order to achieve accurate treatment, high-quality spill is needed. Therefore, parameters that may affect slow extraction should be investigated by simulation. A computer model of the synchrotron operation slow extraction was constructed with MATLAB®. By simulating the motion of the circulating protons, we could quantify the influence of machine and initial beam parameters on properties of the extracted beam, such as ripple, uniformity, stability, on- and off-time of the spill and spill width in the synchrotron. Suitable design parameters including the horizontal tunes, power supply ripple, longitudinal RF cavity voltage, RF-KO and the chromaticities were determined.

Key words: Slow extraction, Accelerator model, Spill ripple, Particle beam therapy, Synchrotron