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 ›› 2020, Vol. 31 ›› Issue (7): 64 doi: 10.1007/s41365-020-00773-y

• ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Physical design and multi-particle simulations of a compact IH- DTL with KONUS beam dynamics for proton therapy

Jian Qiao1,2 • Xiu-Cui Xie1 • De-Ming Li1,3 • Yue-Hu Pu1,3   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2University of the Chinese Academy of Sciences, Beijing 100049, China
    3Shanghai APACTRON Particle Equipment Company Ltd., Shanghai 210800, China
  • Received:2019-12-10 Revised:2020-04-21 Accepted:2020-04-22
  • Contact: Yue-Hu Pu
  • Supported by:
    This work was supported by the Ministry of Science and Technology of the People’s Republic of China under the National Key Research and Development Program (No. 2016YFC0105408).
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Jian Qiao, Xiu-Cui Xie, De-Ming Li, Yue-Hu Pu. Physical design and multi-particle simulations of a compact IH- DTL with KONUS beam dynamics for proton therapy.Nuclear Science and Techniques, 2020, 31(7): 64     doi: 10.1007/s41365-020-00773-y

Abstract: A compact room-temperature inter-digital H-mode (IH) drift tube linac (DTL) with Kombinierte Null Grad Struktur beam dynamics is proposed in this paper. The proposed IH-DTL, which operates at 325 MHz, accelerates 18 mA proton particles from 3.0 to 7.0 MeV as part of a proton synchrotron-based therapy system. It is composed of two main sections, namely a bunching section (−30°) and accelerating section (0°). There is no transverse focusing element inside the cavity, which increases the acceleration gradient and reduces the cavity length and power consumption. In our physical designs, LORASR code is utilized for beam dynamics design and multi-particle simulations. The synchronous particle energy, injection phase, and acceleration voltage of each gap are optimized carefully to increase transmission efficiency while minimizing beam emittance growth and beam loss. The total length of the cavity is 0.82 m and the acceleration gradient reaches 4.88 MV/m, resulting in a transmission efficiency of 100% and beam emittance growth less than 10%. The details of the specific work undertaken in this study are presented in this paper.

Key words: Proton therapy, Linac injector, KONUS beam dynamics, IH-DTL