Speaker
Description
China Institute of Atomic Energy is upgrading the injection line of the 100MeV high current compact H- cyclotron (CYCIAE-100) with the aim of extracting mA level beam from the cyclotron to meet growing scientific research and commercial application demands, ultimately aiming to establish the world's highest beam power cyclotron facility. The buncher upgrade represents a critical component of this project. The buncher can effectively enhance the beam current within the acceptance phase of the cyclotron and optimize beam performance parameters. The newly developed buncher system employs a bunching voltage synthesized from the fundamental and third harmonics, for which a compact cavity matching circuit supporting both harmonics was specifically designed. The cavity adopts a λ/4 coaxial transmission line structure, was modeled and optimized for key parameters such as frequency and Q-factor using CST software, and the cavity was folded to accommodate the compact layout of the injection line. The cavity matching circuit and buncher have now completed cold testing and highpower testing, have been successfully installed in the injection line, and have undergone online testing under low-beam-current conditions. The results demonstrate a bunching gain of 2.2 achieved at an ion source extraction current of 1.4 mA, providing preliminary verification of the buncher's proper operation.
Footnotes
*: Corresponding Author, Dr. Zhiguo Yin, Email:zhiguoyin@ciae.ac.cn
