Technical design of an IH-type buncher for KoBRA at RAON

• Published in: Journal of the Korean Physical Society Vol. 83; no. 8; pp. 589 - 594
• Main Authors: Hoeltermann, H., Ratzinger, U., Schweizer, W., Strehl, D., Schwarz, M., Haehnel, H., Tshoo, K., Ham, C., Kwak, D., Shin, T. S., Yoon, D.
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Physical Society 01.10.2023; Springer Nature B.V
• Subjects: Mathematical and Computational Physics; Original Paper - Particles and Nuclei; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; Three dimensional printing; IH-type; KoBRA; Buncher
• ISSN: 0374-4884; 1976-8524
• DOI: 10.1007/s40042-023-00845-3

To satisfy the beam requirement of the KoBRA experiment (0.5 nsec in 1σ), rebunching is required in the energy range up to 15 A MeV and for particles with an A/q range from 1 to 7. In cooperation with IBS and Hanmac Corporation, BEVATECH proposed a five-gap IH-buncher cavity which has excellent bunching properties from 5 to 15 MeV/u. Main challenges in this project are the wide energy range and CW operation at RF power levels up to 20 kW. The cavity will offer an effective voltage amplitude of up to 1 MV. To provide the required cooling channels and cooling efficiency, the stems and drifttubes of this cavity will be 3D printed. This paper will discuss the technical design approach and give a status on the development of the buncher cavity.