Conceptual design of an 88-MHz KBSI radio-frequency quadrupole linear accelerator

• Published in: Journal of the Korean Physical Society Vol. 63; no. 7; pp. 1311 - 1315
• Main Authors: Ok, Jung-Woo, Choi, Seyon, Yoon, Jang-Hee, Lee, Byoung-Seob, Park, Jin Yong, Won, Mi-Sook, Ahn, Jung Keun
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.10.2013; 한국물리학회
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학; Radio-frequency quadrupole (RFQ); Linear accelerator
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.63.1311

In order to accelerate ions, a radio-frequency quadrupole (RFQ) linear accelerator is being developed at the Korea Basic Science Institute (KBSI). The KBSI RFQ is designed to accelerate 1-pmA of lithium trivalent ions (A/Q = 7/3) by using a four-vane structure. We chose 88-MHz for the RF operating frequency. The energy of the beam injected into the RFQ is 12 keV/u whereas the energy of the downstream output beam is 300 keV/u. The beam dynamics inside RFQ linear accelerator was studied using the PARMTEQM code. The length of the RFQ was approximately 2 m with a transmission rate of 97.4% for lithium trivalent ions. For the structural design, a 2-dimensional geometry structure was studied using the SUPERFISH code near the resonance frequency of the quadrupole and the dipole modes. The 3-dimensional field distributions inside the RFQ cavity were investigated using CST Microwave Studio. The RFQ’s conceptual design and preliminary results for this model are reported.