LINAC2026 - 33rd Linear Accelerator Conference

Beam dynamics and RF design of a split-coaxial radio frequency quadrupole for axial injection

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC3.A05: RFQs Poster Session

Speaker

Junzhao You (Peking University)

Description

A 36.526 MHz coaxial-split RFQ(Radio Frequency Quadrupole) accelerator has been developed for cyclotron injection. The main advantage of this cavity is that it can overcome the problem of an excessively large transverse size of conventional RFQs at low frequency, which is beneficial for the axial injection of the cyclotron and reduces the influence on the cyclotron yoke magnet. This coaxial-split RFQ is designed to accelerate a 3.5 mA H₂⁺ beam from 20 keV to 70 keV in continuous wave operation. Electromagnetic simulations have shown that the average power loss of this 1.618 m long RF accelerator is about 12 kW in CW mode. Due to the special structure of the coaxial-split RFQ, the dynamics and RF structural design of the cavity are mainly presented in this paper.