HB2025 - the 71st ICFA Advanced Beam Dynamics workshop on High-Intensity and High-Brightness Hadron Beams

Research on a Hybrid Coupled Cavity Accelerating Structure for Low-Energy High-Current Proton Beams

THPT52

Oct 23, 2025, 3:30 PM

2h

third floor (conference center)

Poster Presentation WGB:Beam Dynamics in Linacs THPT poster session

Speaker

Mingze Tuo (Tsinghua University)

Description

To enhance the accelerating efficiency of the high-current accelerator for a neutron source, a 100-mA, 162.5-MHz, CW compact hybrid accelerating cavity incorporating inductively coupled four-vane RFQ and CH DTL structures is designed. The dynamics design, the RF structure design, and water-cooling design of the hybrid cavity have been accomplished. The proton beam is accelerated from 80 keV to 0.8 MeV via the RFQ and is further accelerated to 3 MeV by the DTL. The coupling modes of the two-resonant-cavity are analyzed with the circuit model. A resonant frequency and field distribution matching scheme based on local frequency adjustments of both the RFQ and DTL sections are presented. The designed length of the hybrid accelerating cavity is 3.94 m, and its total power consumption is 101.3 kW.