Study of a MA-loaded cavity for compact synchrotron

TL;DR

This paper explores the design and testing of a magnetic alloy-loaded cavity for compact synchrotrons, demonstrating successful operation and promising electrical characteristics based on Chinese-made cores.

Contribution

It presents the first Chinese construction and testing of an MA-loaded cavity for compact synchrotrons, including design, testing, and simulation results.

Findings

Chinese MA cores show good consistency with Hitachi material.

The cavity design achieves 1 kV gap voltage with less than 1.5 kW power dissipation.

Simulation results align well with analytic calculations.

Abstract

The untuned magnetic alloy (MA) loaded cavity will be adopted in the recent proposed projects based on compact proton and heavy-ion synchrotron in China. The MA loaded cavity has been operated successfully in many accelerators, but there is no construction and operation experience in China. The small-size MA cores with outer diameter >100 mm have been supplied by Chinese firms, and the properties of cores are tested and show good consistency with Hitachi material. Based on the MA cores testing results, the schematic design of a cavity is conducted, which could obtain 1 kV gap voltage with less than 1.5 kW power dissipation in the frequency range of 0.5~7 MHz. The analytic and simulation results were compared on the resonant frequency, shunt impedance and Q value.