A hard open X-band RF accelerating structure made by two halves

TL;DR

This paper presents a novel two-halves hard-copper RF accelerating structure designed for high-gradient linear accelerators, emphasizing innovative welding techniques to enhance performance, compactness, and cost-effectiveness.

Contribution

It introduces a new geometry and welding approach for hard-copper structures, improving high-gradient performance and mode separation in RF accelerators.

Findings

Achieved high longitudinal shunt impedance

Demonstrated improved mode separation frequencies

Validated the viability of novel welding techniques

Abstract

High-gradient linacs of next generation require novel accelerating structures which are compact, robust and cost-effective. Dedicated research and development have been launched in the linear-collider community. This paper focuses on the technological developments directed to show the viability of novel welding techniques and related applications, in order to benefit from the superior high-gradient performance of accelerating structures made of hard-copper alloys. The structure geometry that we propose allows getting a high longitudinal shunt impedance of the accelerating mode and increasing the mode separation frequencies.