New design and preliminary tests of a novel matching section for dielectric-loaded accelerating structures

TL;DR

This paper presents a new matching section design for dielectric-loaded accelerating structures, addressing fabrication errors through improved measurement techniques, and reports preliminary cold-test results of a fabricated prototype.

Contribution

It introduces a novel matching section design and a fabrication process with enhanced measurement techniques to reduce discrepancies between simulations and measurements.

Findings

Discrepancies caused by dielectric fabrication errors can be mitigated

A new prototype dielectric tube was successfully fabricated

Preliminary cold-tests show promising results for the new design

Abstract

In our previous studies on the development of a new type of matching section for dielectric-loaded accelerating (DLA) structures, a significant discrepancy was found between measurements and simulations [Y. Wei, et al., Phys. Rev. Accel. Beams 25, 041301, 2022]. This discrepancy was caused by the fabrication errors on the dielectric dimensions. Through introducing the measurement techniques during the fabrication processing on the dielectric tube, we show that this discrepancy can be improved. A new prototype of X-band dielectric tube was then fabricated. The preliminary cold-tests are performed for this dielectric tube without coating.