RF modulation studies on the S band pulse compressor

TL;DR

This paper investigates RF modulation techniques on an S-band pulse compressor to enhance high-power reliability, using simulations and experiments to achieve flat-top output and address RF breakdown issues.

Contribution

It introduces RF modulation methods and a simulation approach for S-band pulse compressors, improving high-power performance and reliability.

Findings

Achieved flat-top output in low power tests.

Validated modulation theory with CST simulations.

Addressed RF breakdown challenges at 100 MW input power.

Abstract

An S band SLED-type pulse compressor has been manufactured by IHEP to challenge the 100 MW maximum input power, which means the output peak power is about 500 MW at the phase reversal time. In order to deal with the RF breakdown problem, the dual side-wall coupling irises model was used. To further improve the reliability at very high power, amplitude modulation and phase modulation with flat-top output were taken into account. The RF modulation studies on an S-band SLED are presented in this paper. Furthermore, a method is developed by using the CST Microwave Studio transient solver to simulate the time response of the pulse compressor, which can be a verification of the modulate theory. In addition, the experimental setup was constructed and the flat-top output is obtained in the low power tests.