Prediction of Temperature and Stress in a Multi-stage Depressed Collector under Different Enviornmental Conditions

摘要

Increasing requirement of traveling-wave tubes (TWTs) with high efficiency, high power, high gain in addition with weight and size reductiondemand proper thermal management. Specially, collectors in TWTs have to have very good heat dissipation as spent electron beam is dumped here. In high efficiency TWTs, the maximum power of the spent electron beam is recovered by collecting the electrons at different electrode potentials and remaining unrccovercd power is waste as heat. The potentials of electrodes are essentially negative with respect to cathode, hence, coined as multi-stage depressed collector (MDC). With the increasing demand in size and weight reduction, complexity in thermal packaging enhances. This paper presents thermal and structural parameters, namely, temperature and stress distribution in different parts of a MDC using different software packages.