Research on Vacuum Test of Sealed TWT

摘要

Vacuum is an important parameter which is related to TWTs’ long term operation and reliability. Vacuum deteriorate rate in tuning, vibration, thermal and vacuum thermal tests can be used to evaluate a TWT’s functional quality in a short-term way. By using TWT electrodes and cathode, an ion current test system is applied to scale vacuum status. After calibration, ion current and vacuum are matched in pairs. We tested a TWT’s vacuum over a long term of tuning and environmental tests.