Efficiency results from a coaxial vircator using a simple feedback technique

J. Mankowski, X. Cheng, J. Dickens, M. Kristiansen, E. Choi

Research output: Contribution to conferencePaperpeer-review

12 Scopus citations


Experimental findings on the coaxial virtual cathode oscillator (Vircator) at Texas Tech University are reported. A major modification to the system extended the pulse forming line several meters. The pulsed power system now delivers up to 750 kV and 60 kA for at least 70 nsec. Additional modifications include diagnostics to measure the diode voltage, current, and radiated field pattern of the output microwaves. In this initial phase of experiments copper reflectors were installed within the diode to provide a simple means of microwave feedback to assist in the e-beam modulation. Thus far we have observed microwave peak power output with feedback reflectors as high as 3.5 GW corresponding to an efficiency of ∼9.5%. Measured radiated field patterns show evidence of multi-mode operation.

Original languageEnglish
Number of pages4
StatePublished - 2003
Event14th IEEE International Pulsed Power Conference - Dallas, TX, United States
Duration: Jun 15 2003Jun 18 2003


Conference14th IEEE International Pulsed Power Conference
Country/TerritoryUnited States
CityDallas, TX


Dive into the research topics of 'Efficiency results from a coaxial vircator using a simple feedback technique'. Together they form a unique fingerprint.

Cite this