CERENKOV MICROWAVE GENERATOR.
Abstract
Measurements were made of the CW Cerenkov radiation generated by the interaction of a modulated ribbon electron beam with a dielectric reflection coupler. The coupler consists of two identical 1.27-cm wide slab sectors having an interaction length of 10cm. The dielectric coefficient of the coupler material is 15 at the beam modulation frequency of 6.33 Gc. Typical experimental parameters are: dc beam current, 0.30 ma; gun voltage plus potential well voltage, 70 kv; bunch rf power, 1.0 watt; and beam-to-dielectric separation, 0.16 cm. Separating the contribution of leakage radiation and resonance radiation from the detected power level gives 4.6 microwatts as the detected Cerenkov power for a typical experimental determination. The generatedto-detected power ratio is determined to be between 165 to 75. Using the calculated value of the beam current amplitude at 6.33 Gc yields 1,250 to 560 ohms/cm for the interaction resistance per unit length. The value of 1,250 ohms/cm is in good agreement with the interaction resistance predicted by the theory developed in previous work. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1964
- Accession Number
- AD0608218
Entities
People
- A. Boornard
- J. J. Stekert
- J. M. Brumbaugh
- L. W. Zelby
Organizations
- RTX