RESEARCH AND DEVELOPMENT PROGRAM FOR X-BAND CROSSED-FIELD AMPLIFIER.
Abstract
The problem of bending of the delay line substrate under the combined forces of the coolant and vacuum was greatly alleviated and perhaps solved by narrowing it 25%. The alternate solution tried, a supporting member behind it, was less satisfactory. The input and output coupling was studied with the thought of suppressing the fast TEM wave between sole and line. Quarter-wave chokes are being investigated. Output and input matching need further improvement. Window design appears satisfactory. Preliminary studies of the beryllia ceramic substrate appear encouraging, but further improvement of the surface is required. The gun was shielded further because of its sensitivity to RF energy. Tests of guns alone indicate that for good enough transmission, the magnetic field must be increased, leading to too low a value of beam velocity. The brazing of the substrate to the water jacket has shown improvement, and several sub-assemblies were brazed successfully, both sapphire and beryllia. An amplifier tube is in the final stages of construction. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 12, 1965
- Accession Number
- AD0615554