DEVELOPMENT OF A HIGH POWERED ELECTRON MULTIPLIER TUBE.
Abstract
The U. S. N. 8455 multiplier was tested to find its duty cycle limit of operation. Two tubes were operated at two and one half per cent duty cycle for a combined total of 260 hours. Internal part processing modifications were made to eliminate gas evolvement during operation. These changes include: 1. The addition of vacuum firing of the nickel collector and the kovar outer shell. These parts are also hydrogen fired which is a continuation of the processing used with the U.S.N. 8455. 2. The dynodes are oxidized separately before mounting the tube. One U.S.N. 8455 was processed in this way and would not operate properly at dissipations higher than two and one half per cent. Tubes were constructed with modified internal elements. Tubes with modified construction were able to operate at higher duty cycle levels. An external copper radiator with concentric ceramic ring device were designed, parts procured, and the first tube is in final stages of assembly. This construction should help to evaluate tube performance under the 10% duty cycle conditions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 15, 1965
- Accession Number
- AD0624538
Entities
People
- R. Franklin