Collector structure for a travelling-wave tube having oxide film

Details Collector structure for a travelling-wave tube having oxide film Collector structure for a travelling-wave tube having oxide film

1997-03-31

1999-07-27

Lee, Benny T.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

313 45, 313 46, H01J 23033

Patent

active

059295660

ABSTRACT:
A collector for a travelling-wave tube includes a collector core and a fin structure surrounding the core and having a plurality of fins for heat radiation. An oxide film having a thickness of greater than 50 .mu.m inclusive is formed on the outer periphery of the fin structure by anodization and has the maximum surface roughness of 12 .mu.m inclusive. When the 50 .mu.m or thicker oxide film is sealed or when a 45 .mu.m or thicker oxide film is formed and sealed, the oxide film is provided with the maximum surface roughness of greater than 12 .mu.m inclusive. The collector with any one of such structures achieves an emissivity of 0.90 or above and can efficiently radiate heat generated by the tube in the space.

REFERENCES:
patent: 3666980 (1972-05-01), Jackson
patent: 4054811 (1977-10-01), Huber et al.
Patent Abstracts of Japan; vol. 008, No. 216 (M-329), Oct. 3, 1984 & JP 59 100348 (Sharp KK), Jun. 9, 1984.
M. F. Rose et al.: "Novel Techniques for the Thermal Management of Space-based, High-Power Microwave Tubes" IEEE Transactions on Electron Devices, vol. 38, No. 10, Oct. 1, 1991, pp. 2252-2263.
Database WPI Week 8815 1988; Derwent Publications Ltd. London, GB; AN 88-100635 XP002036863 & JP 63 045 895 A (Showa Aluminum Co. Ltd), Feb. 26, 1988.

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