CONSTRUCTION OF A HIGH-POWER RF WINDOW
The construction of a reheatable high-power ceramic window used with a traveling-wave linear accelerator between the acceleraror waveguide and the source of of power is described. This window consists of a high-purity alumina disk mounted in the common wall between two offset sections of rectangular waveguide. This location removes the ceramic disk from direct electron bombardment, in case this is a problem. O.F.H.C. copper is vacuum-cast around the edge of the disk, which is metailized with titanium hydride. A molybdenum washer is cast in the copper centered on the edge of the disk, which reduces the strain on the copper-ceramic joint during subsequent reheats by restricting the expansion of the copper. After being cast, the metalized disk is machined, then vacuum-checked heated to 500 deg in hydrogen cooled and rechecked for vacuum tighthess. If still vacuumtight, it is hydrogen-furnacebrazed with a silver- copper eutectic in o the waveguide assembly. Windows of this type typically have a voltagestanding-wave ratio (V.S.W.R.) in the range 1.01 to 1.03. One window gave a V.S.W.R. or 1.01 at 2855 megacycles with a V.S.W.R. less than 1.02 for 200 megacycles centered around 2850 megacycies. This type of window was used successfully on four linacs. (auth)
- Research Organization:
- California. Univ., Berkeley. Lawrence Radiation Lab
- DOE Contract Number:
- W-7405-ENG-48
- NSA Number:
- NSA-14-002075
- OSTI ID:
- 4210583
- Report Number(s):
- UCRL-8874
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINUM
BRAZING
CASTING
CERAMICS
CIRCUITS
CONFIGURATION
COOLING
COPPER
COPPER ALLOYS
ELECTRIC POTENTIAL
ELECTRON BEAMS
EUTECTICS
EXPANSION
FABRICATION
FREQUENCY
FURNACES
HEATING
HYDROGEN
IRRADIATION
LINEAR ACCELERATORS
MICROWAVES
MOLYBDENUM
OPERATION
PLANNING
PLATES
POWER
RADIO WAVES
SILVER ALLOYS
TESTING
TITANIUM HYDRIDES
VACUUM
WAVEGUIDES
WINDOWS