Environmental influences contributing to window failure of the SLAC 50 MW klystron

Technical Report · Thu Mar 01 00:00:00 EST 1984

DOI:https://doi.org/10.2172/5033188· OSTI ID:5033188

Krienen, F

The additional heating of the klystron window is due to the intense x-ray level, produced inside the klystron, illuminating the entrance of the output wave guide. Photo-electric effect, although of low efficiency, produces enough electrons at the right location and right phase to start multipactor, which progresses with increasing intensity towards the window. The intercepted charge and the concomitant x-radiation heat the window, but the heating is not the cause of the breakdown per se. The accumulated charge on the window creates electric stress, which comes in addition to the RF stress. It could therefore be a major cause of electrical breakdown. The coating, which is intended to carry this charge off, should have a relaxation time constant small compared to the pulse duration. Unfortunately the coating can not be made conducting enough because it conflicts with the Joule heating in the RF field.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 5033188
• Report Number(s): SLAC/AP-19; ON: DE84008972
• Resource Relation: Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
KLYSTRONS
PERFORMANCE
PHYSICAL RADIATION EFFECTS
EXPERIMENTAL DATA
FAILURES
RADIATION DOSES
WINDOWS
X RADIATION
DATA
DOSES
ELECTROMAGNETIC RADIATION
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
INFORMATION
IONIZING RADIATIONS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NUMERICAL DATA
OPENINGS
RADIATION EFFECTS
RADIATIONS
430100* - Particle Accelerators- Design
Development
& Operation