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- W187640637 abstract "A treatment is described which doubles the pulsed surface flashover potential of some insulator materials in vacuum. The test samples are short solid cylinders 1 cm in length and 6.35 cm in diameter. The flashover potential is measured by placing the sample between brass electrodes in a vacuum chamber at a pressure of 1 micro-Torr and applying a high voltage double exponential pulse with 1.5/135 ..mu..s time constants. The treatment consists of exposing a sample to 80,000 sparks from a spark plug in vacuum. For each material, an untreated and a treated sample are measured under identical conditions, and the results compared. Results on Lexan show an increase in flashover potential from 100 kV/cm to 170 kV/cm (limit of our Marx generator). On the machinable ceramic Macor, the results were 60 kV/cm untreated and 140 kV/cm treated. Surface analysis using Electron Spectroscopy for Chemical Analysis shows that the treatment alters the surface composition of the material. Also, the secondary electron emission coefficient has been measured for treated and untreated samples over a range of incident electron energies. The SEE changes dramatically after treatment. These measurements and the predictions of the existing theoretical model will be discussed." @default.
- W187640637 created "2016-06-24" @default.
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- W187640637 date "1986-09-22" @default.
- W187640637 modified "2023-09-26" @default.
- W187640637 title "A treatment which inhibits surface flashover in vacuum" @default.
- W187640637 hasPublicationYear "1986" @default.
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