Anode spot: a review of experimental work and suggested areas for future investigation
The anode spot in vacuum arcs is discussed; presently available experimental work and desirable areas for future work are examined. The following subjects are discussed: the transition of the arc into the anode spot mode; the temperature of the anode before, during, and after formation of an anode spot; and anode ions. Under appropriate experimental conditions formation of an anode spot may be preceded by the formation of an anode footpoint. This footpoint is luminous, but much cooler than a true anode spot. A fully developed anode spot has a temperature near the atmospheric boiling point of the anode material and is a copious source of vapor and energetic ions. A need exists for temperature measurements on anode spots in dc arcs. No measurements have been made on anode spots in arcs with rectangular current pulses whose durations are in the millisecond range, so measurements on any parameters of anode spots in such arcs would be desirable. 2 figures, 9 tables, 34 references.
- Research Organization:
- General Electric Co., St. Petersburg, FL (USA). Neutron Devices Dept.
- DOE Contract Number:
- EY-76-C-04-0656
- OSTI ID:
- 6798297
- Report Number(s):
- GEPP-394
- Country of Publication:
- United States
- Language:
- English
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