Hollow cathode apparatus

Electric lamp and discharge devices: systems – Discharge device load with fluent material supply to the... – Electron or ion source

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Details

31511131, 313131A, 250426, H01J 2702

Patent

active

044750633

ABSTRACT:
A hollow cathode apparatus is described, which can be rapidly and reliably started. An ignitor (30) positioned upstream from the hollow cathode (20), generates a puff of plasma (36) that flows with the primary gas to be ionized through the cathode. The plasma puff creates a high voltage breakdown between the downstream end (24) of the cathode and a keeper electrode (32), to heat the cathode to an electron-emitting temperature.

REFERENCES:
patent: 3253180 (1966-05-01), Huber
patent: 3523210 (1970-08-01), Ernstene et al.
patent: 3678334 (1972-07-01), Dugdale et al.
patent: 3944873 (1976-03-01), Franks et al.
patent: 3997756 (1976-12-01), Bykhovsky et al.
patent: 4060748 (1977-11-01), Bayless
patent: 4264844 (1981-04-01), Axe et al.
patent: 4301391 (1981-11-01), Seliger et al.
patent: 4339691 (1982-07-01), Morimiya et al.

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