High intensity atomic spectral lamp with interchangeable cathode

Details High intensity atomic spectral lamp with interchangeable cathode High intensity atomic spectral lamp with interchangeable cathode

1977-06-07

1979-06-19

Demeo, Palmer C.

Electric lamp and discharge devices

Fluent material supply or flow directing means

Plasma

313192, 313237, 356314, H01J 194, H01J 3734, H01J 6106, H01J 6152

Patent

active

041587901

ABSTRACT:
A high intensity atomic spectral lamp having a first set of electrodes including a primary cathode consisting of or comprising a selected element adapted to produce a primary electric discharge which gives rise to an atomic vapor of said element by cathodic sputtering from the primary cathode; a second set of electrodes adapted to produce a secondary electric discharge which passes through the said atomic vapor, to excite the atoms in the vapor to emit radiation characteristic of said element; a window to allow the passage of said radiation out of the lamp, said window being placed in front of the operative surface of the primary cathode; means to pass a stream of inert gas through the lamp close to and across the operative surface of the primary cathode and between the primary cathode and the window in such manner as to sweep away from the vicinity of the primary cathode surface atomic species formed by said primary discharge.
The preferred form of the lamp includes demountable cathode support means to permit ready removal and replacement of the primary cathode.

REFERENCES:
patent: 3433963 (1969-03-01), Walsh et al.
patent: 3517188 (1970-06-01), Sullivan et al.
patent: 3635561 (1972-01-01), Bordonali et al.
patent: 3699383 (1972-10-01), Chaney
patent: 3869643 (1975-03-01), Okagaki

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