Cathode bleed arrangement for electrically excited flowing gas l

Details Cathode bleed arrangement for electrically excited flowing gas l Cathode bleed arrangement for electrically excited flowing gas l

1982-03-29

1985-12-10

Sikes, William L.

Coherent light generators

Particular pumping means

Electrical

372 60, 372 74, 372 58, H01S 3097

Patent

active

045584508

ABSTRACT:
A high power, electrically excited laser is disclosed wherein a laser gas is caused to flow through an excitation region in which an electric discharge is established along a direction transverse to the direction of flow of the laser gas between an anode and a porous cathode disposed on opposite sides of the excitation region, and wherein an electron beam is introduced into the excitation region along a direction parallel to the direction of the discharge. A first quantity of an auxiliary gas (preferably helium) having a normal glow current density at least an order of magnitude less than that of the laser gas is introduced into the upstream end of the excitation region adjacent to the cathode and caused to flow across the cathode surface along a direction parallel to that of the laser gas. A second quantity of the auxiliary gas is "bled" through the porous cathode and gradually added to the auxiliary gas stream flowing across the cathode surface. The auxiliary gas is removed from the laser at the downstream end of the excitation region.

REFERENCES:
patent: 3808551 (1974-04-01), Ahouse
patent: 3842366 (1974-10-01), Gordon et al.
patent: 4024465 (1977-05-01), Farish et al.
patent: 4152672 (1979-05-01), Hundstad
"HF and DF Lasers by Direct Electrical Discharge Excitation", Byron et al., App. Phys. Lett., vol. 23, No. 10, Nov. 15, 1973.

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