Pre-ionizing trigger system for a gas laser
A pair of excitation electrodes in a laser cavity, filled with a gas mixture at substantially atmospheric pressure, are connected across a pumping capacitor by way of part of the winding of an autotransformer in series with a pre-ionizing device within the cavity acting as a trigger switch. The pre-ionizing device comprises a dielectric tube carrying a plurality of axially spaced-apart metal rings constituting a condenser chain, the rings being provided with pointed extensions confronting one another to serve as corona electrodes. Contral pulses applied to a conductor inside the tube cause a spark discharge through the cascaded corona gaps of the trigger-switch with resulting energization of the autotransformer and discharge of the pumping capacitor across the excitation electrodes. The metal rings may be interconnected by high-ohmic resistors establishing a uniform field distribution therebetween.
- Assignee:
- Selenia, Industrie Electtroniche Associate (Italy)
- Patent Number(s):
- US 4450566
- OSTI ID:
- 6209584
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
ATMOSPHERIC PRESSURE
CAPACITORS
ELECTRIC DISCHARGES
ELECTRIC SPARKS
ELECTRICAL EQUIPMENT
ELECTRICAL PUMPING
ELECTRODES
ELECTRONIC CIRCUITS
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
EXCITATION
GAS LASERS
IONIZATION
LASER CAVITIES
LASERS
PULSE CIRCUITS
PULSES
PUMPING
RESISTORS
TRANSFORMERS
TRIGGER CIRCUITS