Gas laser apparatus
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United States of America Patent
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Nov 19, 1991
Grant Date -
N/A
app pub date -
May 4, 1990
filing date -
May 6, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A discharge device, especially for a gas laser, has a discharge chamber through which a gas flows at high velocity and the gas discharge burns as a steady-field discharge between an anode and a cathode lying opposite the anode as the main electrodes extending transversely of the gas flow. To obtain a high ionization rate with a low alternating-current power consumption, while at the same time pre-ionizing the entire volume of incoming gas present between the cathode and anode, at least two pre-ionizing electrodes are present, one of which is in front of the cathode and the other in front of the anode in the direction of flow, and the pre-ionizing electrodes are out of phase with one another.
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