Corona preionization assembly for a gas laser
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United States of America Patent
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Jun 29, 2004
Issued Date -
N/A
app pub date -
Oct 19, 2000
filing date -
Feb 10, 1999
priority date (Note) -
Expired
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Abstract
A preionization device for a gas laser includes an internal preionization electrode having a dielectric housing around it such that the preionization device is of corona type. The internal electrode connects to advantageous electrical circuitry, preferably external to the discharge chamber via a conductive feedthrough. The circuitry reduces the voltage across the dielectric tube of the preionization unit to reduce over-flashing at tube ends and oscillations due to residual energies stored in the dielectric. A semi-transparent mesh electrode between the preionization unit and the discharge area prevents field distortions and discharge instabilities.
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