We have operated a doublehyphen;discharge transversely excited atmospheric pressure (TEA) CO2laser with a Marx bank system at high output energies and efficiencies over a large discharge volume. The typical laser energy output is approximately 17 Jsol;liter at an efficiency of 24percnt; and a pulsehyphen;tohyphen;pulse variation of less than 10percnt;. The parameters that govern the operation of the system are discussed.
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