To develop a high-power HF chemical laserinitiated by an intense electronbeam, we constructed the coaxial-type Marx generator as an electron-beam initiator of HF lasers and the laser system including the external magnetic field coils for guiding an e-beam transport, and the high pressure relief system.
The stable gas mixing procedure by adding a trace of O
2, and the laser action at a mixing ratio of F
2/0
2/H
2=1/0.3/0.3 and at total pressures of up to 800 Torr have been realized. The maximum HF laser energy obtained is 180J/pulse at an intrinsic efficiency of 200%. The overall efficiency defined by the ratio of the laser energy extracted to the electrical energy stored in the Marx generator is as high as 18.9%. This results clarified high efficiencies of the coaxial Marx generator developed and the H
2/F
2 chemical laser initiated by the electron beam.
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