Theoretical analysis of electron-beam-excited KrF laser performance: New F2concentration optimization |
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| Authors: | Kannari F. Suda A. Yamaguchi S. Obara M. Fujioka T. |
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| Affiliation: | Engineering, Faculty if Science and Technology, Keio University, Yokohama, Japan; |
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| Abstract: | For an electron-beam-excited KrF laser, we analyzed theoretically the dependence of the performance characteristics on the excitation rate and initial F2concentration. According to the analysis of KrF* formation processes, KrF* relaxation processes, 248 nm absorption processes, and their individual efficiencies, a novel optimization method for initial F2concentrations is necessary instead of a conventional method of a "constant" F2burn-up rate. Then, we determined optimum F2concentration as a function of the excitation rate for excitation pulses of 20-500 ns FWHM. Finally, we obtained the scaling law for the intrinsic KrF laser efficiency. |
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