EXPERIMENTAL STUDY ON A 100J LEVEL XeCl LASER PUMPED BY INTENSE RELATIVISTIC ELECTRON BEAM
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J. R. Liu,
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R. F. Sun,
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A. C. Qiu,
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X. Yuan,
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Y. G. Gan,
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X. H. Wang,
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Y. M. Zhang,
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X. Q. Zhao,
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S. Q. Ren,
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L. Nie,
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D. S. Yao,
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L. G. Wang,
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M. Zheng,
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Y. M. Wei,
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L. H. Wang
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Abstract
A 100J level XeCl laser pumped by an intense relativistic electron beam -FLASH IT was constructed at Northwest Institute of Nuclear Technology. The cathode of diode for laser pumping is a 15cm x 60cm multi -point copper plate of graphite plate. The anode and pressure foils are both 25 micron Ti. The voltage of diode is measured to be 650-750kV and the current 290-350 kA. The pump power density ranges between 1.5-2.0MW/cm3. The aperture of laser cell is 20cm × 20cm and the effective excitation volume is 24 liters. We have obtained the laser output energy of 136J with a parallel-plane resonator and l.5mrad divergence angle from an unstable resonator. The laser power is measured to be more than 109W.
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