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50 J discharge-pumped XeCl laser

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4 Author(s)
T. Hasama ; Electrotech. Lab., Ibaraki, Japan ; K. Miyazaki ; K. Yamada ; T. Sato

An X-ray preionized XeCl laser with a wide aperture of 10×10 cm2 is described. The density for preionization electrons is estimated from an X-ray energy distribution to be greater than 6×109 cm-3 under operational gas conditions. In high pressure operation at 4500 torr, sufficient preionization has led to successful discharge-breakdown at a low E/N of 6.4×10-17 V-cm2, resulting in a high electrical efficiency of 3.1% with an output energy of 17.6 J. An output energy of 50 J in an 85-ns (FWHM) optical pulse has been extracted from an active volume of about 10:1 for a pulse-forming-line (PFL) voltage of 400 kV. The effects of impedance transformation of a pulse-transmission-line (PTL) following the PFL have been investigated using two types of PTL with output impedances of 0.26 and 0.48 Ω

Published in:

IEEE Journal of Quantum Electronics  (Volume:25 ,  Issue: 1 )