Gain Saturation Regime for Laser-Driven Tabletop, Transient Ni-Like Ion X-Ray Lasers
James DunnLawrence Livermore National Laboratory, Livermore, California 94550Yuelin LiInstitute for Laser Science and Applications, Lawrence Livermore National Laboratory, Livermore, California 94550A. L. OsterheldLawrence Livermore National Laboratory, Livermore, California 94550Joseph NilsenLawrence Livermore National Laboratory, Livermore, California 94550James HunterLawrence Livermore National Laboratory, Livermore, California 94550Vyacheslav N. ShlyaptsevDepartment of Applied Science, University of California Davis-Livermore, Livermore, California 94550
2000en
ABI
Аннотация
We have demonstrated small signal gain saturation on several transient-gain Ni-like ion x-ray lasers by using a high-power, chirped-pulse amplification, tabletop laser. These results have been achieved at wavelengths from 139-203 A using a total of 5-7 J energy in a traveling-wave excitation scheme. Strong amplification is also observed for Ni-like Sn at 119 A. Gain of 62 cm(-1) and gL product of 18 are determined on the 4d-->4p transition for Ni-like Pd at 147 A with an output energy of 12 &mgr;J. A systematic evaluation of the laser driver parameters yields optimum beam divergence and small deflection angles of 2-5 mrads, in good agreement with simulations.
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