CALCULATIONS OF A HIGH-GAIN RECOMBINATION X-RAY LASER AT 4.55-NM

Detailed theoretical investigations of a hydrogenlike magnesium recomb ination laser at 4.55 nm (the n = 3 --> 2 Balmer alpha transition) pro duced by psec and sub-psec laser pulses irradiating fiber targets are presented. Shorter pulses are shown to produce larger x-ray laser gain with less pumping laser energy.