ABSTRACT
Abstract. The use of CPA laser pulses of less than 50 fs duration and power above 30 TW may permit conditions for x-ray lasers where in solid state dense heavy nuclei materials K-shell electrons are emitted by irradiation of 5 MeV protons with subsequent transition of L-shell electrons into the Kshell level. Alternatively, if the L-shell emission dominates, M-L-x-ray laser operation may be interesting. The CPA laser pulses are used to produce plane plasma blocks of several wave length thickness where space charge neutral 5 MeV proton beams of 1011 Amps/cm2 current densities are moving co-axially into the heavy nuclei material.
