Effect of wavelength on absorption and ionization of laser-produced plasmas in magnetic fields with allowance for finite-range ionization and recombination

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Abstract
Radiation absorption and bulk ionization efficiencies are considered in a one-dimensional hydrodynamic approximation by taking finite-rate ionization and recombination processes into account. The magnetic field effect on the plasma motion is taken into account by assuming that the plasma remains diamagnetic during its spherical expansion phase. At the moderate laser flux intensities and associated corona temperatures considered classical absorption is the dominating energy transfer mechanism, and the shorter wavelength the better are the attainable absorption and ionization efficiencies. However, even at anomalous absorption rates manifested by complete energy damping at the critical density, pellet thermalization and bulk ionization are found to be more efficient at shorter wavelengths.