M P Kamath
Articles written in Pramana – Journal of Physics
Volume 55 Issue 5-6 November 2000 pp 789-795 Laser Plasmas, Contributed Papers
An investigation of x-ray emission from Cu plasma produced by 1.054 µm Nd:glass laser pulses of 5 ns duration, at 2 × 1012 − 2 × 1013 W cm−2 is reported. The x-ray emission has been studied as a function of target position with respect to the laser beam focus position. It has been observed that x-ray emissions from ns duration plasma show a volume effect similar to subnanosecond plasmas. Due to this effect the x-ray yield increases when target is moved away relative to the best focal plane of the laser beam. This result supports the theoretical model of Tallents and has also been testified independently using suitably modified theoretical model for our experimental conditions. While above result is in good agreement with similar experimental results obtained for sub-nanosecond laser produced plasmas, it differs from result claiming filamentation rather than pure geometrical effect leading to x-ray enhancement for ns plasmas.
Volume 55 Issue 5-6 November 2000 pp 797-802 Laser Plasmas, Contributed Papers
The x-ray emission from slab targets of copper irradiated by Nd:glass laser (1.054
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