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      https://www.ias.ac.in/article/fulltext/pram/055/05-06/0797-0802

    • Keywords

       

      Laser plasma; x-ray emission; conversion efficiency; ion velocities

    • Abstract

       

      The x-ray emission from slab targets of copper irradiated by Nd:glass laser (1.054 µm, 5 and 15 ns) at intensities between 1012 and 1011W/cm2 has been studied. The x-ray emissions were monitored with the help of high quantum efficiency x-ray silicon photo diodes and vacuum photo diodes, all covered with aluminium filters of different thickness. The x-ray intensity vs the laser intensity has a scaling factor of (1.2–1.92). The relative x-ray conversion efficiency follows an empirical relationship which is in close agreement with the one reported by Babonneau et al. The ion velocities were monitored using Langmuir probes placed at different angles and radial distances from the target position. The variation of the ion velocity with the laser intensity follows a scaling of the form Φβ where β ∼0.22 which is in good agreement with the reported scaling factor values. The results on the x-ray emission from Cu plasma are reported.

    • Author Affiliations

       

      Y B S R Prasad1 V K Senecha1 H C Pant1 M P Kamath2 G S Solanki2 P K Tripathi2 A P Kulkarni2 S Gupta2 R Pareek2 A S Joshi2 N Sreedhar3 Sameer Nigam3 C P Navathe3

      1. Plasma Physics Laboratory, Centre for Advanced Technology, Indore - 452 013, India
      2. High Power Laser Lab, Centre for Advanced Technology, Indore - 452 013, India
      3. High Power Laser Electronic Group, Laser Plasma Division, Centre for Advanced Technology, Indore - 452 013, India
    • Dates

       
  • Pramana – Journal of Physics | News

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