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    • Keywords


      Carbon nanotubes; intense femtosecond lasers; X-rays; local field enhancement.

    • Abstract


      Efficient low debris hard X-ray source based on multiwalled carbon nanotubes (MWNT) irradiated by intense, femtosecond laser over an intensity range of $10^{15} –10^{17}$ W cm$^{−2} \mu𝑚^{2}$ is reported. The MWNT targets yield two orders of magnitude higher X-rays (indicating significant enhancement of laser coupling) and three orders of magnitude lower debris compared to conventional metallic targets under identical experimental conditions. The simple analytical model explains the basic experimental observations and also serves as a guide to design efficient targets to achieve low-debris laser plasma-based hard X-ray sources at low laser intensities suitable for multi-kHz operation.

    • Author Affiliations


      Suman Bagchi1 2 P Prem Kiran1 2 M K Bhuyan1 M Krishnamurthy1 K Yang3 A M Rao3 G Ravindra Kumar1

      1. Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005, India
      2. Advanced Centre of Research in High Energy Materials, University of Hyderabad, Hyderabad 500 046, India
      3. Department of Physics & Astronomy, Clemson University, Clemson, South Carolina 29634, USA
    • Dates

  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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