Mass selection in laser-plasma ion accelerator on nanostructured surfaces

Research output: Contribution to journalArticle

Abstract

When an intense laser pulse interacts with a solid surface, ions get accelerated in the laser-plasma due to the formation of transient longitudinal electric field along the target normal direction. However, the acceleration is not mass-selective. The possibility of manipulating such ion acceleration scheme to enhance the energy of one ionic species (either proton or carbon) selectively over the other species is investigated experimentally using nanopore targets. For an incident laser intensity of approximately 5×1017 W/cm2, we show that the acceleration is optimal for protons when the pore diameter is about 15-20 nm, while carbon ions are optimally accelerated when the pore diameter is close to 40-50 nm. The observed effect is due to tailoring targetry by the pulse pedestal of the laser prior to the arrival of the main pulse.

Details

Authors
  • Malay Dalui
  • Mondira Kundu
  • Subhrangsu Sarkar
  • Sheroy Tata
  • John Pasley
  • P. Ayyub
  • Malathi Krishnamurthy
Organisations
External organisations
  • Tata Institute of Fundamental Research
  • Institute for Plasma Research
  • University of York
  • TIFR Centre for Interdisciplinary Sciences
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Article number010703
JournalPhysics of Plasmas
Volume24
Issue number1
Publication statusPublished - 2017 Jan 1
Publication categoryResearch
Peer-reviewedYes