Laser driven ion acceleration from ultra thin foils in the ultra relativistic intensity regime

R. Prasad, S. Ter-Avetisyan, D. Doria, K. E. Quinn, L. Romagnani, P. S. Foster, C. M. Brenner, J. S. Green, A.P.L. Robinson, P. Gallegos, M. J.V. Streeter, D.C. Carroll, O. Tresca, N. Dover, C. A.J. Palmer, J. Schreiber, D. Neely, Z. Najmudin, P. McKenna, M. ZepfM. Borghesi

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Abstract

The measurements reported here provide scaling laws for the acceleration process in the ultra-short regime and access ion acceleration conditions never investigated before. The scaling of accelerated ion energies was studied by varying a number of parameters such as target thickness (down to 10 nm), target material (C and Al) and laser light polarization (circular and linear) at normal laser incidence. A pronounced increase in the C6+ ion energy up to ~238 MeV has been observed for ultrathin (10-100 nm) carbon targets. Furthermore, it is seen that measured peak proton energies of about 20 MeV are observed almost independently from the target thickness over a wide range (10 nm-10 µm), and the target material (insulator and conductor) and laser polarisation doesn’t play a significant role on the maximum proton energy for target thicknesses < 50 nm. The results can be explained by the specific electron dynamics at ultra-high contrast and ultra-intense laser target irradiation. 2D PIC simulations are in good agreement with the experimental findings.
Original languageEnglish
Title of host publication38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts
Place of PublicationMulhouse, France
Number of pages4
Volume35G
Publication statusPublished - 1 Dec 2011
Event38th EPS Conference on Plasma Physics 2011, EPS 2011 - Strasbourg, France
Duration: 27 Jun 20111 Jul 2011

Conference

Conference38th EPS Conference on Plasma Physics 2011, EPS 2011
CountryFrance
CityStrasbourg
Period27/06/111/07/11

Keywords

  • ion acceleration
  • lasers
  • ultra thin foils
  • charged-particle radiography
  • high energy density matter
  • proton therapy

Cite this

Prasad, R., Ter-Avetisyan, S., Doria, D., Quinn, K. E., Romagnani, L., Foster, P. S., Brenner, C. M., Green, J. S., Robinson, A. P. L., Gallegos, P., Streeter, M. J. V., Carroll, D. C., Tresca, O., Dover, N., Palmer, C. A. J., Schreiber, J., Neely, D., Najmudin, Z., McKenna, P., ... Borghesi, M. (2011). Laser driven ion acceleration from ultra thin foils in the ultra relativistic intensity regime. In 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts (Vol. 35G). [O4.214].