X-ray Polarization Measurements of Dense Plasmas Heated by Fast Electrons

N. Booth*, R. J. Clarke, P. Gallegos, L. A. Gizzi, G. Gregori, P. Koester, L. Labate, T. Levato, B. Li, M. Makita, J. Pasley, P. P. Rajeev, D. Riley, E. Wagenaars, J. N. Waugh, N. C. Woolsey

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The detailed knowledge of fast electron energy transport following interaction with high-intensity, ultra-short laser pulses is a key area for secondary source generation for ELI. We demonstrate polarization spectroscopy at laser intensities up to 10(21) Wcm(-2). This is significant as it suggests that in situ emission spectroscopy may be used as an effective probe of fast electron velocity distributions in regimes relevant to electron transport in solid targets. Ly-alpha doublet emission of nickel (Z = 28) and sulphur (Z = 16) is observed to measure the degree of polarization from the Ly-alpha(1) emission. Ly-alpha(2) emission is unpolarized, and as such acts as a calibration source between spectrometers. The measured ratio of the X-ray sigma- and pi-polarization allows the possibility to infer the velocity distribution function of the fast electron beam.

Original languageEnglish
Title of host publicationLIGHT AT EXTREME INTENSITIES: OPPORTUNITIES AND TECHNOLOGICAL ISSUES OF THE EXTREME LIGHT INFRASTRUCTURE
EditorsD Dumitras
Place of PublicationMELVILLE
PublisherAMER INST PHYSICS
Pages79-85
Number of pages7
ISBN (Print)978-0-7354-0771-8
Publication statusPublished - 2010
Event1st International Conference on Light at Extreme Intensities (LEI 2009) - Brasov, Romania
Duration: 16 Oct 200921 Oct 2009

Publication series

NameAIP Conference Proceedings
PublisherAMER INST PHYSICS
Volume1228
ISSN (Print)0094-243X

Conference

Conference1st International Conference on Light at Extreme Intensities (LEI 2009)
CountryRomania
Period16/10/200921/10/2009

Keywords

  • X-ray Polarization
  • Fast Electrons
  • Electron Velocity Distribution Function
  • SPECTROSCOPY

Cite this

Booth, N., Clarke, R. J., Gallegos, P., Gizzi, L. A., Gregori, G., Koester, P., Labate, L., Levato, T., Li, B., Makita, M., Pasley, J., Rajeev, P. P., Riley, D., Wagenaars, E., Waugh, J. N., & Woolsey, N. C. (2010). X-ray Polarization Measurements of Dense Plasmas Heated by Fast Electrons. In D. Dumitras (Ed.), LIGHT AT EXTREME INTENSITIES: OPPORTUNITIES AND TECHNOLOGICAL ISSUES OF THE EXTREME LIGHT INFRASTRUCTURE (pp. 79-85). (AIP Conference Proceedings; Vol. 1228). AMER INST PHYSICS.