Home > Research > Publications & Outputs > Characterization of electrons and x-rays produc...

Electronic data

  • X-rays vs. Pulse Duration

    Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in Plasma Physics and Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.1088/0741-3335/58/10/105003

    Accepted author manuscript, 5 MB, PDF-document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

View graph of relations

Characterization of electrons and x-rays produced using chirped laser pulses in a laser wakefield accelerator

Research output: Contribution to journalJournal article

Published
  • T. Z. Zhao
  • K. Behm
  • Z-H He
  • A. Maksimchuk
  • J. A. Nees
  • V. Yanovsky
  • A. G. R. Thomas
  • K. Krushelnick
Close
Article number105003
<mark>Journal publication date</mark>10/2016
<mark>Journal</mark>Plasma Physics and Controlled Fusion
Issue number10
Volume58
Number of pages6
StatePublished
Early online date19/08/16
Original languageEnglish

Abstract

The electron injection process into a plasma-based laser wakefield accelerator can be influenced by modifying the parameters of the driver pulse. We present an experimental study on the combined effect of the laser pulse duration, pulse shape, and frequency chirp on the electron injection and acceleration process and the associated radiation emission for two different gas types-a 97.5% He and 2.5% N-2 mixture and pure He. In general, the shortest pulse duration with minimal frequency chirp produced the highest energy electrons and the most charge. Pulses on the positive chirp side sustained electron injection and produced higher charge, but lower peak energy electrons, compared with negatively chirped pulses. A similar trend was observed for the radiant energy. The relationship between the radiant energy and the electron charge remained linear over a threefold change in the electron density and was independent of the drive pulse characteristics. X-ray spectra showed that ionization injection of electrons into the wakefield generally produced more photons than self-injection for all pulse durations/frequency chirp and had less of a spread in the number of photons around the peak x-ray energy.

Bibliographic note

This is an author-created, un-copyedited version of an article accepted for publication/published in Plasma Physics and Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.1088/0741-3335/58/10/105003