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Journal Articles Physics of Plasmas Year : 2013

Probing electron acceleration and x-ray emission in laser-plasma accelerators

Cédric Thaury
Kim Ta Phuoc
Sébastien Corde
Guillaume Lambert
M. S. Bloom
  • Function : Author
S. Kneip
  • Function : Author
Victor Malka

Abstract

While laser-plasma accelerators have demonstrated a strong potential in the acceleration of electrons up to giga-electronvolt energies, few experimental tools for studying the acceleration physics have been developed. In this paper, we demonstrate a method for probing the acceleration process. A second laser beam, propagating perpendicular to the main beam, is focused on the gas jet few nanosecond before the main beam creates the accelerating plasma wave. This second beam is intense enough to ionize the gas and form a density depletion, which will locally inhibit the acceleration. The position of the density depletion is scanned along the interaction length to probe the electron injection and acceleration, and the betatron X-ray emission. To illustrate the potential of the method, the variation of the injection position with the plasma density is studied.
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Dates and versions

hal-01163773 , version 1 (13-07-2015)

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Cédric Thaury, Kim Ta Phuoc, Sébastien Corde, P. Brijesh, Guillaume Lambert, et al.. Probing electron acceleration and x-ray emission in laser-plasma accelerators. Physics of Plasmas, 2013, 20 (6), pp.063101. ⟨10.1063/1.4810791⟩. ⟨hal-01163773⟩
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