Enhancement of x-rays generated by a guided laser wakefield accelerator inside capillary tubes

J. Ju*, K. Svensson, A. Döpp, H. E. Ferrari, K. Cassou, O. Neveu, G. Genoud, F. Wojda, M. Burza, A. Persson, O. Lundh, C. G. Wahlström, B. Cros

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

19 Citations (Scopus)

Abstract

Electrons accelerated in the nonlinear regime in a laser wakefield accelerator experience transverse oscillations inside the plasma cavity, giving rise to ultra-short pulsed x-rays, also called the betatron radiation. We show that the fluence of x-ray can be enhanced by more than one order of magnitude when the laser is guided by a 10 mm long capillary tube instead of interacting with a 2 mm gas jet. X-rays with a synchrotron-like spectrum and associated critical energy ∼ 5 keV, with a peak brightness of ∼ 1 × 10 21 ph/s/mm 2/mrad 2+/0.1BW, were achieved by employing 16 TW laser pulses.

Original languageEnglish
Article number191106
JournalApplied Physics Letters
Volume100
Issue number19
DOIs
Publication statusPublished - 7 May 2012
MoE publication typeNot Eligible

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