Open AccessEnhancement of x-rays generated by a guided laser wakefield accelerator inside capillary tubes
Author(s) -
J. Ju,
Klas Svensson,
A. Döpp,
H. E. Ferrari,
K. Cassou,
O. Neveu,
Guillaume Genoud,
F. Wojda,
M. Burza,
Anton E. O. Persson,
O. Lundh,
C.-G. Wahlström,
B. Cros
Publication year - 2012
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.4712594
Subject(s) - betatron , laser , plasma acceleration , physics , fluence , synchrotron , optics , synchrotron radiation , electron , particle accelerator , plasma , atomic physics , brightness , nuclear physics , beam (structure)
in Undetermined 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 ∼ 1×1021 ph/s/mm2/mrad2/0.1%BW, were achieved by employing 16 TW laser pulses
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