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

Journal Article · Mon May 07 00:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4712594· OSTI ID:22025542

Ju, J; Doepp, A; Cassou, K; Neveu, O; Cros, B ^[1]; Svensson, K; Genoud, G; Wojda, F; Burza, M; Persson, A; Lundh, O; Wahlstroem, C -G ^[2]; Ferrari, H E ^[3]

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1. Laboratoire de Physique des Gaz et des Plasmas, CNRS-Universite Paris-Sud 11, 91405 Orsay (France)
2. Department of Physics, Lund University, P.O. Box 118, S-22100 Lund (Sweden)
3. Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), 8400 Bariloche (Argentina)

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 {approx}5 keV, with a peak brightness of {approx}1x10{sup 21} ph/s/mm{sup 2}/mrad{sup 2}/0.1%BW, were achieved by employing 16 TW laser pulses.

• OSTI ID: 22025542
• Journal Information: Applied Physics Letters, Vol. 100, Issue 19; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
BETATRON OSCILLATIONS
BRIGHTNESS
CAPILLARIES
ELECTRONS
KEV RANGE
LASERS
NONLINEAR PROBLEMS
PLASMA
PLASMA GUNS
PLASMA JETS
PLASMA WAVES
SYNCHROTRON RADIATION
WAKEFIELD ACCELERATORS
X RADIATION