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 language | English |
---|---|
Article number | 191106 |
Journal | Applied Physics Letters |
Volume | 100 |
Issue number | 19 |
DOIs | |
Publication status | Published - 7 May 2012 |
MoE publication type | Not Eligible |