Artículos de revistas
Study of electron acceleration and X-ray radiation as a function of plasma density in capillary-guided laser wakefield accelerators
Fecha
2013-08Registro en:
Ju, L.; Svensson, K.; Ferrari, Hugo Emilio; Döpp, A.; Cassou, K.; et al.; Study of electron acceleration and X-ray radiation as a function of plasma density in capillary-guided laser wakefield accelerators; American Institute Of Physics; Physics Of Plasmas; 20; 8; 8-2013; 83106-83115
1070-664X
CONICET Digital
CONICET
Autor
Ju, L.
Svensson, K.
Ferrari, Hugo Emilio
Döpp, A.
Cassou, K.
Genoud, G.
Wojda, F.
Burza, M.
Persson, A.
Lundh, O.
Wahlström, C. G.
Cros, B.
Resumen
Laser wakefield electron acceleration in the blow-out regime and the associated betatron X-rayradiation were investigated experimentally as a function of the plasma density in a configuration where the laser is guided. Dielectric capillary tubes were employed to assist the laser keeping self-focused over a long distance by collecting the laser energy around its central focal spot. With a 40 fs, 16 TW pulsed laser, electron bunches with tens of pC charge were measured to be accelerated to an energy up to 300 MeV, accompanied by X-ray emission with a peak brightness of the order of 10 21 ph/s/mm 2 / mrad 2 /0.1%BW. Electron trapping and acceleration were studied using the emitted X-ray beamdistribution to map the acceleration process; the number of betatron oscillations performed by theelectrons was inferred from the correlation between measured X-ray fluence and beam charge. A studyof the stability of electron and X-ray generation suggests that the fluctuation of X-ray emission can be reduced by stabilizing the beam charge. The experimental results are in good agreement with 3D particle-in-cell (PIC) simulation.