Abstract
The stability of beams of laser wakefield accelerated electrons in dielectric capillary tubes is experimentally investigated. These beams are found to be more stable in charge and pointing than the corresponding beams of electrons accelerated in a gas jet. Electron beams with an average charge of 43 pC and a standard deviation of 14% are generated. The fluctuations in charge are partly correlated to fluctuations in laser pulse energy. The pointing scatter of the electron beams is measured to be as low as 0.8 mrad (rms). High laser beam pointing stability improved the stability of the electron beams.
Highlights
The stability of beams of laser wakefield accelerated electrons in dielectric capillary tubes is experimentally investigated
First proposed in 1979 [1], appear promising as sources of highly relativistic electrons and associated X-ray radiation, in particular since experiments have demonstrated the possibility of generating highquality quasimonoenergetic pulses of electrons [2,3,4]
Laser wakefield accelerators benefit from the much higher electric field that can be sustained in electron plasma waves compared to conventional accelerators, and hold promise for size and cost reduction
Summary
The stability of beams of laser wakefield accelerated electrons in dielectric capillary tubes is experimentally investigated. In this paper we report on a study of the stability of beams of laser-plasma accelerated electrons using dielectric capillary tubes as laser waveguides.
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