Highly collimated electron acceleration by longitudinal laser fields in a hollow channel
ORAL
Abstract
A longitudinal electric field is associated with the transverse profile of a laser pulse. Exploiting this longitudinal laser electric field, a novel mechanism to achieve collimated super-ponderomotive electron acceleration is proposed. To realize efficient acceleration, a tailored hollow-core target is used to suppress diffraction and enhance the longitudinal laser electric field. In addition, this structure eliminates the net restoring force that produces transverse electron oscillations in laser-generated ion channels, allowing for improved collimation of accelerated electrons. We use two-dimensional particle-in-cell simulation to demonstrate how energy is transferred from the laser to the electrons.
*This research was supported in part by the National Science Foundation under Grant No. 1632777 and used the particle-in-cell code EPOCH, which is funded in part by the UK EPSRC grants EP/G054950/1, EP/G056803/1, EP/G055165/1 and EP/ M022463/1. Simulations were performed using HPC resources of the Texas Advanced Computing Center at the University of Texas at Austin.
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Presenters
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Zheng Gong
- Univ of Beijing/Univ of Texas - Austin
- Univ of Texas - Austin / Univ of Beijing