Towards the Optimisation of Direct Laser Acceleration
| Autor: | A. Davies, Dustin Froula, Alexey Arefiev, Dan Haberberger, Tao Wang, Gerald Williams, Zheng Gong, K. Weichman, Yong Ma, Phil Nilson, Thomas Batson, Amina Hussein, Wolfgang Theobald, Hui Chen, Louise Willingale, R. S. Craxton |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Field (physics) General Physics and Astronomy FOS: Physical sciences Plasma Electron Laser 01 natural sciences Physics - Plasma Physics 010305 fluids & plasmas Pulse (physics) law.invention Magnetic field Plasma Physics (physics.plasm-ph) Acceleration law Picosecond 0103 physical sciences Atomic physics 010306 general physics |
| Popis: | Experimental measurements using the OMEGA EP laser facility demonstrated direct laser acceleration (DLA) of electron beams to (505 $\pm$ 75) MeV with (140 $\pm$ 30)~nC of charge from a low-density plasma target using a 400 J, picosecond duration pulse. Similar trends of electron energy with target density are also observed in self-consistent two-dimensional particle-in-cell simulations. The intensity of the laser pulse is sufficiently large that the electrons are rapidly expelled from along the laser pulse propagation axis to form a channel. The dominant acceleration mechanism is confirmed to be DLA and the effect of quasi-static channel fields on energetic electron dynamics is examined. A strong channel magnetic field, self-generated by the accelerated electrons, is found to play a comparable role to the transverse electric channel field in defining the boundary of electron motion. 21 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|