skip to main content

Title: Refluxed electrons direct laser acceleration in ultrahigh laser and relativistic critical density plasma interaction

Refluxed electrons direct laser acceleration is proposed so as to generate a high-charge energetic electron beam. When a laser pulse is incident on a relativistic critical density target, the rising edge of the pulse heats the target and the sheath fields on the both sides of the target reflux some electrons inside the expanding target. These electrons can be trapped and accelerated due to the self-transparency and the negative longitudinal electrostatic field in the expanding target. Some of the electrons can be accelerated to energies exceeding the ponderomotive limit 1/2a{sub 0}{sup 2}mc{sup 2}. Effective temperature significantly above the ponderomotive scaling is observed. Furthermore, due to the limited expanding length, the laser propagating instabilities are suppressed in the interaction. Thus, high collimated beams with tens of μC charge can be generated.
Authors:
 [1] ;  [2] ; ; ; ; ;  [3] ;  [4]
  1. Department of Physics, Fudan University, Shanghai 210433 (China)
  2. (China)
  3. Science and Technology on Plasma Physics Laboratory, China Academy of Engineering Physics, P.O. Box 919-986, Mianyang 621900 (China)
  4. Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)
Publication Date:
OSTI Identifier:
22408018
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATION; ELECTRON BEAMS; LASER TARGETS; LASERS; PLASMA DENSITY; PLASMA INSTABILITY; PONDEROMOTIVE FORCE; PULSES; RELATIVISTIC RANGE; SCALING; TAIL ELECTRONS; TRAPPED ELECTRONS