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Title: Investigation of ionization-induced electron injection in a wakefield driven by laser inside a gas cell

Ionization-induced electron injection was investigated experimentally by focusing a driving laser pulse with a maximum normalized potential of 1.2 at different positions along the plasma density profile inside a gas cell, filled with a gas mixture composed of 99%H2+1%N2. Changing the laser focus position relative to the gas cell entrance controls the accelerated electron bunch properties, such as the spectrum width, maximum energy, and accelerated charge. Simulations performed using the 3D particle-in-cell code WARP with a realistic density profile give results that are in good agreement with the experimental ones. Lastly, we discuss the interest of this regime for optimizing the bunch charge in a selected energy window.
Authors:
 [1] ; ORCiD logo [2] ;  [1] ;  [1] ;  [1] ;  [3] ;  [4] ;  [4] ;  [2] ;  [2] ;  [2] ;  [3] ; ORCiD logo [3] ;  [2] ;  [2] ;  [1]
  1. Univ. Paris-Sud, Orsay (France). Lab. de Physique des Gaz et des Plasmas, CNRS
  2. Lund Univ. (Sweden). Dept. of Physics
  3. Univ. Paris-Saclay, Gif-sur-Yvette (France); Alternative Energies and Atomic Energy Commission (CEA), Saclay (France). Lab. Interactions, Dynamique et Lasers (LIDyL)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; 2012-032TELISA; 284464; 312453
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 2; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Swedish Research Council (SRC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Focal points; Charge injection; Plasma waves; Particle-in-cell method; Electric fields
OSTI Identifier:
1379064
Alternate Identifier(s):
OSTI ID: 1238203