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Title: Long-range attraction of an ultrarelativistic electron beam by a column of neutral plasma

Here, we report on the experimental observation of the attraction of a beam of ultrarelativistic electrons towards a column of neutral plasma. In experiments performed at the FACET test facility at SLAC we observe that an electron beam moving parallel to a neutral plasma column, at an initial distance of many plasma column radii, is attracted into the column. Once the beam enters the plasma it drives a plasma wake similar to that of an electron beam entering the plasma column head-on. A simple analytical model is developed in order to capture the essential physics of the attractive force. The attraction is further studied by 3D particle-in-cell numerical simulations. The results are an important step towards better understanding of particle beam–plasma interactions in general and plasma wakefield accelerator technology in particular.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ; ORCiD logo [2] ;  [2] ;  [2] ;  [2] ;  [2] ; ORCiD logo [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4] ;  [5]
  1. Univ. of Oslo, Oslo (Norway)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Univ. of California, Los Angeles, CA (United States)
  4. Univ. Paris-Saclay, Palaiseau (France)
  5. Tsinghua Univ., Beijing (People's Republic of China)
Publication Date:
OSTI Identifier:
1328717
Grant/Contract Number:
PHY-1415386; 217 AC02-76SF00515; SC0010064
Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 18; Journal Issue: 10; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; electron beams; plasma physics; plasma wakefield acceleration; transverse beam dynamics; FACET user facility