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Title: Measurement of Transverse Wakefields Induced by a Misaligned Positron Bunch in a Hollow Channel Plasma Accelerator

Hollow channel plasma wakefield acceleration is a proposed method to provide high acceleration gradients for electrons and positrons alike: a key to future lepton colliders. However, beams which are misaligned from the channel axis induce strong transverse wakefields, deflecting beams and reducing the collider luminosity. This undesirable consequence sets a tight constraint on the alignment accuracy of the beam propagating through the channel. Direct measurements of beam misalignment-induced transverse wakefields are therefore essential for designing mitigation strategies. We present the first quantitative measurements of transverse wakefields in a hollow plasma channel, induced by an off-axis 20 GeV positron bunch, and measured with another 20 GeV lower charge trailing positron probe bunch. Furthermore, the measurements are largely consistent with theory.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [3] ;  [4] ;  [4] ;  [2] ;  [5] ;  [2] ;  [2] ;  [3] ;  [6] ;  [7] ;  [3] ;  [3] ;  [2] ;  [8] more »;  [2] « less
  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. SLAC National Accelerator Lab., Menlo Park, CA (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  6. Univ. of Colorado, Boulder, CO (United States)
  7. Tsinghua Univ., Beijing (China)
  8. Univ. of California, Los Angeles, CA (United States); Stony Brook Univ., Stony Brook, NY (United States)
Publication Date:
Grant/Contract Number:
AC02-76SF00515; SC0010064; SC0008491; SC0008316; 230450; PHY-1415386; OCI-1036224; ACI-1339893; PHY-0960344; 715807; 11425521; 11535006; 11175102; 2013CBA01501
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 12; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
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
OSTI Identifier:
1436473