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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

Lindstrom, C. A., Adli, E., Allen, J. M., An, W., Beekman, C., Clarke, C. I., Clayton, C. E., Corde, S., Doche, A., Frederico, J., Gessner, S. J., Green, S. Z., Hogan, M. J., Joshi, C., Litos, M., Lu, W., Marsh, K. A., Mori, W. B., O'Shea, B. D., Vafaei-Najafabadi, N., and Yakimenko, V.. Measurement of Transverse Wakefields Induced by a Misaligned Positron Bunch in a Hollow Channel Plasma Accelerator. United States: N. p., Web. doi:10.1103/physrevlett.120.124802.
Lindstrom, C. A., Adli, E., Allen, J. M., An, W., Beekman, C., Clarke, C. I., Clayton, C. E., Corde, S., Doche, A., Frederico, J., Gessner, S. J., Green, S. Z., Hogan, M. J., Joshi, C., Litos, M., Lu, W., Marsh, K. A., Mori, W. B., O'Shea, B. D., Vafaei-Najafabadi, N., & Yakimenko, V.. Measurement of Transverse Wakefields Induced by a Misaligned Positron Bunch in a Hollow Channel Plasma Accelerator. United States. doi:10.1103/physrevlett.120.124802.
Lindstrom, C. A., Adli, E., Allen, J. M., An, W., Beekman, C., Clarke, C. I., Clayton, C. E., Corde, S., Doche, A., Frederico, J., Gessner, S. J., Green, S. Z., Hogan, M. J., Joshi, C., Litos, M., Lu, W., Marsh, K. A., Mori, W. B., O'Shea, B. D., Vafaei-Najafabadi, N., and Yakimenko, V.. 2018. "Measurement of Transverse Wakefields Induced by a Misaligned Positron Bunch in a Hollow Channel Plasma Accelerator". United States. doi:10.1103/physrevlett.120.124802. https://www.osti.gov/servlets/purl/1436473.
@article{osti_1436473,
title = {Measurement of Transverse Wakefields Induced by a Misaligned Positron Bunch in a Hollow Channel Plasma Accelerator},
author = {Lindstrom, C. A. and Adli, E. and Allen, J. M. and An, W. and Beekman, C. and Clarke, C. I. and Clayton, C. E. and Corde, S. and Doche, A. and Frederico, J. and Gessner, S. J. and Green, S. Z. and Hogan, M. J. and Joshi, C. and Litos, M. and Lu, W. and Marsh, K. A. and Mori, W. B. and O'Shea, B. D. and Vafaei-Najafabadi, N. and Yakimenko, V.},
abstractNote = {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.},
doi = {10.1103/physrevlett.120.124802},
journal = {Physical Review Letters},
number = 12,
volume = 120,
place = {United States},
year = {2018},
month = {3}
}