NDLI: Self-modulation of ultra-relativistic SLAC electron and positron bunches

Content Provider	IEEE Xplore Digital Library
Author	Muggli, P. Reimann, O. Vieira, J. Lopes, N. Amorim, L. D. Silva, L. Gessner, S. Hogan, M. J. Li, S. Litos, M. Vafaei-Najafabadi, N. Joshi, C. Mori, W. Marsh, K. Adli, E. Olsen, V. K. Berglyd Fang, Y.
Copyright Year	2014
Description	Author affiliation: Instituto Superior Tecnico, Lisbon, Portugal (Vieira, J.; Lopes, N.; Amorim, L. D.; Silva, L.) \|\| Max Planck Institute for Physics, Munich, Germany (Muggli, P.; Reimann, O.) \|\| SLAC, Menlo Park, USA (Gessner, S.; Hogan, M. J.; Li, S.; Litos, M.) \|\| University of Oslo, Norway (Adli, E.; Olsen, V. K. Berglyd) \|\| University of California, Los Angeles, USA (Vafaei-Najafabadi, N.; Joshi, C.; Mori, W.; Marsh, K.) \|\| University of Southern California, Los Angeles, USA (Fang, Y.)
Abstract	Long (L>>λ) charged particle bunches traveling in dense plasmas are subject to a transverse two-stream instability, the self-modulation instability $(SMI)^{1}.$ This instability modulates the bunch in the radial direction with a longitudinal period approximately equal to the plasma wavelength $(λ^{1/2}).$ The SMI can be used to transform a long bunch into a train of short bunches that can resonantly drive wakefields to large amplitudes. An experiment known as $AWAKE^{2}$ was recently approved at CERN to drive GV/m wakefields with 400GeV, ∼12cm-long proton bunches in a 10m plasma with λ∼1mm. In the linear wakefield regime, the plasma response is symmetric for positively and negatively charged bunches. However, once the nonlinear regime is approached the plasma response becomes asymmetric, leading to differences that could be evidenced using the ultra-relativistic electron and positron $bunches^{3}.$ This asymmetry makes it more difficult to accelerate positively than negatively charged particle bunches in plasmas.
Starting Page	1
Ending Page	1
File Size	132050
Page Count	1
File Format	PDF
ISBN	9781479927111
e-ISBN	9781479927135
DOI	10.1109/PLASMA.2014.7012243
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-05-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasmas Positrons Educational institutions Acceleration Transforms Protons
Content Type	Text
Resource Type	Article

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