PAC2013 - List of Authors (Reimann, O.)

Paper	Title	Page
MOPAC02	Electron and Positron Bunch Self-modulation Experiments at SLAC-FACET	84
	P. Muggli MPI, Muenchen, Germany E. Adli, S.J. Gessner, M.J. Hogan, S.Z. Li, M.D. Litos SLAC, Menlo Park, California, USA Y. Fang USC, Los Angeles, California, USA C. Joshi, K.A. Marsh, W.B. Mori, N. Vafaei-Najafabadi UCLA, Los Angeles, California, USA N.C. Lopes, L.O. Silva, J. Vieira Instituto Superior Tecnico, Lisbon, Portugal O. Reimann MPI-P, München, Germany
	A self-modulated proton-driven plasma wakefield acceleration experiment is being designed at CERN and will occur within 3-5 years. Uncompressed 20GeV lepton bunches currently available at SLAC-FACET could be used to test key physics of the CERN experiment (e.g. self-modulation instability (SMI), SMI seeding, ion motion, hosing, differences between electrons (e-) and positrons (e+), etc). The E-209 collaboration was formed to carry SMI experiments at SLAC-FACET. Here we show through full-scale Osiris simulations that electron self-modulation grows and saturates in less than 10cm. Wakefield excitation in the blowout regime leads to acceleration gradients in excess of 20GeV/m. The self-modulated e^- bunch then sustains stable wakefields over meter-long plasmas. As a result, 7(12)GeV e^- energy gain(loss) could be observed. In the blowout regime, most of the wakefield phase defocuses e+. Thus, uncompressed e⁺ bunches drive lower acceleration gradients, but still in excess of 10GeV/m, over 1m of plasma. We will discuss the experimental setup, diagnostics to measure SMI (e.g. CTR, energy spectrometer, OTR, etc) and expected results. First experimental results may also be available. J. Vieira et al., Phys. Plasmas 19, 063105 (2012).

Paper

Title

Page

Electron and Positron Bunch Self-modulation Experiments at SLAC-FACET

84

P. Muggli
MPI, Muenchen, Germany
E. Adli, S.J. Gessner, M.J. Hogan, S.Z. Li, M.D. Litos
SLAC, Menlo Park, California, USA
Y. Fang
USC, Los Angeles, California, USA
C. Joshi, K.A. Marsh, W.B. Mori, N. Vafaei-Najafabadi
UCLA, Los Angeles, California, USA
N.C. Lopes, L.O. Silva, J. Vieira
Instituto Superior Tecnico, Lisbon, Portugal
O. Reimann
MPI-P, München, Germany

A self-modulated proton-driven plasma wakefield acceleration experiment is being designed at CERN and will occur within 3-5 years. Uncompressed 20GeV lepton bunches currently available at SLAC-FACET could be used to test key physics of the CERN experiment (e.g. self-modulation instability (SMI), SMI seeding, ion motion, hosing, differences between electrons (e-) and positrons (e+), etc)*. The E-209 collaboration was formed to carry SMI experiments at SLAC-FACET. Here we show through full-scale Osiris simulations that electron self-modulation grows and saturates in less than 10cm. Wakefield excitation in the blowout regime leads to acceleration gradients in excess of 20GeV/m. The self-modulated e^- bunch then sustains stable wakefields over meter-long plasmas. As a result, 7(12)GeV e^- energy gain(loss) could be observed. In the blowout regime, most of the wakefield phase defocuses e+. Thus, uncompressed e⁺ bunches drive lower acceleration gradients, but still in excess of 10GeV/m, over 1m of plasma. We will discuss the experimental setup, diagnostics to measure SMI (e.g. CTR, energy spectrometer, OTR, etc) and expected results. First experimental results may also be available.
*J. Vieira et al., Phys. Plasmas 19, 063105 (2012).