Göttingen 2012 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 88: Beschleunigerphysik 10
T 88.6: Vortrag
Freitag, 2. März 2012, 09:45–10:00, VG 1.104
Self-modulation of long electron beams in plasma at PITZ — •Alberto Martínez de la Ossa1, Matthias Gross2, Martin Khojoyan2, Mikhail Krasilnikov2, Anne Oppelt2, Frank Stephan2, Florian Grüner3, Carl Schroeder4, and Jens Osterhoff3 — 1DESY, Hamburg, Germany — 2DESY, Zeuthen, Germany — 3University of Hamburg, Germany — 4Lawrence Berkeley National Laboratory, USA
Beam-driven plasma wakefield acceleration has generated a high scientific interest since it was experimentally proven that electrons can be accelerated up to energies close to 100 GeV in less than a meter of propagation in plasma. Recently, it has been proposed to use the high energetic proton beams from the CERN SPS to drive a plasma wave which is able to accelerate electron beams to TeV energy regime. The whole project relies on the fact that a long proton bunch (L>λp) is self-modulated through its propagation in plasma, splitting itself in ultrashort sub-bunches of length ∼λp which resonantly drive the plasma wave. The Photo Injector Test facility at DESY, Zeuthen site (PITZ), offers the unique possibility to study and demonstrate the self-modulation of long electron bunches in plasma. A set of numerical simulations with the particle-in-cell code Osiris have been carried out to optimize some of the parameters of the experiment like the electron bunch profile, the plasma density and the propagation length in plasma, and constrain other physical effects which can spoil the optimal excitation of the plasma wave like dephasing, hosing instability and plasma density perturbations.