CERN Accelerating science

Published Articles
Title	Physics of the AWAKE Project
Author(s)	Muggli, Patric (Munich, Max Planck Inst.) ; Öz, Erdem (Munich, Max Planck Inst.) ; Tarkeshian, Roxana (Munich, Max Planck Inst.) ; Bracco, Chiara (CERN) ; Gschwendtner, Edda (CERN) ; Pardons, Ans (CERN) ; Caldwell, Allen (Garching, Max Planck Inst. Plasmaphys.) ; Reimann, Olaf (Garching, Max Planck Inst. Plasmaphys.) ; Lotov, Konstantin (Novosibirsk, IYF) ; Pukhov, Alexander (Heinrich Heine U., Dusseldorf) ; Vieira, Jorge (Lisbon, CFP) ; Wing, Matthew (University Coll. London)
Publication	2013
Number of pages	3
In:	4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.1179
Subject category	Accelerators and Storage Rings
Abstract	The goal of the AWKAKE collaboration is the study of plasma wakefields driven by proton (p⁺) bunches through experiments, simulations and theory. Proton bunches are interesting wakefield drivers because they can be ultra-relativistic (TeVs/p⁺) and carry large amounts of energy (>kJ). It was demonstrated in simulations* that acceleration of an electron (e-) bunch from 10GeV to >500GeV can be achieved in  500m of plasma driven by a 1TeV, 100micron-long, bunch with 10¹¹ p+. Such short p⁺ bunches do not exist today. It was suggested** that a p⁺ bunch long compared to the plasma period can transversely self-modulate and resonantly drive wakefields to large amplitudes ( GV/m). Initial experiments based on self-modulation instability (SMI) will use single 12cm-long CERN SPS bunches with 1-3·10¹¹, 450GeV p⁺ to study physics of SMI. With a plasma density of 7·10¹⁴/cc the plasma wave and modulation period is 1.3mm. The SMI saturates after  3m with amplitude in the GV/m range. Later a low energy ( 10MeV) witness e⁻ bunch will be injected at the SMI saturation point. Energy gain over  7m of plasma can reach the GeV level. Translation from physics to experimental plan and setup will be presented.
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