Speaker
Jan Mezger
(Max-Planck Institute for Physics)
Description
At AWAKE, self-modulation of a long relativistic proton bunch is used to drive high-amplitude wakefields. As the proton bunch self-modulates while propagating through the 10 m long plasma, the amplitude of the wakefields grows. Measuring the wakefield amplitude directly has not been possible so far. However, as the energy stored in the wakefields is dissipated, some fraction of it is emitted as light. By measuring the intensity of the light, we observe for the first time the growth of the self-modulation process along the plasma. By varying bunch and plasma parameters, we investigate the dependencies of the self-modulation growth. When imposing a density gradient along the plasma, we also observe growth suppression, as predicted by theory.
| Working group | WG3 : Beam-driven plasma acceleration |
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Primary authors
AWAKE collaboration
Jan Mezger
(Max-Planck Institute for Physics)
Co-authors
Marlene Turner
(CERN)
Arthur Clairembaud
(MPP)
Dr
Michele Bergamaschi
(MPP)
Dr
Lucas Ranc
(MPP)
Dr
Jan Pucek
(MPP)
Alban Sublet
Dr
Eugenio Senes
(CERN)
Fern Pannell
(UCL)
Nikita Z. van Gils
(CERN, PARTREC UMCG University of Gröningen)
Dr
Patric Muggli
(Max Planck Institute for Physics)