Abstract

The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) is a project at CERN aiming to accelerate an electron bunch in a plasma wakefield driven by a proton bunch. The plasma is induced in a 10 m long rubidium vapor cell using a pulsed Ti:Sapphire laser, with the wakefield formed by a proton bunch from the CERN Super Proton Synchrotron (SPS). A 16 MeV electron bunch is simultaneously injected into the plasma cell to be accelerated by the wakefield to energies in the GeV range over this short distance. After successful runs with the proton and laser beams, the electron beam line was installed and commissioned at the end of 2017 to produce and inject a suitable electron bunch into the plasma cell. To achieve the goals of the experiment, it is important to have reliable beam instrumentation measuring the various parameters of the proton, electron and laser beams. This contribution presents the status of the beam instrumentation in AWAKE and reports on the performance achieved during the AWAKE runs in 2017.

Highlights

  • Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) is an experiment that operates at CERN to demonstrate the acceleration of electrons in a plasma driven by high-energy proton bunches [1,2,3]

  • Along with the laser and the proton beams, a 16 MeV electron bunch is simultaneously injected in the plasma cell, where it should be accelerated up to the GeV energy range in a very short distance by the plasma wakefields

  • The high-energy proton bunch has an intensity of ∼ 3 × 1011 protons, while 780 nm laser pulse has a duration of 100 fs and a

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Summary

INTRODUCTION

AWAKE is an experiment that operates at CERN to demonstrate the acceleration of electrons in a plasma driven by high-energy proton bunches [1,2,3]. The co-propagating 400 GeV proton bunch from the SPS interacts with this plasma resulting in a density modulation along the bunch and further enhancement of plasma oscillations through the creation of proton micro-bunches. The frequency of the proton density modulation (the duration of micro-bunches) is between 90300 GHz and is defined by the plasma density which is in the range of 1014 − 1015 electrons/cm. Along with the laser and the proton beams, a 16 MeV electron bunch is simultaneously injected in the plasma cell, where it should be accelerated up to the GeV energy range in a very short distance by the plasma wakefields. The high-energy proton bunch has an intensity of ∼ 3 × 1011 protons, while 780 nm laser pulse has a duration of 100 fs and a

BEAM INSTRUMENTATION SYSTEMS IN
Transverse Profile Measurement
Beam Position Measurement
Temporal Synchronization of the Beams
Electron Bunch Charge Measurement
Optical Line of the Electron Spectrometer
CONCLUSION
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