Abstract
The advanced wakefield experiment (AWAKE) at CERN is the first proton beam-driven plasma wakefield acceleration experiment. The main goal of AWAKE RUN 1 was to demonstrate seeded self-modulation (SSM) of the proton beam and electron witness beam acceleration in the plasma wakefield. For the AWAKE experiment, a 10-meter-long Rubidium-vapor cell together with a high-power laser for ionization was used to generate the plasma. The plasma wakefield is driven by a 400 GeV/c proton beam extracted from the super proton synchrotron (SPS), which undergoes a seeded self-modulation process in the plasma. The electron witness beam used to probe the wakefields is generated from an S-band RF photo-cathode gun and then accelerated by a booster structure up to energies between 16 and 20 MeV. The first run of the AWAKE experiment revealed that the maximum energy gain after the plasma cell is 2 GeV, and the SSM mechanism of the proton beam was verified. In this paper, we will present the details of the AWAKE electron injector. A comparison of the measured electron beam parameters, such as beam size, energy, and normalized emittance, with the simulation results was performed.
Highlights
TO AWAKEThe Advanced Wakefield Experiment (AWAKE) at CERN studies electron beam acceleration in proton beam-driven plasma wakefields [1, 2]
The electron injector consists of an S-band RF photocathode gun and booster structure
A quadrupole triplet behind the booster structure is used to match the beam for further beam transportation and for the emittance measurements using the quadrupole scan method at higher energies
Summary
The Advanced Wakefield Experiment (AWAKE) at CERN studies electron beam acceleration in proton beam-driven plasma wakefields [1, 2]. The proton beam driver has a momentum of 400 GeV/c, a bunch length of 6-12 cm (RMS), and a transverse beam size of. The plasma is generated in a 10-meter-long heated Rubidium-Vapor source that can reach plasma densities of the order of 1 × 1014 ∼ 1 × 1015 /cm. The laser pulse and the proton beam co-propagate through the vapor source to create the plasma and seed the self modulation within the long proton bunch. In the case of AWAKE, the nominal plasma density is 7 × 1014 /cm, and the maximum accelerating gradient is expected to be on the order of GV/m
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
