Natural noise and external wake field seeding in a proton-driven plasma accelerator

Abstract

We discuss the level of natural shot noise in a proton bunch-driven plasma accelerator. The required seeding for the plasma wake field must be larger than the cumulative shot noise. This is the necessary condition for the axial symmetry of the generated wake and the acceleration quality. We develop an analytical theory of the noise field and compare it with multi-dimensional simulations. It appears that the natural noise wake field generated in plasma by the available at CERN super-protons-synchrotron (SPS) bunches is very low, at the level of a few 10 kV/m. This fortunate fact eases the requirements on the seed. Our three dimensional simulations show that even a few tens MeV electron bunch precursor of a very moderate intensity is sufficient to seed the proton bunch self-modulation in plasma.

5 pages, 5 figures

References in corpus (4)

• Self-modulation instability of a long proton bunch in plasmas
• Phase velocity and particle injection in a self-modulated proton-driven plasma wakefield accelerator
• Plasma Wakefield Acceleration with a Modulated Proton Bunch
• Transverse self-modulation of ultra-relativistic lepton beams in the plasma wakefield accelerator

Cited by in corpus (17)

• Experimental observation of proton bunch modulation in a plasma, at varying plasma densities
• Experimental observation of plasma wakefield growth driven by the seeded self-modulation of a proton bunch
• Path to AWAKE: Evolution of the concept
• AWAKE readiness for the study of the seeded self-modulation of a 400\,GeV proton bunch
• Physics of beam self-modulation in plasma wakefield accelerators
• Transition between Instability and Seeded Self-Modulation of a Relativistic Particle Bunch in Plasma
• Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma
• Long-term evolution of broken wakefields in finite radius plasmas
• Parameter sensitivity of plasma wakefields driven by self-modulating proton beams
• Experimental Study of Wakefields Driven by a Self-Modulating Proton Bunch in Plasma
• Proton Driven Plasma Wakefield Acceleration in AWAKE
• Effect of beam emittance on self-modulation of long beams in plasma wakefield accelerators
• First fully kinetic three-dimensional simulation of the AWAKE baseline scenario
• Proton beam self-modulation seeded by electron bunch in plasma with density ramp
• Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
• AWAKE-related benchmarking tests for simulation codes
• Generation of controllable plasma wakefield noise in particle-in-cell simulations