Cargando…

Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch

In plasma wakefield accelerators (e.g. AWAKE) the proton bunch self-modulation is seeded by the ionization front of a high-power laser pulse ionizing a vapour and by the resulting steep edge of the driving bunch profile inside the created plasma. In this paper, we present calculations in 2D linear t...

Descripción completa

Detalles Bibliográficos
Autores principales: Hüther, Mathias, Muggli, Patric
Lenguaje:eng
Publicado: 2018
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.nima.2018.02.084
http://cds.cern.ch/record/2308408
_version_ 1780957705694871552
author Hüther, Mathias
Muggli, Patric
author_facet Hüther, Mathias
Muggli, Patric
author_sort Hüther, Mathias
collection CERN
description In plasma wakefield accelerators (e.g. AWAKE) the proton bunch self-modulation is seeded by the ionization front of a high-power laser pulse ionizing a vapour and by the resulting steep edge of the driving bunch profile inside the created plasma. In this paper, we present calculations in 2D linear theory for a concept of a different self-modulation seeding mechanism based on electron injection. The whole proton bunch propagates through a preformed plasma and the effective beam current is modulated by the external injection of a short electron bunch at the centre of the proton beam. The resulting sharp edge in the effective beam current in the trailing part of the proton bunch is driving large wakefields that can lead to a growth of the seeded self-modulation (SSM). Furthermore, we discuss the feasibility for applications in AWAKE Run 2. •Instead of seeding the proton-bunch SMI with a laser pulse, a short electron pulse can be used.•The steep rising edge of the effective charge density drives large amplitude wakefields.•The approach could be also a concept for Run 2 of the AWAKE-Experiment.
id cern-2308408
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2018
record_format invenio
spelling cern-23084082023-09-29T02:56:16Zdoi:10.1016/j.nima.2018.02.084http://cds.cern.ch/record/2308408engHüther, MathiasMuggli, PatricSeeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunchphysics.acc-phAccelerators and Storage Ringsphysics.plasm-phOther Fields of PhysicsIn plasma wakefield accelerators (e.g. AWAKE) the proton bunch self-modulation is seeded by the ionization front of a high-power laser pulse ionizing a vapour and by the resulting steep edge of the driving bunch profile inside the created plasma. In this paper, we present calculations in 2D linear theory for a concept of a different self-modulation seeding mechanism based on electron injection. The whole proton bunch propagates through a preformed plasma and the effective beam current is modulated by the external injection of a short electron bunch at the centre of the proton beam. The resulting sharp edge in the effective beam current in the trailing part of the proton bunch is driving large wakefields that can lead to a growth of the seeded self-modulation (SSM). Furthermore, we discuss the feasibility for applications in AWAKE Run 2. •Instead of seeding the proton-bunch SMI with a laser pulse, a short electron pulse can be used.•The steep rising edge of the effective charge density drives large amplitude wakefields.•The approach could be also a concept for Run 2 of the AWAKE-Experiment.In plasma wakefield accelerators (e.g. AWAKE) the proton bunch self-modulation is seeded by the ionization front of a high-power laser pulse ionizing a vapour and by the resulting steep edge of the driving bunch profile inside the created plasma. In this paper, we present calculations in 2D linear theory for a concept of a different self-modulation seeding mechanism based on electron injection. The whole proton bunch propagates through a preformed plasma and the effective beam current is modulated by the external injection of a short electron bunch at the centre of the proton beam. The resulting sharp edge in the effective beam current in the trailing part of the proton bunch is driving large wakefields that can lead to a growth of the seeded self-modulation (SSM). Furthermore, we discuss the feasibility for applications in AWAKE Run 2.In plasma wakefield accelerators (e.g. AWAKE) the proton bunch self-modulation is seeded by the ionization front of a high-power laser pulse ionizing a vapour and by the resulting steep edge of the driving bunch profile inside the created plasma. In this paper, we present calculations in 2D linear theory for a concept of a different self-modulation seeding mechanism based on electron injection. The whole proton bunch propagates through a preformed plasma and the effective beam current is modulated by the external injection of a short electron bunch at the centre of the proton beam. The resulting sharp edge in the effective beam current in the trailing part of the proton bunch is driving large wakefields that can lead to a growth of the seeded self-modulation (SSM). Furthermore, we discuss the feasibility for applications in AWAKE Run 2.arXiv:1802.04080oai:cds.cern.ch:23084082018-02-12
spellingShingle physics.acc-ph
Accelerators and Storage Rings
physics.plasm-ph
Other Fields of Physics
Hüther, Mathias
Muggli, Patric
Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
title Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
title_full Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
title_fullStr Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
title_full_unstemmed Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
title_short Seeding of the Self-Modulation in a Long Proton Bunch by Charge Cancellation with a Short Electron Bunch
title_sort seeding of the self-modulation in a long proton bunch by charge cancellation with a short electron bunch
topic physics.acc-ph
Accelerators and Storage Rings
physics.plasm-ph
Other Fields of Physics
url https://dx.doi.org/10.1016/j.nima.2018.02.084
http://cds.cern.ch/record/2308408
work_keys_str_mv AT huthermathias seedingoftheselfmodulationinalongprotonbunchbychargecancellationwithashortelectronbunch
AT mugglipatric seedingoftheselfmodulationinalongprotonbunchbychargecancellationwithashortelectronbunch