Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN
A laser-based emittance monitor has been developed to non-invasively measure the transverse emittance of the LINAC4 H⁻ beam at its top energy of 160MeV. After testing several sub-systems of the instrument during linac commissioning at intermediate energies, two instruments are now permanently instal...
Autores principales: | , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2018
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.18429/JACoW-IPAC2018-WEPAL074 http://cds.cern.ch/record/2650969 |
_version_ | 1780960871764197376 |
---|---|
author | Hofmann, Thomas Boorman, Gary Bosco, Alessio Gibson, Stephen Roncarolo, Federico |
author_facet | Hofmann, Thomas Boorman, Gary Bosco, Alessio Gibson, Stephen Roncarolo, Federico |
author_sort | Hofmann, Thomas |
collection | CERN |
description | A laser-based emittance monitor has been developed to non-invasively measure the transverse emittance of the LINAC4 H⁻ beam at its top energy of 160MeV. After testing several sub-systems of the instrument during linac commissioning at intermediate energies, two instruments are now permanently installed. These instruments use a pulsed laser beam delivered to the accelerator tunnel by optical fibres before final focusing onto the H⁻ beam. The photons in the laser pulse detach electrons from the H⁻ ions, which can then be deflected into an electron multiplier. In addition, the resulting neutral H⁰ atoms can be separated from the main beam by a dipole magnet before being recorded by downstream diamond strip-detectors. By scanning the laser in the horizontal and vertical plane the beam profiles are obtained from the electron signals and the emittance can be reconstructed by the H⁰ profiles at the diamond detectors. This paper describes the final system layout that consists of two independent instruments, each measuring profile and emittance of the H⁻ beam in the horizontal and vertical plane and discusses the preliminary commissioning results. |
id | oai-inspirehep.net-1690623 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2018 |
record_format | invenio |
spelling | oai-inspirehep.net-16906232019-09-30T06:29:59Zdoi:10.18429/JACoW-IPAC2018-WEPAL074http://cds.cern.ch/record/2650969engHofmann, ThomasBoorman, GaryBosco, AlessioGibson, StephenRoncarolo, FedericoCommissioning of the Operational Laser Emittance Monitors for LINAC4 at CERNAccelerators and Storage RingsA laser-based emittance monitor has been developed to non-invasively measure the transverse emittance of the LINAC4 H⁻ beam at its top energy of 160MeV. After testing several sub-systems of the instrument during linac commissioning at intermediate energies, two instruments are now permanently installed. These instruments use a pulsed laser beam delivered to the accelerator tunnel by optical fibres before final focusing onto the H⁻ beam. The photons in the laser pulse detach electrons from the H⁻ ions, which can then be deflected into an electron multiplier. In addition, the resulting neutral H⁰ atoms can be separated from the main beam by a dipole magnet before being recorded by downstream diamond strip-detectors. By scanning the laser in the horizontal and vertical plane the beam profiles are obtained from the electron signals and the emittance can be reconstructed by the H⁰ profiles at the diamond detectors. This paper describes the final system layout that consists of two independent instruments, each measuring profile and emittance of the H⁻ beam in the horizontal and vertical plane and discusses the preliminary commissioning results.CERN-ACC-2018-098oai:inspirehep.net:16906232018 |
spellingShingle | Accelerators and Storage Rings Hofmann, Thomas Boorman, Gary Bosco, Alessio Gibson, Stephen Roncarolo, Federico Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN |
title | Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN |
title_full | Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN |
title_fullStr | Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN |
title_full_unstemmed | Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN |
title_short | Commissioning of the Operational Laser Emittance Monitors for LINAC4 at CERN |
title_sort | commissioning of the operational laser emittance monitors for linac4 at cern |
topic | Accelerators and Storage Rings |
url | https://dx.doi.org/10.18429/JACoW-IPAC2018-WEPAL074 http://cds.cern.ch/record/2650969 |
work_keys_str_mv | AT hofmannthomas commissioningoftheoperationallaseremittancemonitorsforlinac4atcern AT boormangary commissioningoftheoperationallaseremittancemonitorsforlinac4atcern AT boscoalessio commissioningoftheoperationallaseremittancemonitorsforlinac4atcern AT gibsonstephen commissioningoftheoperationallaseremittancemonitorsforlinac4atcern AT roncarolofederico commissioningoftheoperationallaseremittancemonitorsforlinac4atcern |