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Beam Shape and Halo Monitor Study
The Beam Shape and Halo Monitor, designed by Masaki Hori, is the main diagnostic tool for the 3 MeV test stand scheduled in 2008. This detector will be able to measure the transverse halo generated in the RFQ and the Chopper-line and to detect and measure the longitudinal halo composed of the incomp...
Autores principales: | , , |
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Lenguaje: | eng |
Publicado: |
2007
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/1001235 |
_version_ | 1780911588200415232 |
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author | Lallement, J B Sargsyan, E Z Hori, M |
author_facet | Lallement, J B Sargsyan, E Z Hori, M |
author_sort | Lallement, J B |
collection | CERN |
description | The Beam Shape and Halo Monitor, designed by Masaki Hori, is the main diagnostic tool for the 3 MeV test stand scheduled in 2008. This detector will be able to measure the transverse halo generated in the RFQ and the Chopper-line and to detect and measure the longitudinal halo composed of the incompletely chopped bunches. Its principle of functioning is the following: H- ions hit a carbon foil and generate secondary electrons with the same spatial distribution than the incoming beam and a current depending on an emission coefficient given by the carbon foil. These electrons are accelerated towards a phosphor screen by an electric field applied between accelerating grids. Once the electrons reach the phosphor screen, they generate light which is transmitted to a CCD camera via optic fibers [1]. It is expected to give a time resolution of 1-2ns and a spatial resolution of 1mm. The first test of the BSHM done with a Laser has shown a spatial resolution bigger than 1cm and the time resolution bigger than 2ns[2]. The purpose of this study is to understand what are the processes which deteriorate the resolution and to show the benefits brought by adding a pre-accelerating grid in the detector. |
id | cern-1001235 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2007 |
record_format | invenio |
spelling | cern-10012352019-09-30T06:29:59Zhttp://cds.cern.ch/record/1001235engLallement, J BSargsyan, E ZHori, MBeam Shape and Halo Monitor StudyAccelerators and Storage RingsThe Beam Shape and Halo Monitor, designed by Masaki Hori, is the main diagnostic tool for the 3 MeV test stand scheduled in 2008. This detector will be able to measure the transverse halo generated in the RFQ and the Chopper-line and to detect and measure the longitudinal halo composed of the incompletely chopped bunches. Its principle of functioning is the following: H- ions hit a carbon foil and generate secondary electrons with the same spatial distribution than the incoming beam and a current depending on an emission coefficient given by the carbon foil. These electrons are accelerated towards a phosphor screen by an electric field applied between accelerating grids. Once the electrons reach the phosphor screen, they generate light which is transmitted to a CCD camera via optic fibers [1]. It is expected to give a time resolution of 1-2ns and a spatial resolution of 1mm. The first test of the BSHM done with a Laser has shown a spatial resolution bigger than 1cm and the time resolution bigger than 2ns[2]. The purpose of this study is to understand what are the processes which deteriorate the resolution and to show the benefits brought by adding a pre-accelerating grid in the detector.AB-Note-2006-047CERN-AB-Note-2006-047oai:cds.cern.ch:10012352007-01-17 |
spellingShingle | Accelerators and Storage Rings Lallement, J B Sargsyan, E Z Hori, M Beam Shape and Halo Monitor Study |
title | Beam Shape and Halo Monitor Study |
title_full | Beam Shape and Halo Monitor Study |
title_fullStr | Beam Shape and Halo Monitor Study |
title_full_unstemmed | Beam Shape and Halo Monitor Study |
title_short | Beam Shape and Halo Monitor Study |
title_sort | beam shape and halo monitor study |
topic | Accelerators and Storage Rings |
url | http://cds.cern.ch/record/1001235 |
work_keys_str_mv | AT lallementjb beamshapeandhalomonitorstudy AT sargsyanez beamshapeandhalomonitorstudy AT horim beamshapeandhalomonitorstudy |