Nonlinear Response of Orbit Monitors

The LEP Spectrometer is used to determine beam energy by measuring the bending angle of the beam in a dipole magnet, using six beam position monitors (BPMs), which must have an accuracy close to 10-6 m. The BPMs feature an Al block with an elliptical aperture and four capacitive pickup electrodes; t...

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Detalles Bibliográficos
Autores principales: Assmann, R W, Dehning, Bernd, Matheson, J, Prochnow, J
Lenguaje:eng
Publicado: 2000
Materias:
Accelerators and Storage Rings
Acceso en línea:http://cds.cern.ch/record/447858
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author Assmann, R W
Dehning, Bernd
Matheson, J
Prochnow, J
author_facet Assmann, R W
Dehning, Bernd
Matheson, J
Prochnow, J
author_sort Assmann, R W
collection CERN
description The LEP Spectrometer is used to determine beam energy by measuring the bending angle of the beam in a dipole magnet, using six beam position monitors (BPMs), which must have an accuracy close to 10-6 m. The BPMs feature an Al block with an elliptical aperture and four capacitive pickup electrodes; their response depends on the pickup geometry, the aperture shape and the size of the beam. The beam size varies from BPM to BPM, which may give shifts of the measured position. We have investigated the implications of such shifts on the Spectrometer performance. We summarise our current understanding of the BPM behaviour using both a computer model of their response and measurements.
id cern-447858
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2000
record_format invenio
spelling cern-4478582023-05-05T13:07:52Zhttp://cds.cern.ch/record/447858engAssmann, R WDehning, BerndMatheson, JProchnow, JNonlinear Response of Orbit MonitorsAccelerators and Storage RingsThe LEP Spectrometer is used to determine beam energy by measuring the bending angle of the beam in a dipole magnet, using six beam position monitors (BPMs), which must have an accuracy close to 10-6 m. The BPMs feature an Al block with an elliptical aperture and four capacitive pickup electrodes; their response depends on the pickup geometry, the aperture shape and the size of the beam. The beam size varies from BPM to BPM, which may give shifts of the measured position. We have investigated the implications of such shifts on the Spectrometer performance. We summarise our current understanding of the BPM behaviour using both a computer model of their response and measurements.CERN-SL-2000-030-BIoai:cds.cern.ch:4478582000-07-18
spellingShingle Accelerators and Storage Rings
Assmann, R W
Dehning, Bernd
Matheson, J
Prochnow, J
Nonlinear Response of Orbit Monitors
title Nonlinear Response of Orbit Monitors
title_full Nonlinear Response of Orbit Monitors
title_fullStr Nonlinear Response of Orbit Monitors
title_full_unstemmed Nonlinear Response of Orbit Monitors
title_short Nonlinear Response of Orbit Monitors
title_sort nonlinear response of orbit monitors
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/447858
work_keys_str_mv AT assmannrw nonlinearresponseoforbitmonitors
AT dehningbernd nonlinearresponseoforbitmonitors
AT mathesonj nonlinearresponseoforbitmonitors
AT prochnowj nonlinearresponseoforbitmonitors

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