Cargando…

Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3

At the CLIC Test Facility 3, OTR screens are commonly used in beam imaging systems for energy and energy spread characterization in dedicated spectrometer lines. In these lines the horizontal beam size is typically of the order of one centimeter. Already in 2005 a limitation was observed resulting f...

Descripción completa

Detalles Bibliográficos
Autores principales: Olvegaard, M, Bolzon, B, Bravin, E, Burger, S, Dabrowski, A, Lefevre, T, Welsch, C P
Lenguaje:eng
Publicado: 2011
Materias:
Acceso en línea:http://cds.cern.ch/record/1372187
_version_ 1780922901715746816
author Olvegaard, M
Bolzon, B
Bravin, E
Burger, S
Dabrowski, A
Lefevre, T
Welsch, C P
author_facet Olvegaard, M
Bolzon, B
Bravin, E
Burger, S
Dabrowski, A
Lefevre, T
Welsch, C P
author_sort Olvegaard, M
collection CERN
description At the CLIC Test Facility 3, OTR screens are commonly used in beam imaging systems for energy and energy spread characterization in dedicated spectrometer lines. In these lines the horizontal beam size is typically of the order of one centimeter. Already in 2005 a limitation was observed resulting from a strong dependence of the intensity of the light captured by the camera, on the position on the screen (vignetting). The severity of this effect increases with the electron energy, as the aperture of the optical system is finite and the OTR photons are emitted in a small cone of 1/γ angle. To mitigate this effect, different shapes and surface polishing of the screens were investigated. Parabolic and diffusive OTR radiators were tested in several spectrometer lines all along the CTF3 complex. The results are presented in this paper.
id cern-1372187
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13721872022-08-17T13:30:25Zhttp://cds.cern.ch/record/1372187engOlvegaard, MBolzon, BBravin, EBurger, SDabrowski, ALefevre, TWelsch, C PPerformance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3Accelerators and Storage RingsAt the CLIC Test Facility 3, OTR screens are commonly used in beam imaging systems for energy and energy spread characterization in dedicated spectrometer lines. In these lines the horizontal beam size is typically of the order of one centimeter. Already in 2005 a limitation was observed resulting from a strong dependence of the intensity of the light captured by the camera, on the position on the screen (vignetting). The severity of this effect increases with the electron energy, as the aperture of the optical system is finite and the OTR photons are emitted in a small cone of 1/γ angle. To mitigate this effect, different shapes and surface polishing of the screens were investigated. Parabolic and diffusive OTR radiators were tested in several spectrometer lines all along the CTF3 complex. The results are presented in this paper.CERN-BE-2011-012oai:cds.cern.ch:13721872011-05-01
spellingShingle Accelerators and Storage Rings
Olvegaard, M
Bolzon, B
Bravin, E
Burger, S
Dabrowski, A
Lefevre, T
Welsch, C P
Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3
title Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3
title_full Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3
title_fullStr Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3
title_full_unstemmed Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3
title_short Performance of Parabolic and Diffusive OTR Screens at the CLIC Test Facility 3
title_sort performance of parabolic and diffusive otr screens at the clic test facility 3
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/1372187
work_keys_str_mv AT olvegaardm performanceofparabolicanddiffusiveotrscreensattheclictestfacility3
AT bolzonb performanceofparabolicanddiffusiveotrscreensattheclictestfacility3
AT bravine performanceofparabolicanddiffusiveotrscreensattheclictestfacility3
AT burgers performanceofparabolicanddiffusiveotrscreensattheclictestfacility3
AT dabrowskia performanceofparabolicanddiffusiveotrscreensattheclictestfacility3
AT lefevret performanceofparabolicanddiffusiveotrscreensattheclictestfacility3
AT welschcp performanceofparabolicanddiffusiveotrscreensattheclictestfacility3