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...
Autores principales: | , , , , , , |
---|---|
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 |