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Performance of parabolic and diffusive OTR screens at the CLIC Test Facility 3

Authors :
Olvegård, Maja
Bolzon, Benoit
Bravin, Enrico
Burger, Stephane
Dabrowski, Anne E.
Lefèvre, Thibaut
Welsch, Carsten, P.
Olvegård, Maja
Bolzon, Benoit
Bravin, Enrico
Burger, Stephane
Dabrowski, Anne E.
Lefèvre, Thibaut
Welsch, Carsten, P.
Publication Year :
2011

Abstract

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 positionon 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 asmall 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.

Details

Database :
OAIster
Notes :
English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1234064205
Document Type :
Electronic Resource