Performance of the AFS-vertex detector at the CERN ISR

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The central detector of the Axial Field Spectrometer (AFS) is a cylindrical drift chamber using a 'bicycle-wheel' geometry. Its design has been optimized for jet-like events with high track densities. This is accomplished through a high degree of azimuthal segmentation (4 degrees sectors)...

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Detalles Bibliográficos
Autores principales: Cockerill, D J A, Fabjan, Christian Wolfgang, Frandsen, Poul Kjaer, Hallgren, A, Heck, B, Hilke, Hans Jürgen, Hogue, R W, Jeffreys, P, Jensen, H B, Killian, T, Kreisler, M N, Lindsay, J, Ludlam, Thomas W, Lissauer, D, Molzon, W R, Nielsen, B S, Oren, Y, Quéru, Paul, Rosselet, L, Rosso, E, Rudge, A, Sciré, M, Wang, D W, Wang, C J, Willis, W J, Botner, O, Bøggild, H, Dahl-Jensen, Erik, Dahl-Jensen, I, Dam, P, Damgaard, G, Hansen, K H, Hooper, J, Møller, R, Nielsen, S Ø, Schistad, B L, Åkesson, T, Almehed, S, von Dardel, Guy F, Henning, S, Jarlskog, G, Lörstad, B, Melin, A, Mjörnmark, U, Nilsson, A, Albrow, Michael G, McCubbin, N A, Evans, W M
Lenguaje:eng
Publicado: 1981
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1088/0031-8949/23/4B/007
http://cds.cern.ch/record/129780
Descripción
Sumario:The central detector of the Axial Field Spectrometer (AFS) is a cylindrical drift chamber using a 'bicycle-wheel' geometry. Its design has been optimized for jet-like events with high track densities. This is accomplished through a high degree of azimuthal segmentation (4 degrees sectors) with up to 42 space points per track, using measurements of drift time and charge division. Particle identification in the nonrelativistic region is obtained by (dE/dx) sampling. The detector is operated in an inhomogeneous magnetic field at event rates of typically >5*10/sup 5/ collisions per second. Preliminary results will be presented on the detector performance achieved after the first months of operation at the ISR. (5 refs).

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