Performance of the AFS-vertex detector at the CERN ISR

D. Cockerill, C. W. Fabjan, P. Frandsen, A. Haugren, B. Heck, H. J. Hilke, R. Hogue, P. Jeffreys, H. B. Jensen, T. Killian, M. Kreisler, J. Lindsay, T. Ludlam, D. Lissauer, W. Molzon, B. S. Nielsen, Y. Oren, P. Quéru, L. Rosselet, E. RossoA. Rudge, M. Sciré, D. W. Wang, Ch J. Wang, W. J. Willis, O. Botner, H. Bøggild, E. Dahl-Jensen, I. Dahl-Jensen, Ph Dam, G. Damgaard, K. H. Hansen, J. Hooper, R. Møller, S. Nielsen, B. Schistad, T. Akesson, S. Almehed, G. von Dardel, S. Henning, G. Jarlskog, B. Lörstad, A. Melin, U. Mjörnmark, A. Nilsson, M. G. Albrow, N. A. McCubbin, W. M. Evans

Research output: Contribution to journalArticlepeer-review


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° sectors) with up to 42 space points per track, using measurements of drift time and charge division. Particle identification in the non-relativistic region is obtained by (dE/dx) sampling. The detector is operated in an inhomogeneous magnetic field at event rates of typically >5 X 10s collisions per second. Preliminary results will be presented on the detector performance achieved after the first months of operation at the ISR.

Original languageEnglish
Pages (from-to)649-654
Number of pages6
JournalPhysica Scripta
Issue number4
StatePublished - 1 Apr 1981
Externally publishedYes


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