Author/Authors :
Beck، نويسنده , , G.A. and Cormack، نويسنده , , C. and Dainton، نويسنده , , J.B. and Ebert، نويسنده , , T.R. and Gabathuler، نويسنده , , E. and Gillespie، نويسنده , , A. Shinohara and D. P. Goodall، نويسنده , , A. and Greenshaw، نويسنده , , T.J. and Martin، نويسنده , , R. J. McMahon، نويسنده , , S.J. and Maxfield، نويسنده , , S.J. and Milstead، نويسنده , , D. and Morton، نويسنده , , J.M. and Patel، نويسنده , , G.D. and Womersley، نويسنده , , L.A. and Sankey، نويسنده , , D.P.C. and Dreis، نويسنده , , H.-B. and Grنssler، نويسنده , , H. and Masson، نويسنده , , S. and Pilgram، نويسنده , , W. and Riepenhausen، نويسنده , , F. and Struczinski، نويسنده , , W.، نويسنده ,
Abstract :
The status of the operation and performance of the H1 Forward Track Detector at the HERA ep storage rings for the detection of electrons (e−) and positrons (e+) is reported. Events with charged particles produced at small angles (7° < θ <25°) relative to the incident proton beam are reconstructed using radial wire and planar wire drift chambers with an accuracy of σ(p)p2=0.027 GeV−1 for momenta p>3 GeV. Transition radiation X-rays, produced in polypropylene foil radiators immediately upstream of each radial wire drift chamber, are detected in the latter as ionisation charge additional to the usual dEdx contribution. Progress towards achieving the design eπ discrimination of better than 10% π contamination for 90% e± acceptance, which has been established with single tracks, in the complex multi-track environment of ep events at HERA, is reported.
