Author :
Atwood, W.R. ; Barczewski, T. ; Bauerdick, L.A.T. ; Bellantoni, L. ; Blucher, E. ; Blum, W. ; Boudreau, J. ; Boyle, O. ; Cinabro, D. ; Conway, J. ; Cowan, G. ; Cowen, D.F. ; Efthymiopoulos, I. ; Faure, D. ; Feng, Z. ; Fidecaro, F. ; Gobbo, B. ; Halley, A.
Abstract :
The tracking performance of the ALEPH time projection chamber (TPC) has been studied using the data taken during the LEP (Large Electron-Positron Collider) running periods in 1989 and 1990. After careful correction of residual distortions and optimization of coordinate reconstruction algorithms, a single coordinate resolution of 173 μm in the azimuthal and 740 μm in the longitudinal direction is achieved. This results in a momentum resolution for the TPC alone of Δp/p2=0.0012 (GeV/c)-1. In combination with the ALEPH inner tracking chamber (ITC), a total momentum resolution of Δp/p2=0.0008 (GeV/c)-1, close to the design specifications, is reached
Keywords :
position sensitive particle detectors; proportional counters; 173 micron; 740 micron; ALEPH time projection chamber; azimuthal; coordinate resolution; longitudinal; momentum resolution; tracking performance; Cathodes; Coordinate measuring machines; Councils; Data engineering; Electrons; Ionization; Laboratories; Power engineering and energy; US Department of Energy; Wire;
