Author/Authors :
Adamov?، نويسنده , , D. and Agakichiev، نويسنده , , G. and Anto?czyk، نويسنده , , D. and Appelsh?user، نويسنده , , H. and Belaga، نويسنده , , V. and Biel??kov?، نويسنده , , J. and Braun-Munzinger، نويسنده , , P. and Campagnolo، نويسنده , , R. and Cherlin، نويسنده , , A. and Damjanovi?، نويسنده , , S. and Dietel، نويسنده , , T. and Dietrich، نويسنده , , L. R. Drees، نويسنده , , A. and Dubitzky، نويسنده , , W. and Esumi، نويسنده ,
Abstract :
The design, calibration, and performance of the first radial drift Time Projection Chamber (TPC) are presented. The TPC was built and installed at the CERES/NA45 experiment at the CERN SPS in the late nineties, with the objective to improve the momentum resolution of the spectrometer. The upgraded experiment took data twice, in 1999 and in 2000. After a detailed study of residual distortions a spatial resolution of 340 μ m in the azimuthal and 640 μ m in the radial direction was achieved, corresponding to a momentum resolution of Δ p / p = ( 1 % · p / GeV ) 2 + ( 2 % ) 2 .
Keywords :
Readout electronics , Pad response , Cooling System , Gas composition , ALIGNMENT , Field calculation , Drift velocity , Calibration , Pattern recognition , Tracking , Field cage , Pad plane , Gating grid , Radial drift TPC
