Author/Authors :
Fabjan، نويسنده , , C.W. and Franz، نويسنده , , A. and Piuz، نويسنده , , F. and Santiard، نويسنده , , J.C. and Spegel، نويسنده , , M. and Williams، نويسنده , , T.D. and Cherney، نويسنده , , M. and Esumi، نويسنده , , S. and Sugitate، نويسنده , , T. and Schmidt-Sorensen، نويسنده , , J. and Kubica، نويسنده , , B. and LeGuay، نويسنده , , M. and Paic، نويسنده , , G.، نويسنده ,
Abstract :
The Threshold Imaging Cherenkov (TIC) was built as part of an upgrade programme for the NA44 spectrometer in view of 160 GeV·A lead-ion beams from the CERN SPS. The detector is used to distinguish pion tracks from those of heavier particles (K, p, d) in the momentum range of 4–8 GeV/c. Cherenkov photons produced by pions in a 1 m long isobutane radiator are converted to electrons in TMAE at 25°C and detected in a MWPC with 2-dimensional cathode pad readout. A threshold is set on the number of pads hit within a fiducial zone on the cathode plane around a projected external track.
