Author/Authors :
Brinkmann، نويسنده , , D. and Buncic، نويسنده , , Jerome P. and Eberlein، نويسنده , , B. and Eschke، نويسنده , , J. and Fleischmann، نويسنده , , B. and Foka، نويسنده , , P. and Fuchs، نويسنده , , M. and Keidel، نويسنده , , R. and Kosiec، نويسنده , , J. and Kühmichel، نويسنده , , A. and Linzen، نويسنده , , A. and Pfennig، نويسنده , , J. and Piper، نويسنده , , A. and Pühlhofer، نويسنده , , F. and Rِhrich، نويسنده , , D. and Rothard، نويسنده , , H. and ، نويسنده ,
Abstract :
In the collision of relativistic heavy ions with nuclear targets at the CERN SPS up to several hundred charged particles in the momentum range of 0.1–200 GeV/c are produced. These events have been recorded on film by the NA35 streamer chamber. A computer environment for the analysis of this data was developed and became operational at the University of Frankfurt. This Frankfurt Image Processing System (FIPS) is a modular und distributed system allowing the application of image processing and image understanding techniques to digitized streamer chamber images as well as the interactive computer-assisted measurement of photographic streamer chamber pictures on traditional film projection tables.
tic track reconstruction software has been developed which in turn utilizes a multitude of image processing and image understanding techniques. The efficiency of the pattern recognition and track reconstruction processes is greater than 95% with a very good momentum resolution dP/P = ”(0.0009P)2 + (0.0018)2. So far about 20 000 of these events have been processed. Currently approximately 50 events per day are automatically analysed.
