Author/Authors :
Lehnert، نويسنده , , J. and Becker، نويسنده , , R. and Frِhlich، نويسنده , , I. and Krieg، نويسنده , , B. and Kühn، نويسنده , , W. and Lichtblau، نويسنده , , Deborah C. and Lins، نويسنده , , E. and Petri، نويسنده , , M. and Pleier، نويسنده , , M.-A. and Ritman، نويسنده , , J. and Salz، نويسنده , , C. and Traxler، نويسنده , , M.، نويسنده ,
Abstract :
The online ring recognition processor of the HADES second level trigger is described. It performs a search for Cherenkov rings of fixed diameter using the hit pattern information from the RICH detector. A complete pad plane is processed in less than 10 μs with a ring finding efficiency greater than 90%. In combination with the information from the other detector subsystems, an event reduction factor of about 100 is obtained by the second level trigger.
Keywords :
Electron detection , HADES , RICH detector , Second-level trigger
