Technical details

The Trigger Control System is in charge to deliver trigger signals to all the Front-end electronics. The TCS controller is built with two VME cards which receive different signals (trigger signal, begin and end of spill signals, etc...) and have an internal 38.89 MHz clock. They have also high power optical output which deliver optical signals which are dispatched over all Catches and GeSiCas. These TCS signals are deliver to the Catches using backplane cards named TCS receivers. GeSiCas have their own internal TCS receiver. Several informations can be deliver to the front-end electronics using the TCS signal: 38.88 MHz clock, physics triggers, calibration triggers, begin and end of spills, begin and and end of runs, etc...

• tcsServer is integrated with config_server (see front-end CPU informatios)
  • LOAD -A pccofe01 and pccofe02 to reload TCS controller and prescaler
• CalTrig button in runControl for the calibration triggers setting
• check_trigger informations continuously displayed in TCS status window of the Run Control
• TCSC: command line program for TCS control
  • not well documented yet, experts only
  • in principle it's all DIM: dimclient cmd TCS/main/Control 'R 0' would start a run...

An overview on geography and timing: