Level-3 trigger decisions are based on real-time processing of the data produced by each detector, separately. For the SVT, this corresponds to track reconstruction.
There are, as yet, no detailed SVT level-3 track reconstruction algorithm performance requirements. There is, however, a known time budget for this process. The TPC/SVT receiver boards will provide sufficient buffering for up to seven events. Therefore, given the maximum SVT event rate of 100 events/sec, any average event processing that exceeds 70 msec will result in increased DAQ system dead time. Although this does not yield a requirement for the processing power needed for level-3 algorithm processing, it does provide a time budget within which system performance will not be degraded.
Overall performance of this stage of the event selection process is critical in achieving the 100 to 1 rejection required to achieve trigger performance requirements.