3/19/2003 T0 Amplitudes.

The following pictures have been taken after run 11600 have ended. All T0 signals have been measured at the patch panel (2 lower rows of the Fastbus rack). ADC gate is taken from CAT module.

Fig. 303191049. T0P9. Scope trigger: ADC Gate. Trigger configuration: SPEC.TOF.

Fig. 303191042. T0N9. Scope trigger: ADC Gate. Trigger configuration: SPEC.TOF.

Fig. 303191020. T0P9. Scope trigger: T0P9. Trigger configuration: dAPeripheral.

Fig. 303191011. T0P9. Scope trigger: T0P9. Trigger configuration: dAPeripheral.

Summary:

  1. T0P signals have average amplitudes of 150 mV. This level should correspond to ‘MIP’ particle
  2. T0N signals are 3-5 times higher than T0Ps. The possible explanation:  T0N have average multiplicity ~ 3-5 hits per event
  3. There are T0P signals with very high amplitudes ranging from 1 to 15 V
  4. The signal reflection plays very negative role in the ADC specta.