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LED Based Light Monitoring System for the PrimEx Experiment at Jefferson Lab *)

LED Based Light Monitoring System for the PrimEx Experiment at Jefferson Lab *). Samuel Danagoulian North Carolina A&T State University, Jefferson Laboratory. Outline.

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LED Based Light Monitoring System for the PrimEx Experiment at Jefferson Lab *)

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  1. LED Based Light Monitoring System for the PrimEx Experiment at Jefferson Lab*) Samuel DanagoulianNorth Carolina A&T State University,Jefferson Laboratory CALOR02 (March 25-29, 2002)

  2. Outline PrimEx, “A Precision Measurement of the Neutral Pion Lifetime via the Primakoff Effect”Physics Motivation Experimental Setup HYbrid CALorimeter (HYCAL) Gain Monitoring SystemTrigger Data Acquisition System Prototype Light Monitoring System Stability Test. Preliminary Results Conclusion CALOR02 (March 25-29, 2002)

  3. PrimExPhysics Motivation CALOR02 (March 25-29, 2002)

  4. Primakoff Effect CALOR02 (March 25-29, 2002)

  5. Experimental Setup CALOR02 (March 25-29, 2002)

  6. HYCAL CALOR02 (March 25-29, 2002)

  7. LED: NICHIA NSPB500S PIN+Amp Trigger out PIN out (40ns) Pulse Generator (8 ns) LED light Source Am241 Thermo Isolated Box Last Dinode Anode (40 ns) PMT To HYCAL 1800 channels Trigger out t GG PMT out: Dinode LU Random Generator C A M A C PIN out PMT out: Anode LabView HYCAL GainMonitoringSystem:Trigger CALOR02 (March 25-29, 2002)

  8. DAQ CALOR02 (March 25-29, 2002)

  9. Prototype CALOR02 (March 25-29, 2002)

  10. Stability Test. Preliminary Results. CALOR02 (March 25-29, 2002)

  11. Preliminary Results CALOR02 (March 25-29, 2002)

  12. Conclusion • A prototype Light Monitoring system for HYCAL has been developed based on blue super bright LED. It provides 150 channels of the prototype calorimeter • The stability of the level of 0.2% has been achieved. • The final system will be constructed by the end of 2002. It will consist of two separate subsystems, one for PbOW4 and another for Pb-glass. CALOR02 (March 25-29, 2002)

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