1. Slide 1 UCSB CDMS Group Neutron Trigger

2. Slide 2 UCSB CDMS Group Neutron Trigger PROGRESS: à Electronics Fabrication Complete for SN1 à Simulation Work Continues à Waiting for in-system testing à New Trigger Enable Input added

3. Slide 3 UCSB CDMS Group Neutron Trigger SN1 Final NIM Prototype Module Package USB Control NIM Trigger In Global Trigger Out Test Trigger In Status Lamps à Trigger à Live Trigger Enable (in rear)

4. Slide 4 UCSB CDMS Group Hardware Trigger Enable DAQ Dead Time reduction à LabView vi @ 16hz à A/D is 30hz alone New DAQ A/D End of Conversion as input à Low,High to Low à CMOS à Must drop low to allow next global trigger

5. Slide 5 UCSB CDMS Group LabView VI Panel

6. Slide 6 UCSB CDMS Group Future Plans Continue Trigger Simulation à Optimize Dead Time à Uncover design flaws Complete Schematic for SN2 à PC Layout à Clean NIM Module Package Design new LED Pulser à USB Control of light level à Attempt to achieve very fast pulse

7. Slide 7 UCSB CDMS Group USB LED Pulser