WLS Light Collectors - UC Davis

More documents

Recommendations

Info

• 2 WS plastic prototypes • blue-green to couple directly to PMT • blue-blue to couple to WS coating on PMT (also shorter decay time) • WS plastics same base as used in scintillator plastics • Polyvinyl toluene (PVT) • slightly softer than acrylic - requires slightly slower machining • BC-499-76 (blue-blue) has short decay time (2.1 ns) • replaces BC-480 • better match to potential WS film coatings on PMT? • BC-482A (blue-green) slightly longer decay (12 ns) • better match to PMT without coating WS Plastic Vendor Type Base Index of Refraction BC-499-76 Saint-Gobain Blue - Blue PVT 1.58 2.1 ns BC-482A Saint-Gobain Blue - Green PVT 1.58 12 ns Decay Time Some specifications of test WS plastics 12
PMT Only for all plots • Testing acrylic prototype in air • nailing down technique and analysis • want to minimize activity that might stress PMT • Using 2 nd PMT to monitor LED and provide t 0 for timing studies • perform event-by-event subtraction to remove LED fluctuations • 2 DAQ settings for slow (raw) and fast (pre-histogrammed) collection Reference PMT Reference PMT ADC bin (arb units) 10” Test PMT 10” Test PMT ADC bin (arb units) Pedestals for both PMTs at operating settings Flashed LED for both PMTs at operating settings 13
Page 1 and 2: LBNE Norm Buchanan, William Johnsto
Page 3 and 4: • Explored for IMB • Square pla
Page 5 and 6: • Build and Test Prototype • Pr
Page 7 and 8: DAQ room SRS pulser 0.5 m fiber spl
Page 9 and 10: • Using a Hamamatsu HQE 10” R70
Page 11: Test fit (no Tyvek) Leveling LV pla
Page 15 and 16: BC-499-76 Tyvek+RTV Misc costs (set
Page 18 and 19: PMT PMT • Want to get light in th
Page 20 and 21: • Contamination • ultra-pure wa

WLS Light Collectors - UC Davis

Create successful ePaper yourself

Delete template?

Save as template?