Preliminary HPMT Testing and SciFi Analysis Report by Zisis Papandreou and Regina
This report covers the initial tests and analysis of the High-Performance Multi-Type (HPMT) detectors and SciFi (Scintillating Fiber) geometry conducted on November 1, 2001. Key findings include the resolution of some discharging problems and partial solutions for pre-amp selection. Signals were successfully observed from a radioactivity source using NaI detectors. Communication with DEP has been established, and testing procedures are in progress to refine the electronic circuits and detector design. The report also highlights the completion of the first round of cosmic ray and TRIUMF tests with promising results.
Preliminary HPMT Testing and SciFi Analysis Report by Zisis Papandreou and Regina
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Presentation Transcript
BCAL Status Report HPMT operation Readout geometry SciFi tests & analysis Prototype construction Zisis Papandreou, Regina November 1st, 2001
Preliminary HPMT tests • DEP PP0350G • Discharging problem: partly solved • Pre-amp selection: partly solved • Signals observed from radioactivity source using a NaI detector • Direct communication with DEP established • Personnel: • Electronics engineer, technician, postdoc (Vitaly Kovaltchouk)
HPMT Testing Chores • Need to perfect the electronic circuit • Fast charge pre-amp • Suitable pulse shaper • HV-rated cables • Communicate with DEP • Modify the detector design • Transfer knowledge • Bench tests • Operate with Flasher • Operate with Cosmic Rays
HPMT Geometry (10 PMTs)? Tough-cookie design! Solution: DEP redesigns the electronics housing 10 HPMTs per side = 1000 PMTs ($2.5M)
Readout & Geometry Issues • Optimize area reduction (4:1) • Light guides and Winston Cones • HPMTs must be staggered for clearance • No. of HPMTs must be settled • GUIDEIT MC simulations required • Fiber-to-fiber coupling & standard PMTs • VLPCs • Good neighbor policy: • Solenoid • Drift chambers
SciFi Tests • First round of cosmic ray and TRIUMF tests completed;good results • Analysis: • Extract index of refraction • Improve timing resolution in software • Look at particle ID • Compare results with cosmic ray tests • Order Kuraray multi-clad fibers and test • Repeat cosmic-ray measurements • Begin prototype construction
