Xtal Calorimeter with Fiber Readout work by diploma student Ralph Dollan (HU) Achim Stahl DESY Zeuthen 10.Oct.2003 LumiCal BeamCal
Xtal Calorimeter with Fiber Readout
Jan 01, 2016
Xtal Calorimeter with Fiber Readout. work by diploma student Ralph Dollan (HU). LumiCal. BeamCal. Achim Stahl DESY Zeuthen 10.Oct.2003. Detector Concept. segments of heavy crystals. individual fiber readout for every crystal segment. Expectations: - PowerPoint PPT Presentation
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Xtal Calorimeter with Fiber Readout
work by diploma student
Ralph Dollan (HU)
Achim Stahl DESY Zeuthen 10.Oct.2003
LumiCal
BeamCal
Detector Concept
segments of heavy crystals
individual fiber readoutfor every crystal segment
Expectations:• excellent energy resolution• excellent timing• reasonable segmentation• small Molière radius (?)
Test Setup
Cosmic Telescope
Alternative: Ru-Source
Calibration of PMTs
PMT
LED
Lightyield
Measure Lightyield with plastic scintillatorCompare fiber readout vs. direct readout
Lightyield
fiber readout
directreadout ~ 25 %
Cross Talk
How much light do fibers see from other crystals
fiber painted with black paint
Cross Talk
cosmics
?
but ….
Outlook
complete cross talk studies
test fiber readout for Čerenkov radiator
investigate heavy crystals
try APD readout
build larger array
but..… Ralph will finish end of this yearno further man-power available
PMT - Calibration
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