performance of new strip scintillator
DESCRIPTION
Performance of new strip scintillator. Minseok Park . Jungeun Lee, Jaeyun Choi , Kyungpook National University . Contents. Ⅰ. Introduction Ⅱ. Experimental Setup Ⅲ. Result of Measurement Ⅳ. Conclusion. Configurations. The strip used to FNAL prototype - PowerPoint PPT PresentationTRANSCRIPT
Performance of new strip scintillator
Jungeun Lee, Jaeyun Choi, Kyungpook National University
Minseok Park
Ⅰ. Introduction
Ⅱ. Experimental Setup
Ⅲ. Result of Measurement
Ⅳ. Conclusion
Contents
Recently produced strips : width all 5mm
Configurations
Strip 4 used to DESY prototype45mm X 10mm X 3mm (fiber)[White paint cover]
The strip used to FNAL prototype 45mm X 10mm X 3mm (fiber, silver film cover)
Strip 1. (fiber)45mm X 5mm X 3mm
Strip 2. (direct readout) 45mm X 5mm X 3mm
Strip 3. (direct readout)45mm X 5mm X 2mm
5 Types of scintillators
FNAL versionStrip
Strip 1 Strip 2 Strip 3 DESY versionStrip
10mm
5mm
Ⅱ. Experimental setupThermostat chamber
Scanning stageTriggerPMT
Readoutcircuit
Signal
Triggerlogic
VME ADC
Sig IN
Gate IN
Voltage source
Biasvoltage
PC
Scannercontroller
MPPC Beta
rayCollimated b - ray
Automated2-D scanning system
MPPC
Beta-ray Source(137Cs)
Experimental Setup(trigger)
Trigger scintilla-tor
Target scintilla-tor MPPC
Trigger logic process
and
AMP
Target scintilla-tor
Trigger scintilla-tor
MPPC
Scintillator testing with Motor Control System
Analysis procedure
• For the data collected at each point Take ADC distribution with beta-ray signal Cut the pedestal part, take average of signal region The average shows strip response at this point Repeat same thing for all the point
Cut here !
Take aver-age of This region
ped
signal
1-d projection part is just this part.
1) FNAL version vs DESY versionⅢ. Result of Measurement
DESY ver-sionStrip 4
FNAL ver-sionStrip
Silver film white paint
The Comparison of the covering materials
while other conditions are same
FNAL versionwith Silver cover
DESY version with white paint
Standard resultAs reference
Light yield is slightly lower but uniformity Is better.
990-860~130
760-740~20
1) FNAL version vs DESY version
2) FNAL version vs 5mm Width strip
Strip15mm (fiber)
FNAL ver-sionStrip 10mm
10mm
5mm
The Comparison of the width
while other conditions are same
2) FNAL version vs 5mm Width strip
FNAL version width 10mm
Standard resultAs reference
Strip 1 width 5mm
Light yield is muchlower but uniformity Is better.
990-860~130
500-480~20
3) With silver cover vs Without cover(5mm)
The Comparison of the Existence of silver cover
while other conditions are same
3) With silver cover vs Without silver cover(5mm)
Strip 1With
silver cover
Strip1Without
silver cover
The strip1 with silver cover gets higher Light yield. And uniformity is same.
500-480~20
350-330~20
4) With fiber vs Direct readout (5mm)
Strip2(Direct readout)
Strip1(fiber)
Comparison of the existence of fiberCompare strip with fiber and direct readout while other conditions are same
Strip 1With fiber
Strip 2 Direct read-
out
4) With fiber vs Direct readout(5mm)
The strip1 with fiber gets lower Light yield than strip2But uniformity is better.
500-470~30
930-870~60
5) Thickness : 3mm vs 2mm(Direct readout)
Strip3Thickness: 2mm
Strip2Thickness: 3mm
Comparison of the Thickness of stripwhile other conditions are same
5) Thickness : 3mm vs 2mm(Direct readout)
Strip 3 Thickness 2mm
Strip 2 Thickness
3mm
The strip3(2mm) gets little higher Light yield than strip2(3mm).But uniformity is worse.
930-880~50
950-830~120
Ⅳ. Conclusion FNAL version(silver cover) vs DESY version(white paint)
Light yield : FNAL version > DESY version Uniformity : FNAL version < DESY version
FNAL version(10mm width) vs Strip1 (5mm width)
Light yield : FNAL version > 5mm Width strip Uniformity : FNAL version < 5mm Width strip
5mm width strip is not good for getting higher light signalBut, Its uniformity is better than FNAL version.
Ⅳ. Conclusion
• With silver cover vs Without silver cover (5mm)
Light yield : With silver cover > Without silver cover Uniformity : With silver cover ~ Without silver cover
• With fiber vs Direct readout (5mm)
Light yield : With fiber < Direct readout Uniformity : With fiber > Direct readout
• Thickness : 3mm vs 2mm(Direct readout)
Light yield : Thickness : 3mm < Thickness : 2mm Uniformity : Thickness : 3mm < Thickness : 2mm
Plan Polishing the strip Silver painting Checking the strip clearly by using the micro-
scope Improving the manufacturing system
* Long term plan Making more stable system Developing optical simulation
Reflector
Photosensor