of Plastic Scintillator Oct 2 2009 IPBSM Group 1 Schematic Drawing of new Gamma Detector 2 sandwich type calorimeter SUS and plastic scintillation plate wavelengthshifting fiber WLSF for light transmission ID: 259776
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Slide1
Gamma Detectorof Plastic Scintillator
Oct. 2, 2009IP-BSM Group
1Slide2
Schematic Drawing of
new Gamma Detector
2
sandwich type calorimeter
SUS and plastic scintillation plate
wavelength-shifting fiber (WLSF) for light transmission
B
eam
SUS
PMT
plastic scintillator
WLSFSlide3
Comparison withthe CsI
(Tl) Gamma Detector
same
multi-layer scintillator
BG separation by the difference between signal and BG in shower development
different
scintillator constituent: plastic
faster response time
non-deliquescent
lower energy resolutionsampling calorimeter
3Slide4
Scintillator
4
plastic
scintillator
CsI
(
Tl
)Light
Output [photon/MeV]
1.1 x 1046.5 x 104
Rise Time[ns]0.9
9.5 (66%),41 (34%)Decay
Time[ns]2.11100
Wavelength of Max. Emission[nm]
425
580
emission spectrumSlide5
WLSF
Kuraray Y110.5mm-suquare
5
absorption and emission spectrum
PMT
spectral responseSlide6
Geometry of the Calorimeter
6
number of layer: 5
SUS converter:
1-1-5-20-40mm thick
scintillator: 30mm thick (all layer)
100mm
100mm
30mm
SUS
Beam
plastic scintillatorSlide7
Geant4 Simulation:
Shower Development2009/8/10
7Slide8
Comparison with the CsI(Tl
) Gamma Detector in BG Separation
new detector
the
CsI
(
Tl) gamma detector
2009/8/10
8
Signal: 500 photon
with Shot by Shot methodSlide9
Incident Energy vs. Deposit
Energy Fraction2009/8/10
9
*
fraction
of
the
CsI
(Tl) gamma detector is “Flat”Slide10
Scintillator Box
10
0.5mm SUS plate
Aluminum frameSlide11
Scintillator Boxes
are Independent of each other
11
PMT above the beam-line
to avoid radiation damage
LED for
calibration
100mm
100mmSlide12
Connecting Jigfor connecting PMT and WLSF
12Slide13
Scintillator
13
wrap:
Goretex
Fiber: Y11 x 18 (green), calibration fiber x 1 (white)Slide14
Shower Development in SUS
Signal photon
BG photon
14
SUS converter 1-1-5-20-40mm thick
40mm
2
0mm
5
mm
1
mm
1
mmSlide15
Shower Development of Monochrome Gamma (normalized to 1)
2009/8/10
15