ecal fee and daq yury gilitsky ihep. phenix emcal performance
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ECAL FEE and DAQ
Yury Gilitsky IHEP
PHENIX EMCAL PERFORMANCE
PHENIX EMCAL FEE
FEU 115M resistive divider
Analog part of FEE
Dynamic range 20MeV up to 30 GeV for Low
Gain and 5MeV for small signals with 12-bit ADC.
HERA-B ECAL FEE
HERA-B ECAL FEE
Chip : AMS BiCMOS 0.8um4 channels per chip
PM
50
5ns - 50
25ns - 100 100
ADC100
+-
Cf = 4pF
Rf = 12 M
100nF
22nF
Analog chip
Buffer Integrator
LHCB ECAL/HCAL FEE
LHCB ECAL/HCAL analog part
LHCB ECAL analog signals
Average pulse shapes from 50 GeV electrons and from LED after clipping
Pulse shapes from 50 GeV electron and from LED
Figure 11: The ADC spectra from 50 GeV electrons (top) and LED pulse (bottom)
The ADC spectra from 50 GeV electrons (top) and LED pulse (bottom)
I2C
or
SP
I D
AC
CW
1 or
DC
-DC
1
Vol
tage
reg
-s(+
/-)
CW
2 or
DC
-DC
2
AM
PLI
FIE
R
AP
D
KOPIO ECAL FEE
0 100 200 300 400
0
400
800
1200
QDC, channel
cpb
Pedectal
longitudinal transversal
Your text
long/trans=5.4
GAIN APD =171 Cd=350pF(16mm diam-r 130pF)ENC=11643e- (ENC=600e-+Cd*10e-/pF=4100e-)S/N=50 ENE=1.1MeV
TESLA CALORIMETER HAMAMATSU APD 3X3mm readout
CONCLUSIONS
Photomultiplier and APD comparison showspractically the same performance as calorimeterphoto detector. But for high rate and time precisionapplications photomultiplier is more preferable choice.
Optimization of the calorimeter readout chain is needed for CBM experimental conditions
Design of the high voltage overall system aregood known from other experiments independently from photo detector type.
Signal chain optimization is strongly dependingfrom the photo detector.