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.