1. ECAL FEE and DAQ Yury Gilitsky IHEP

2. PHENIX EMCAL PERFORMANCE

3. 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.

4. HERA-B ECAL FEE

6. Chip : AMS BiCMOS 0.8um 4 channels per chip PM 50  5ns - 50  25ns - 100  100  ADC 100  + - Cf = 4pF Rf = 12 M  100n F 22nF Analog chip BufferIntegrator LHCB ECAL/HCAL FEE

7. LHCB ECAL/HCAL analog part

8. 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

9. The ADC spectra from 50 GeV electrons (top) and LED pulse (bottom)

10. I2C or SPI DAC CW1 or DC-DC1 Voltage reg-s(+/-) CW2 or DC-DC2 AMPLIFIER APD KOPIO ECAL FEE

14. GAIN APD =171 Cd=350pF(16mm diam-r 130pF) ENC=11643e- (ENC=600e-+Cd*10e-/pF=4100e-) S/N=50 ENE=1.1MeV

15. TESLA CALORIMETER HAMAMATSU APD 3X3mm readout

16. CONCLUSIONS Photomultiplier and APD comparison shows practically the same performance as calorimeter photo detector. But for high rate and time precision applications photomultiplier is more preferable choice. Optimization of the calorimeter readout chain is needed for CBM experimental conditions Design of the high voltage overall system are good known from other experiments independently from photo detector type. Signal chain optimization is strongly depending from the photo detector.