Novel concept of ASIC readout developed for Electromagnetic Calorimeter base on Silicon pixel sensor and tungsten absorber. The performance of multi-channel and dual gain ASIC tested with injected charge and 3 GeV electron beam. Obtained results confirmed the ability of ASIC .

1. Status of ASIC readout for
Electromagnetic Calorimeter
Elmaddin Guliyev
Laboratoire Leprince-Ringuet, Ecole Polytechnique, Palaiseau, France
for the CALICE Collaboration
International Linear Collider, the experiment for electron-positron at TeV Signal processing for ASICSKIROC- analog waveform at the output of the
Scale, will allow to perform crucial study such as; Higgs boson, super- pre-amplifier and
symmetric particles, physics of top quark ... that at the output of
the shaping amplifier
were observed using
the monitor lines
by injecting a charge.
For the charge (energy)
information the
generated signal
falling edge positioned
1
in to the maximum of
Particle Flow Algorithm signal out of shaper
requires a fine granularity unit.
Calorimeter.
The Electromagnetic The hold signal can
Calorimeter (ECAL) is a help to digitize the
crucial part of ILD. the amplitude of analog waveform as a energy information, baseline
ECAL detector uses to study the noise level.
tungsten layer as a absorber and developed 18x18 cm 2 HAMAMATSU silicon
2
pixel (size 5x5 mm ) sensor will be employed as a light sensors.
Test setup with single ECAL prototype – consist of 4 ASIC, silicon pixel Results – is measurement of noise level, linearity with injecting charge and
sensor, detector interface (DIF), Link data aggregator (LDA) and clock 3 GeV electron energy.
control card CCC.
DIF - communication the ASIC with data acquisition (DAQ), controlling
LDA - aggregate the output of DIF and derive the signal to PC
CCC - start/stop DAQ
ASIC readout – concept developed due to requirement of physics program.
The requirements are:
* Small size
* Low noise
* Low power
* Large dynamic CONCLUSIONS
range
* Large number 
Prototype for high granularity ECAL developed
readout channels

The feature of ASIC performed with injected charge and electron beam
Prototype SKIROC2

Achieved signal to noise ratio is satisfied
64 channel 
Noise level is almost same for all the channel (in 4 ASIC) and there is
Dual gain
Dynamic range: no correlation observed.
0.5 – 2000 MIP (minimum ionizing particle)
Reference:
[1] M.Thomson:detectors for a future Lepton Collider : cern 18/2/2010
[2] omega.in2p3.fr