Fast Electronics of T0 Detector. Anatoly.Klimov@cern.ch 10 December 2004. Placement of T0 fast electronics. The electronic equipment (fast electronics) is assumed to be placed in VME crates and located in experimental area at the outer side of the L3 magnet.
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10 December 2004
The electronic equipment (fast electronics) is assumed to be placed in VME crates and located in experimental area at the outer side of the L3 magnet.
Signals from shoeboxes
go to analog splitters and
further to QTC, CFD–
The output pulses of the CFD –
discriminators through lines of a
delay go to 12 channel circuits
of coincidences (OR) for
generation of signals TO-A, TO-C.
Output pulses of QTC and CFD –
discriminators go to
TRM (TDC Readout Module)
for conversion and the subsequent
transfer in DAQ (Detector
Output pulses of multiplicity
discriminators, circuits of
coincidence (OR) and the block of
time discrimination (TVDC)
through NRZ module
are transferred in CTP
(Central Trigger Processor).
TVDC is in CAMAC standard
The given parameters obtained with the use of time-amplitude converter and flash ADC with the digital discriminator for TO-vertex signal generation.
Measured at the CERN accelerator
PMT position 2(shift = 18 cm)
The duration of delay slope is determined by the real resolution (FWHM) of the detectors used in the experiment
PMT position 1
TVDC calibration spectrum
The multiplicity level is adjusted discretely (8-bit)
MPD is in CAMAC standard
Pulse shape of the anode of the PMT
QDC doesn’t start analyze incoming amplitude signals until MPD produce ‘Strobe’ signal
Emulation of multiplicity of PMT output signals
Other units (CFD, Mean Timer, Delay Unit, Logical Unit etc.) have prototypes but need further development and tuning.
All electronics units was made in CAMAC standard.
It is necessary to develop this units in VME standard.
Functional part of
It suggested to place FE units on 6U VME boards and use universal VME decoder.
2 VME crates
6 Delays (4-ch. each)
6 QTCs (4-ch. each)
6 FAN-OUTs (4-ch. each)
12 CFDs (2-ch. each)
It is necessary to:
develop prototype of QTC and NRZ module
develop system of time synchronization (BC) for FE units
develop system of laser calibration for detector T0
choose appropriate CFD for precision time measurement
make uniform interfaces of DAQ and DCS