ETD: news since Perugia
• Progress was done on different elements of the architecture:
– Clock and control links: a commercial chipset from National
Semiconductor has been found which seems to fulfill the requirements
concerning the fixed latency and the clock jitter (DS92LV18)
• Its technology (CMOS8 => 0.25µ) has been validated in radiation up to
50krads in ATLAS.
• It also has to be validated by us, especially looking at SEUs and SELs
=> see talk from Alberto Aloisio in this session.
– The LOC2 chip, which is a rad-hard 16-bit/160MHz serializer designed
by our colleagues from Dallas for the upgrade of the LARG electronics
of ATLAS seems to be a potential candidate for SVT data readout at
2.5Gbits/s
• Work however continues on the commercial TLK2711A chip which was
originally selected for data readout => needs validation in radiation
– Work has started at LAL on thinking of the implementation of the FCTS
system => see talk from Daniel Charlet in this session
– Discussions started around a new design of the ROM in Padova,
Legnaro and Bologna
• The investigated idea is to drive a 10Gbit-Ethernet link directly from the
readout electronics without the assistance of microprocessors and software.
D.Breton – ETD session – SLAC SuperB Workshop – October 2009
ETD: overall system architecture
D.Breton – ETD session – SLAC SuperB Workshop – October 2009
ETD: expectations from this workshop
• In Perugia, subdetectors started presenting the way they will deal
with the overall architecture for their own design:
– This should appear more clearly this time since the last months allowed
people to understand the architecture more precisely
• For instance, we had a very fruitful technical discussion with our calorimeter
colleagues a few weeks ago.
– Now we hope to get close to be able to describe functional subsystems
coherent with each other at the experiment level
– Level 1 Trigger still remains an uncovered feature
• Baseline still remains BABAR’s philosophy (“activity trigger”), which allows people to
start working easily on this subject.
• Steffen Luitz was given the charge of steering the DAQ/online of
SuperB.
– We have to define the boundaries of this new item and define its
connections with other subsystems.
– Steffen will tell us a few words about his definition of “online” in this
session.
– A working meeting will take place at CERN beginning of November,
including discussions about the Level 1 Trigger
D.Breton – ETD session – SLAC SuperB Workshop – October 2009
ETD: miscellaneous
• ETD meetings between workshops:
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How ? (phone or EVO)
How often ?
Subjects ?
Suggestions ?