Transcript Diapositive 1 - indico in2p3

On detector electronics:
High voltage part
Tilecal session in ATLAS upgrade week (Tuesday 10 November 2009)
François Vazeille
 What are the constraints for
the Dividers and the HV regulation?
 Proposed R&D scheme
 Status at Clermont-Ferrand
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What are the constraints for
the Dividers and the HV regulation?
 HV Dividers (see the specifications in my previous talks)
- To fit the space inside the PMT Blocks,
as interface in between the PMT and the 3in1 card without any cable.
- To keep the PMT linearity in the extreme sLHC luminosity, within 1%.
 HV regulation (see the specifications in my previous talks)
- To reach at least the 0.5 V rms regulation stability, as specified by Tilecal.
- To be better by reaching the present ATLAS performances
at least 10 times better.
- To improve the present reliability and to bring new facilities
(Individual switching, access…)
knowing that the radiations will be bigger by about a factor 10 in the pit.
 In any case, the cost and the funding will drive the final solution.
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Proposed R&D scheme
DIVIDERS
 New design using transistors in the last stages.
2009
0.5 FTE (0.25 Ie, 0.15 Tm, 0.1 on-line)
 Comparison tests of old/new designs using the PMT Test Bench,
by putting DC currents simulating the MB induced events at sLHC.
 Rebuilding of the Divider Test Bench.
2010
 Choice of active components with respect to the expected radiation,
and radiation tests of new Dividers.
0.6 FTE (0.3 Ie, 0.1 Tm, 0.2 on-line)
 Final scheme fitting the final 3in1 new design.
Depending from
the 3in1 schedule
Man power not yet estimated
but not big.
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HV REGULATION
- 6 solutions + ASIC Options *
- Manpower if chosen
On Drawers
USA15
Option 0: Full re-use
- Aging: at least 15 years old in 2019.
- Radiations? True radiation level waited.
- Compatibility with new Drawers.
- No R&D manpower, except maintenance.
Option 3: Re-use of present cards
- Aging: at least 15 years old in 2019.
- Integration in USA Racks: space?
- Long cables for services + Drawer Bus.
- R&D manpower : 2.0 FTE (0.5Ie, 0.5Te,
0.5Tm + 0.5 on-line)
Option 1*: New design with COTs
- New radiation tests.
- New design.
- R&D manpower: 4.0 FTE (2Ie, 1Te + 0.5
Test Benches + 0.5 on-line)
Option 4*: New design
- Conception and integration in USA15,
including HV source (commercial?).
- Long cables for services + Drawer Bus.
- R&D manpower : 3.5 FTE (1.5Ie, 0.5Te,
0.5Tm, + 0.5 Test Benches + 0.5 on-line)
Option 2*: New design with radhard
components
… COST!
- Radiation tests to validate.
- New design
- R&D manpower : 4.0 FTE (2Ie, 1Te + 0.5
Test Benches + 0.5 on-line)
Option 5: Commercial solution (CAEN?)
… COST!
- Integration and long cables for
services + Drawer Bus.
- R&D manpower : 1.5 FTE (0.5Ie and Te,
0.5Tm + 0.5 on-line)
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 Schedule:
• In 2010:
- Comparison of the 6 (or 9) solutions, including the costs.
R&D manpower: 1 Ie.
- Propositions and final choice,
knowing that the funding will play an important role.
• In 2011-2012: Final design, with new Test Benches and other tests
 See the previous table for the requested manpower.
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Status at Clermont-Ferrand
DIVIDERS
At this moment: fits the foreseen schedule,
with manpower in 2009-10 and funding in 2009 (10 K€).
• New design
- Made (Michel Crouau).
- Order of components for 20 Dividers.
 Delivery end January 2010.
- Lab tests on some Dividers
 First validation.
 Design and validation of new Divider Test Bench (Not before February).
- Systematic tests on the new Divider Test Bench, then on the PMT Test Bench.
using 20 PMT/Divider sets, before July.
• Divider Test bench (from the previous Test Bench)
- Mechanics: OK (Pierre Verdier).
- Electronics and commands: OK  new Labview version (Roméo Bonnefoy),
except new test about DC current injection in transistors: in progress.
- On-line: in progress, Roméo then Patrick Lafarguette.
• Radiation tests to organize and to prepare in 2010,
with an active Test Bench during the radiation exposure.
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HV REGULATION
 The Clermont-Fd team is officially authorized (by LPC management) to work on
the comparison in 2010, and to make preliminary tests when requested.
- Manpower as requested : 1 Engineer in electronics.
- Table of options: first studies in 2009 by Robert Chadelas,
including the first cost estimates (From 0.5 M€ to more than 3 M€).
- Activity going on in 2010,
including special tests (Regulation loop, long cables and noise…).
 Once the final option will be chosen by Tilecal
 New request for manpower to LPC management.
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