20-Mar-07 20-Mar-07 [email protected][email protected]1 Joint Atlas CMS SLHC Optoelectronics Joint Atlas CMS SLHC Optoelectronics Working Group Working Group Francois Vasey on behalf of WG Francois Vasey on behalf of WG Working Group History Working Group History and and Status Status Results Results Two (not so common) Two (not so common) development projects development projects Conclusions Conclusions
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Joint Atlas CMS SLHC Optoelectronics Working Group Francois Vasey on behalf of WG
Joint Atlas CMS SLHC Optoelectronics Working Group Francois Vasey on behalf of WG. Working Group History and Status Results Two (not so common) development projects Conclusions. Joint WG started in 2005 23 June 2006: Proposal for a different operating mode. - PowerPoint PPT Presentation
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Joint Atlas CMS SLHC Optoelectronics Working Joint Atlas CMS SLHC Optoelectronics Working GroupGroup
Francois Vasey on behalf of WGFrancois Vasey on behalf of WG
Working Group HistoryWorking Group History and and StatusStatusResultsResultsTwo (not so common) Two (not so common) development projectsdevelopment projectsConclusionsConclusions
23 June 2006: Proposal for a different operating 23 June 2006: Proposal for a different operating mode mode
Move from reporting to collaborating modeMove from reporting to collaborating mode Identify the areas of expertise of collaboratorsIdentify the areas of expertise of collaborators Collaborate in smaller subgroups, organize topical Collaborate in smaller subgroups, organize topical
meetingsmeetings Prepare common R&D proposalsPrepare common R&D proposals Report at bi-yearly plenary meetingsReport at bi-yearly plenary meetings
Link on chip SOS (SMU, ongoing)Link on chip SOS (SMU, ongoing) Versatile bidirectional link (CERN, proposal)Versatile bidirectional link (CERN, proposal)
10 institutes below 3 FTE (0.8 average)10 institutes below 3 FTE (0.8 average) Mostly involved in testingMostly involved in testing
Core activity: ex-ATLAS and CERNCore activity: ex-ATLAS and CERN Optoelectronics developments and testingOptoelectronics developments and testing
Periphery: ex-CMSPeriphery: ex-CMS Hybrids, Backends, system modelingHybrids, Backends, system modeling
concentrate on a few common projectsconcentrate on a few common projects only only Work in small subgroupsWork in small subgroups Work in collaborative mode with convergence Work in collaborative mode with convergence
datesdates Identify sub-projects of general interest before Identify sub-projects of general interest before
end 2006end 2006
Did not agree on common link developmentDid not agree on common link development
Dec 06: 3 Themes for joint Dec 06: 3 Themes for joint projectsprojects
Group a- Lessons learned and to be learned from Group a- Lessons learned and to be learned from LHC. LHC.
K.K. Gan (Ohio)K.K. Gan (Ohio) F. Vasey (CERN)F. Vasey (CERN) T. Weidberg (Oxford)T. Weidberg (Oxford)
Group b- Radiation hardness and reliability of Group b- Radiation hardness and reliability of optoelectronic components for SLHC. optoelectronic components for SLHC.
J.M. Brom (Strasbourg)J.M. Brom (Strasbourg) K. Gill (CERN)K. Gill (CERN) C. Issever (Oxford) plus ATLAS institutes participating to C. Issever (Oxford) plus ATLAS institutes participating to
SLHC radiation test programmeSLHC radiation test programme
Group c- Common optical link reference test Group c- Common optical link reference test bench.bench.
J-M Brom (In2P3 Strasbourg)J-M Brom (In2P3 Strasbourg) B. Checcucci (INFN Perugia)B. Checcucci (INFN Perugia) J. Coughlan (RAL)J. Coughlan (RAL) K.K Gan (UofOhio)K.K Gan (UofOhio) C. Hill (Bristol)C. Hill (Bristol) T. Romanteau (In2P3 Polytechnique)T. Romanteau (In2P3 Polytechnique) R. Russack (UofMinnesota), D. Baden (UofMaryland)R. Russack (UofMinnesota), D. Baden (UofMaryland) J. Ye (SouthernMethodistUniversity)J. Ye (SouthernMethodistUniversity)
Cost: lessons learnedCost: lessons learned All optical links ended up being expensiveAll optical links ended up being expensive
~ 300 CHF/link, production cost~ 300 CHF/link, production cost 25%-30% for cables and connectors (more for Atlas Pixels)25%-30% for cables and connectors (more for Atlas Pixels) 70%-75% for actives + hybrid/flex70%-75% for actives + hybrid/flex Plus 10% - 30% development costPlus 10% - 30% development cost
Overproduction (included in cost)Overproduction (included in cost) Covers assembly yield, test systems and prototypes, QA Covers assembly yield, test systems and prototypes, QA
testing, installation yield, unforeseen problemstesting, installation yield, unforeseen problems Up to 130% - 140% * needed quantityUp to 130% - 140% * needed quantity Spares down to % levelSpares down to % level
Maximize bandwidth usage, limit number of variants, Maximize bandwidth usage, limit number of variants, foresee overproductionforesee overproduction
Do not allow cost estimates to drive technology Do not allow cost estimates to drive technology choices.choices.
Over 180 MY of effortOver 180 MY of effort R&D:Prod:Install 45%:45%:10% R&D:Prod:Install 45%:45%:10% 11 years11 years Not included in ATLAS SCT and CMS TK project costNot included in ATLAS SCT and CMS TK project cost
Effort per link seems to stabilize above 10k pcsEffort per link seems to stabilize above 10k pcs Very few points, large uncertaintyVery few points, large uncertainty
Share resources for systems < 10k linksShare resources for systems < 10k links 10k links ~ 30 MY10k links ~ 30 MY Institute in charge should have more than 3 FTEs during Institute in charge should have more than 3 FTEs during
SystemSystem Avoid use of single fibres and pigtails on detectorAvoid use of single fibres and pigtails on detector Do not allow excessive fibre-slack without Do not allow excessive fibre-slack without
corresponding management scheme.corresponding management scheme. Use ruggedized ribbon/fiber only.Use ruggedized ribbon/fiber only. Avoid simplified and/or compact connectors which Avoid simplified and/or compact connectors which
are fragile and difficult to dismount and clean.are fragile and difficult to dismount and clean. Always use balanced codesAlways use balanced codes Separate front-end and opto-modules (i.e. with Separate front-end and opto-modules (i.e. with
Develop and distribute fibre-test tools which allow on-line channel Develop and distribute fibre-test tools which allow on-line channel quality testing, providing immediate feedback during construction.quality testing, providing immediate feedback during construction.
Ensure QA is for identical conditions to final systemEnsure QA is for identical conditions to final system Test system with all final production components before launching Test system with all final production components before launching
productionproduction Do more longer term testingDo more longer term testing Improve traceability of production lotsImprove traceability of production lots Respect ESD precautionsRespect ESD precautions
Excellent overall qualityExcellent overall quality Built in redundancy helps mitigate failuresBuilt in redundancy helps mitigate failures Do not relax QADo not relax QA Do not compromise ruggednessDo not compromise ruggedness
Quality to be regularly reviewedQuality to be regularly reviewed System performance to be monitoredSystem performance to be monitored Technology lessons still to be writtenTechnology lessons still to be written Full document ready for TWEPP07 Prague?Full document ready for TWEPP07 Prague?
Joint ATLAS CMS noteJoint ATLAS CMS note
Results are immediately usefulResults are immediately useful ATLAS and CMS not vastly different, with ATLAS and CMS not vastly different, with
Radiation hardnessRadiation hardness How do we manage all this work with so few people?How do we manage all this work with so few people?
Define a minimal-sufficient set of tests requiredDefine a minimal-sufficient set of tests required Define and agree on common protocoles and proceduresDefine and agree on common protocoles and procedures select one or a limited number of baseline system options select one or a limited number of baseline system options
and then concentrate on testing these componentsand then concentrate on testing these components Attempt to share the load and the resultsAttempt to share the load and the results
Next subgroup meeting to be called by C. IsseverNext subgroup meeting to be called by C. Issever
In the meantime, 5 independent irradiation tests In the meantime, 5 independent irradiation tests plannedplanned
Working Group C: Common Reference benchWorking Group C: Common Reference bench
J-M Brom (In2P3 Strasbourg)J-M Brom (In2P3 Strasbourg) B. Checcucci (INFN Perugia)B. Checcucci (INFN Perugia) J. Coughlan (RAL)J. Coughlan (RAL) K.K. Gan (UofOhio)K.K. Gan (UofOhio) C. Hill (Bristol)C. Hill (Bristol) T. Romanteau (In2P3 T. Romanteau (In2P3
Polytechnique)Polytechnique) R. Russack (UofMinnesota), R. Russack (UofMinnesota),
D. Baden (UofMaryland)D. Baden (UofMaryland) J. Ye J. Ye
Next subgroup meeting to be called by J. YeNext subgroup meeting to be called by J. Ye How many independent setups built in the How many independent setups built in the
Joint Optoelectronics Working Group Resources Distribution
Series1
5
6.6
11.4
CERN
EU
US
12.8
10.2 ATLAS
CMS
Two development projectsTwo development projects
22March 20 2007
Silicon-On-Sapphire (SOS) 0.25 Silicon-On-Sapphire (SOS) 0.25 m Technology m Technology EvaluationEvaluation
J. Ye et al., SMUJ. Ye et al., SMU Peregrine 0.25 m SOS has been evaluated and is found to
be suitable for rad-hard ASIC development for LHC upgrade. No special layout technique (ELT, guard ring) is needed.
Technology Advantages: Low power, low cross talk, good for mixed signal ASIC designs. Economical for small to medium scale ASIC development. A
multi-project run of 3×3 mm2 for 100+ chips cost ~$35k. TID on transistors with gamma (Co-60):
With a floating substrate and up to 4 Mrad, leakage current increase is observed but saturates after ~ 100 krad. This increase anneals back at room temperature in a few weeks.
With a grounded substrate during irradiation, there is no measurable leakage current and threshold voltage change in both NMOS and PMOS.
The mechanism of the grounded substrate is under study. SEE using shift registers with 230 MeV proton:
No SEE was observed with flux < 1×109 proton/cm2/sec. All shift registers function error free after a total fluence of
1.9×1013 proton/cm2 and ionizing dose of 106 Mrad (Si).
23March 20 2007
Link-On-Chip (LOC) 1st PrototypeLink-On-Chip (LOC) 1st Prototype J. Ye et al., SMUJ. Ye et al., SMU
Status: A 2.5 Gbps LOC1 prototype
chip has been designed and submitted for fabrication. Chips will be back to SMU for tests and evaluations in mid May.
If the tests (in-lab and irradiation) for LOC1 are successful, LOC2, which is aimed at a complete serializer chip of 2.5 to 3.125 Gbps data rate, will be designed and submitted in Spring to Summer of 2008.
Fiber attachment schemes will be studied after the functional tests of LOC1.
LOC1
24March 20 2007
GOL Test up to 100 MradGOL Test up to 100 Mrad J. Ye et al., SMUJ. Ye et al., SMU
Test with 230 MeV proton beam TID: survived 106 Mrad (Si) without current increase. Chip fully
functioning during and after irradiation. SEE: no error when flux < 1×109 proton/cm2/sec. When flux =
5×1011 proton/cm2/sec, error cross section is measured to be 1.1×10-13 error·cm2/proton (loss of link) and 1.1×10-14 error·cm2/proton (bit error).
Jitter:Complies with the modified (1.6Gbps vs 1.25 Gbps) IEEE
Gigabit Ethernet standards.
Before irradiation After irradiationJitter
ComponentsTx clk Serial Data Tx clk Serial Data
Random (RMS) 10.2ps 4.6ps 11.1ps 4.7psDeterministic (Pk-Pk)
Joint ATLAS CMS SLHC Optoelectronics WG Joint ATLAS CMS SLHC Optoelectronics WG exists and is well aliveexists and is well alive
3 subgroups defined3 subgroups defined WGa is already producing useful resultsWGa is already producing useful results WGb and WGc are on the right track, but still need WGb and WGc are on the right track, but still need
to get organized to reach cruising speed.to get organized to reach cruising speed. More results at TWEPP07More results at TWEPP07
Independent projects and tests are running in Independent projects and tests are running in parallel to common effort.parallel to common effort. Keep diversity in common test frameworkKeep diversity in common test framework