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ATLAS Inner Detector MO_B 2012 closure 2013 mid-year status 2014 request

ATLAS Inner Detector MO_B 2012 closure 2013 mid-year status 2014 request. H. Pernegger / Pixel PL & ID Resource Coordinator D. Robinson / SCT PL and ID PL A. Romaniouk / TRT PL. Report from April RRB. Book closing 2012. 2. Book closing 2012. Expenses by categories. 3. 2013 Budget.

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ATLAS Inner Detector MO_B 2012 closure 2013 mid-year status 2014 request

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  1. ATLAS Inner Detector MO_B 2012 closure2013 mid-year status2014 request H. Pernegger / Pixel PL & ID Resource Coordinator D. Robinson / SCT PL and ID PL A. Romaniouk / TRT PL

  2. Report from April RRB Book closing 2012 RRB July 2013 2

  3. Book closing 2012 Expenses by categories RRB July 2013 3

  4. 2013 Budget RRB July 2013 4

  5. Mid-year spending So-far spent about 53% of the budget Pixel L2 and SCT TX still to come Expenses to-date include much of 2013 manpower commitments RRB July 2013 5

  6. Main Cost Drivers and LS1 activities Manpower for LS1 scheduled work: Pixel : Integration of IBL and Pixel detector new Service Quarter Panel replacement ID: Installation of the new thermo-siphon C3F8 cooling system TRT: Address leak issue and consolidate gas system Consolidation of SCT readout: Order of new TX plug-ins and production of new BOC card. This consolidation of SCT readout is carried out with the current budget during the shutdown. The overall budget of the SCT is maintained at 637 kCHF RRB July 2013 6

  7. Pixel extraction / nSQP • New Service Quarter Panels (nSQP) will replace current Pixel services to move new opto-boards outside the Pixel detector volume (decided by ATLAS & Pixels in January 2013) • Thereby also repair of Pixel RO channels, redundant links, faster, installation of Diamond Beam Monitor,...) • Extraction of PIXEL done in April, now in SR1 clean room, un-cabling has been completed • Re-installation in UX15 from January to March 2014 followed by commissioning • Consolidate readout system to cope with Run 2 beyond-design luminosities RRB July 2013

  8. Integration of IBL • IBL Module and Staves • Module production now in full swing , expect to finish in September • Stave loading with modules has started with first 5 of 14 installed staves done • First tests on production stave in SR1 show good results • IBL integration • Tooling prepared • Work now on final assembly of support structures • Expect to start integration during August • IBL installation in March 2014 • Full commissioning of pixel starts May/June 2014 RRB July 2013 8

  9. Data taking in 2012 SCT and PIXEL operated with pileup and physics occupancy which far exceeded the original design levels for the highest foreseen LHC luminosities (e.g. 0.2-0.5% SCT occupancy with m~23 at L ~ 1x1034cm-2s-1) Pixel Occupancy for different Layers Pixel occupancy Test runs Physics Bunch Luminosity [10^30] Design m=80 Design RRB July 2013

  10. SCT DAQ Expansion Maximum sustainable L1 rate as a function of pileup, 14TeV, 25ns FEROD 8176 data links RODROS Existing 90 Slinks • 100kHz at m~33 • 100kHz at m~87 • We will adapt the existing DAQ system to cope with the high pileup conditions in Run2 • 90128 RODs and BOCs • Improved data compression on ROD • Both FE and ROD bandwidth compatible with pileup close to 90 at 100kHz RODROS With 128 Slinks and data compression • 100kHz at m~87 RRB July 2013

  11. SCT New Optical Transmitters (TX) Currently installed VCSELs were operationally robust during 2012,but two significant issues developed which impact on future operation: 2. Small but significant death rate 10% drop in optical power Number of deaths vs channel number Optical power (IPIN data) vs Date SCT will move to commercially packaged optical array assemblies, back engineered to match the mechanical and connectivity constraints of the existing BOC hardware and fibres Installation scheduled for Spring/Summer 2014 RRB July 2013

  12. Consolidation of Pixel readout Pixel readout: During next run LHC will reach “beyond-design luminosity” which will lead to data rates for which the Pixel readout was not built. The beyond-design peak luminosity leads to saturation on backend electronics This caused pixel detector inefficiency already in Layer 2 and will later cause inefficiency on Layer 1 The saturation and resulting inefficiency is a function of Luminosity, L1A rate, hit rate per double column, error rate and number of FE-chip with hits RRB July 2013 12

  13. Pixel Readout Col pairs ..9.. 16 x 40 Mb/s FE/MCC links EOC bufferand logic ... 16 FE.. MCC ROD 40, 80 or 160 Mb/s MCC/ROD links ..16.. MCC buffers ROD buffers The bandwidth between module and ROD depends on the layer: 160 Mb/s (2x80Mb/s) on two optical fibers for the B-layer 80 Mb/son one fiber for layer 1 and disks 40 Mb/son one fiber for layer 2 RRB July 2013 13

  14. Link occupancy at future luminosities • Pixel readout link Link Occupancy for different luminosities : 7x1033 at 50ns 1x1034, 2x1034 and 3x1034 at 25ns • MCCROD link occupancy at 75 and 100 KHz LVL1 rate: • At and above 2x1034 first Layer 2 will saturate, then followed by Layer 1 • Run 1 limitations at start of fill and due to ROD computing power limits whenm>> design • Priority for consolidation: Fix now Layer 2, followed later by Layer 1 RRB July 2013 14

  15. Layer 2 limitations already in 2012 • Observed already limitations during Run 1 at start of fill • Observe high number of desynchronized modules in Layer at start of fill. Decrease follows luminosity decrease Pixel IB

  16. Consolidation of Pixel readout • Consolidation of Pixel Layer 2 readout system by using IBL ROD/BOC for Layer 2/1. • Bandwidth increase: • L2: from 40 Mb/s to 80 Mb/s on a single fibre • L1: from 80 Mb/s to 160 (2x 80) Mb/s on two fibres • Usage of IBL boards for Pixel readout consolidation • Boards provide bandwidth and computing power safety margin also at high pileup • Adoption to Pixel can be done in firmware • B-Layer and disks shall remain with present ROD/BOC • opto packages will need replacements • Cost estimate based on IBL production number is 315 kCHF for Layer 2 consolidation • 120kCHF included in 2013 MO_B budget • Request additional 70kCHF for 2014 and 100kCHF for 2015 RRB July 2013 16

  17. TRT Gas system Pictures from inside of the PEEK pipes taken with Endoscope. This pipe should be repaired. Access outside is blocked. The only way to repair is from inside of the pipe. A special tool was developed and All active pipes at the exit of the TRT ECs were replaced (including not leaking ones). However some leaks were in inaccessible areas. and only way to keep leaks under control is a modification of the TRT Active Gas System. RRB July 2013

  18. Modification of TRT Active Gas system • Modification or replacement of different parts of the gas system to allow parallel operation with Argon • Distribution racks in UX area which includes a remote control of the gas flows through individual gas supply lines (80 channels). • Fully controlled Ar-mixer rack and analysis system to supply some parts of the TRT with Ar-mixture • Distribution module for Ar mixture (UX area) direct supply (without circulation) of some parts of the TRT with Xe-mixture with detailed monitoring of the gas consumption • Pressure control system in the gas return lines (USA area) • Improvements for better stability RRB July 2013

  19. Projection to end 2013 • 53% of the budget spent to date; • Large cost drivers which will come in next months include: • Pixel consolidation of readout for Layer 2/1 component order • SCT order for Lightable VCSEL arrays for TX plug-ins and BOC cards • Integration of IBL and new Pixel services integration, the change of the ID C3F8 cooling system and the TRT leak fixes are the core activities of the LS1 shutdown. Those activities dominate the manpower expenses • SCT will fully absorb -94kCHF negative carry-over not this year but in 2014. RRB July 2013

  20. Requests for 2014 Budget numbers in kChF RRB July 2013

  21. 2015 and beyond • For 2015 and beyond preserve a flat MO budget • Add IBL core electronics maintenance into 5% model of pixel. The readout of Layer 2/1 with IBL ROD/BOC will still contribute to 2015 expenses RRB July 2013

  22. Summary • Preserve model of spending 5% of core for electronics • Excellent experience, this is a good match to our needs, always sufficient number of spares available; • SCT managed to absorb TX failures in 5% maintenance model • Request for a 100 kCHF IDGEN manpower increase for 2014 as the shutdown is now the full two years • Main objectives are consolidation of C3F8 cooling, maintenance of heater system and re-commissioning of ID with new cooling systems (thermo-siphon and C02) • Cover the LS1 activities with today’s knowledge and based on 2013 experience • Request of additional 70+100 kCHF in 2014 and 2015 for electronics for Pixel readout consolidation • This is consolidate the Layer 2 readout ready for Run-2 • In Jan 2013 it was decided to de-install pixel and replace service quarter panels. The Pixel and IBL integration, installation and commissioning is the major LS1 activities for 2014 RRB July 2013

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