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ATLAS Upgrade R&D and Plans

ATLAS Upgrade R&D and Plans. Su Dong DOE proton review: SLAC ATLAS program Washington DC. June 11, 2009. The SLAC ATLAS Program: Upgrade R&D. Page 1. Peak Luminosity. Phase 2. Phase 2. Phase 1. Phase 1. 2009. 2015. 2020. 2009. 2015. 2020. LHC Luminosity Upgrade Road Map.

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ATLAS Upgrade R&D and Plans

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  1. ATLAS Upgrade R&D and Plans Su Dong DOE proton review: SLAC ATLAS program Washington DC June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 1

  2. Peak Luminosity Phase 2 Phase 2 Phase 1 Phase 1 2009 2015 2020 2009 2015 2020 LHC Luminosity Upgrade Road Map Integrated Luminosity 5 ab-1 1x1035 3x1034 700 fb-1 June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 2

  3. Perspective on superLHC Upgrade • superLHC may be an inevitable path for HEP: • Early discoveries would imply the effective extra energy reach at high lumi could uncover additional new particles. • If early phase of LHC not revealing new physics, it would be hard to argue for other new facilities. The effective additional energy reach of sLHC will be of central focus. • The upgrade activities at SLAC will be a key addition to better utilize the SLAC resources and expertise to complement current ATLAS efforts, as an integral buildup of the energy frontier effort. • sLHC detector design has unprecedented challenges: • Intense radiation: ~2x1016 particles/cm2 (10yr@1035) at R=4cm • Dramatic pileup background: ~400 interactions/crossing Need long lead time for R&D and construction. June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 3

  4. SLAC Tracking Upgrade Activities • Phase 1: Pixel Insertable B-Layer (IBL) project • Phase 2 (but some may become phase 1): • Pixel upgrade 3D sensors • Tracking upgrade mechanical designs • Pixel upgrade data transmission and stave electrical design • Silicon strip detector barrel stave electrical design • Tracking upgrade test stand and DAQ Leverage on past silicon experience from SLD (pixel), MK-II, GLAST, while explore synergy with future silicon detector design of SiD for ILC. Scientific staff: Mark Convery, Matt Graham, Philippe Grenier, Per Hansson, Jasmine Hasi, Paul Jackson, Chris Kenney, Peter Kim, Martin Kocian, David MacFarlane, Rich Partridge, Su Dong, Bill Wisniewski, Charles Young Technical staff: Karl Bouldin, Jim McDonald, David Nelson, Marco Oriunno, Matthias Wittgen June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 4

  5. Collaborative Effort on Upgrade • Close collaboration between LBNL, SLAC, Santa Cruz has supplied a strong force in the global ATLAS tracking upgrade. Coordinated activities: • Regular ~monthly meeting at SLAC • Several upgrade workshops hosted at the 3 institutions • Collective input for global ATLAS upgrade events • Global ATLAS Connections • Regular contributor to IBL working group meetings • Many presentations at various ATLAS upgrade workshops • ATLAS task force participation • Pixel b-layer replacement task force 2008 (Su Dong) • ATLAS tracker upgrade layout task force 2009 (Charles Young) June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 5

  6. Pixel Insertable B-Layer (IBL) • Before superLHC, pixel b-layer is expected to reach its radiation dose limit by ~300fb-1 (equivalent to 2 years @1x1034). • Cannot do simple b-layer replacement with <9 months shutdown. Plan is to insert a new b-layer inside present detector during the shutdown for phase-1 (2015). • SLAC activities: • Main contributor on inner service design studies • Stave electrical design studies and data transmission tests • 3D silicon sensor R&D as candidate sensor for IBL • Beyond baseline Read Out Driver upgrade option • Overall IBL design option performance evaluation June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 6

  7. 3.6cm 4.6cm 3650 mm 700 mm Pixel Insertable B-layer (IBL) June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 7

  8. sLHC Tracker Upgrade: Introduction All silicon upgrade inner detector replacing current pixel+SCT+TRT • Inner most pixel layer(s) need new sensor technology • New approaches to cooling, power deliver, data transmission and still trying to reduce material budget. (SLAC study of the layout geometry) June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 8

  9. Pixel Upgrade: 3D Silicon Sensor • 3D Sensor technology pioneered by Sherwood Parker et al is a primary candidate for inner most pixel layer(s): • Radiation hardness • Active Edge • The 3D R&D devices originated at the Stanford Nano-fabrication Facilities. Two members of the original team are now with SLAC. • SLAC/Stanford activities: • Remaining device R&D and assisting industrialized production. • Proton irradiation at LANL. • CERN test beam participation. • Integration of 3D sensor with ATLAS readout. Test stand preparation and beam test DAQ improvements. June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 9

  10. Pixel Upgrade: 3D Silicon Sensor Active Edge 3D sensor from SNF micro Carrierboard LANL Aug/09 proton irradiation preparation 800 MeV proton beam sensor FE June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 10

  11. Tracker Upgrade: CO2 Cooling • Cooling becomes a central focus for the larger and higher granularity silicon system for sLHC with bigger challenge to avoid thermal runaway. • CO2 cooling is widely perceived as a better alternative to the current C3F8 cooling system. High latent heat and high vapor pressure allow efficient heat transfer with smaller pipes for reduced material. Also a more environment friendly solution. • Despite the priority and broad interests, very little has been done on CO2 cooling in HEP. More practical for a national lab. • SLAC activities: • Already operating a blown system for mechanical prototype tests • Design of closed loop system under way to establish a major cooling test site up to stave level • Intend to engage in the design of overall tracker cooling system • Extend into pixel mechanical design involvement June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 11

  12. Tracker Upgrade: CO2 Cooling June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 12

  13. Tracker Upgrade: Data Transmission • The high hit density and high radiation at sLHC poses new challenges to data transmission. • Current pixel optical data transmission elements will not survive sLHC radiation dose, and even more difficult to work at the colder operating temperature of -300C expected from CO2 cooling. • SLAC is leading the unique alternative technology R&D with multi-Gb/s electrical transmission over microCoax cables. • Custom made twinax cable with optimized material choices for transmission performance, radiation hardness and minimize material budget. June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 13

  14. Tracker Upgrade: Data Transmission Gb/s electrical transmission with microCoax: CML protocol, using pre-emphasis and encoding techniques. Custom twinax cable: • Al wires and shield • Polyethylene dielectric Raw With Pre- emphasis Pre-emphasis demo with LAr kapton cable @ ~1Ghz Twinax bit error tests: 6 Gbit/s over 6m error free. Irradiation test and integration with GBT in preparation. 2mm June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 14

  15. Other Tracker Upgrade Activities • Si Strip stave electrical design and tests • Extensive technical contribution to electrical stave debugging and improved design. • Stave DAQ Buffer Control Chip jointly designed by UCL/SLAC and fabricated by SLAC. • High Speed I/O board originally designed for SLAC LCLS is adopted as stave test stand DAQ board. • Upgrade pixel test stand with multi-channel readout for stave level tests and test beam, using generic DAQ platform (see next topic). • Upgrade tracker layout study and simulation (see Charlie Young’s talk). June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 15

  16. SLAC Trigger/DAQ Upgrade Activities • The challenge of increasing data volume and trigger rates with luminosity is formidable. Trigger/DAQ upgrades/improvements are inevitable for ATLAS like every other experiment, but the detailed plans are far from clear. • One major R&D development path towards significantly improved DAQ readout architecture and bandwidth originated from SLAC. • Additional trigger upgrade activities also expected. • Scientific staff:Rainer Bartoldus, Martin Kocian, Andy Haas, Su Dong • Technical staff: Ric Claus, Gunther Haller, Mike Huffer, Jim Panetta, • Andy Salnikov, Matthias Wittgen June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 16

  17. DAQ Upgrade: Readout System • Current Read Out Drivers (ROD) have 7 different flavors for different subsystems and they cannot last 10 years. • The current ROS PC hosting custom-build ROBIN cards via PCI bus is close to performance limit for phase 1 luminosity. • The current Read Out Link (ROL) restricts bandwidth sharing, sensitive to fluctuations and limits L1 rate to <100Khz . 836 ROD 1574 ROL 145 ROS from frontend ROL (S-link) BOC ROD ROBIN PC 132MB/s P C I BOC ROD ROBIN ROBIN V M E 132MB/s BOC ROD … 100-1200MB/s 160MB/s ROBIN ethernet … … … ROS up to 6 ROBINs/ROS 132MB/s SBC ethernet Present system 40MB/s June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 17

  18. Processor 450 MHZ PPC-405 RCE board data instruction Boot Options Memory Subsystem Configuration 512 MByte RLD-II 128 MByte Flash Data Exchange Interface (DEI) ATCA crate with RCE & CIM DAQ Upgrade: ATCA based RCE Development • Generic high performance DAQ research at SLAC: Reconfigurable Cluster Element (RCE) concept on ATCA platform • Well advanced R&D serving many other SLAC projects already: Peta-cache, LCLS, LSST RCE board An RCE ATCA crate with RCE & CIM Combinatoric logic MGTs DSP tiles June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 18

  19. DAQ Upgrade: New Readout Concept • A possible new architecture with ATCA based RCEs and CIMs as building block with ROD and ROS merged into ROMs with 12 RCEs/ROM. • High bandwidth communication capacity between modules (1 GB/s between each pair) offers ideal platform for other use: • Level 1.5 triggers • L2 supervisor + ROI builder (ANL) • Pixel upgrade example: • Detector area ~2x current • Data rate ~18xcurrent • sLHC pixel has ~800x 3.2Gbps • 800/48 => 17 ROMs • (c.f. present 132 RODs+12 ROSes) Up to 12 ROMs per crate from frontend RTM ROM RTM ROM 48 x 3.2gb/s fibers/ROM A T C A RTM ROM … … … Possible upgrade architecture 24 GB/s per crate => 2 GB/s per ROM Shared bandwidth Less sensitive to local fluctuations CIM Dual star point-point Up to 4GB/s per slot ethernet The SLAC ATLAS Program: Upgrade R&D

  20. DAQ Upgrade: New Readout Concept • The RCE + CIM concept was presented at Feb/09 ATLAS upgrade week and Mar/09 ATLAS/CMS Electronics for sLHC workshop in 4 talks. • Significant interests from ROD developers from many subsystems with a common goal of exploring new ROD designs using the RCE development platform. The willingness to maximize commonality is very encouraging. • SLAC is organizing an RCE training workshop at CERN Jun/15-16 in conjunction with the ATLAS ROD upgrade workshop in the same week. • RCE test stand established at CERN for joint development (+limited distribution to institutions). • Collaborating communication via atlas-highlumi-REC-development e-group. June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 20

  21. Synergy between Projects The choice of projects had the efficient use of lab resource in mind to best utilize our expertise and aim for broader applications: • CO2 cooling, data transmission, teststand/DAQ are relevant for both strip and pixel detectors. • Teststand/DAQ, Gb/s transmission, Trigger/DAQ upgrade are based on electronics the general Trigger/DAQ experience. • We believe in the need to open up L1 bandwidth and working on the two key enabling aspects: tracker data transmission and DAQ upgrade. June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 21

  22. Summary and Outlook • We have identified many interesting directions making significant contributions to the ATLAS upgrades and started some detailed R&D and design. • We believe these directions speak to the real needs to complement existing upgrade effort. • There are strong synergies among the investigated projects to maximize utilization of SLAC expertise. • We intend to keep the broad vision of the overall ATLAS upgrade needs and pay attention to system design issues. We believe SLAC can play a major role in the ATLAS upgrade. June 11, 2009 The SLAC ATLAS Program: Upgrade R&D The SLAC ATLAS Program: Upgrade R&D Page 22

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