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News from the CERN Linear Collider Detector Project

News from the CERN Linear Collider Detector Project. Konrad Elsener CERN. Outline: Introduction LCD @CERN: why, who ? CLIC 3 TeV detector issues LCD @ CERN: Status and Plans Collaboration with ILC LCD and FCAL LCD plans on other Hardware / Engineering R&D Summary. Introduction.

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News from the CERN Linear Collider Detector Project

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  1. News from the CERN Linear Collider Detector Project Konrad Elsener CERN

  2. Outline: • Introduction • LCD @CERN: why, who ? • CLIC 3 TeV detector issues • LCD @ CERN: Status and Plans • Collaboration with ILC • LCD and FCAL • LCD plans on other Hardware / Engineering R&D • Summary News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  3. Introduction News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  4. Linear Collider Detector Project @ CERN • Motivation: • Substantial CLIC accelerator effort towards Conceptual Design Report (CDR) for end 2010 • Include CDR chapters on the CLIC physics potential, CLIC detector concepts and their related technological issues • CLIC detector concept will be similar to ILC ... • … with a few challenging differences ! • Note: many years of investment in ILC e+e- physics/detector simulations, hardware R&D and detector concept studies • LCD@CERN: Working together with the ILC detector concepts and with the linear collider detector technology collaborations to study modifications to the ILC concepts for CLIC energies and beam conditions. News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  5. Linear Collider Detector Project @ CERN Who are we ? Lucie Linssen (project leader) – project started in January 2009 Dieter Schlatter Konrad Elsener (FCAL, MDI) Peter Speckmayer (fellow) Christian Grefe (PhD student) Andre Sailer (PhD student) Marco Battaglia (paid associate, 2009) + three additional fellows hired (will start later in 2009) + part time help from CERN staff + CERN contribution to EUDET + help from colleagues in FCAL, LC-TPC, CALICE, ILD and SiD, etc. LAPP Annecy (J.J. Blaising, J. Blaha), ETH Zurich (A. Hervé) and many more.... (apologies !) Linear Collider Detector web site: http://www.cern.ch/lcd News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  6. CLIC detector issues • Main differences with ILC: • Energy 500 GeV -> 3 TeV • More severe background conditions • (beam-beam effect) • due to higher energy • due to smaller beam sizes • Time structure of the accelerator • Synchrotron radiation in the • magnetic field of the detector 3TeV e+e- -> W+W- -> qqqq News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  7. CLIC time structure Train repetition rate 50 Hz CLIC CLIC: 1 train = 312 bunches 0.5 ns apart 50 Hz ILC: 1 train = 2820 bunches 308 ns apart 5 Hz • Consequences for CLIC detector: • Need for detection layers with time-stamping • Inner-most tracker layer with ~ns resolution • or …. all-detector time stamping at the 10 ns (?) level • Readout/DAQ electronics will be different from ILC • Power pulsing has to work at 50 Hz instead of 5 Hz News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  8. CLIC 3 TeV Beam-induced background Backgrounds: Due to the higher beam energy and small bunch sizes backgrounds are significantly more severe at CLIC. Main backgrounds: • CLIC 3TeV beamstrahlung average energy loss: 29% (10×ILCvalue) • Coherent pairs (3.8×108 per bunch crossing) <= disappear in beam pipe • Incoherent pairs (3.0×105 per bunch crossing) <= suppressed by strong solenoid-field • gg interactions => hadrons ( 3 hadron events per bunch crossing) • Muon background from upstream linac • More difficult to stop due to higher CLIC energy (active muon shield ?) News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  9. CLIC 3 TeV centre-of-massenergy spectrum • Due to beam-beam effects: • At 3 TeV only 1/3 of the luminosity is in the top 1% centre-of-mass energy bin • asymmetric situation -> many events with large forward / backward boost News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  10. CLIC synchrotron radiation,solenoid, anti-DiD etc. …3 TeV, crossing angle 20 mrad • Work by Barbara Dalena, CERN (CLIC study team): • PAC’09 contributed paper • “Solenoid and Synchrotron Radiation Effects at CLIC” • presentation at ILC-CLIC LET Beam Dynamics Workshop, 24 June 2009 • http://indico.cern.ch/contributionDisplay.py?contribId=20&sessionId=3&confId=56133 News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  11. CLIC synchrotron radiation,solenoid, anti-DiD etc. … Work by Barbara Dalena, CERN (CLIC study team): CLIC 20 mrad News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  12. CLIC synchrotron radiation,solenoid, anti-DiD etc. …very recent results - preliminary Work by Barbara Dalena, CERN (CLIC study team): -> Anti-DiD is bad for luminosity at 3 TeV Work by André Sailer (cf. talk later this afternoon): -> Anti-DiD is badly needed (BG !) PS. Barbara Dalena, PAC’09: A longer detector (solenoid) makes things worse ! News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  13. CLIC IP intra-train feedback (?) cf. Phil Burrows (Oxford) presentation at ILC-CLIC LET Beam Dynamics Workshop, 24 June 2009 http://indico.cern.ch/materialDisplay.py?contribId=11&sessionId=10&materialId=slides&confId=56133 avoid delays (“latency”) preferably BPM and Kicker at about 2 m from the IP needs to be studied (additional source for backscattering) News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  14. CLIC IP intra-train feedback (?) cf. Phil Burrows (Oxford) presentation at ILC-CLIC LET Beam Dynamics Workshop, 24 June 2009 http://indico.cern.ch/materialDisplay.py?contribId=11&sessionId=10&materialId=slides&confId=56133

  15. LCD @ CERN : Status and Plans News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  16. LCD collaboration with ILC LCD@CERN has joined existing linear collider groups: • ILC detector concepts(LCD members signed LoI’s) • ILD • SiD • 4th concept • Technology collaborations (formal agreements / letters) • LC-TPC (TPC development) • CALICE (calorimetry based on Particle Flow Analysis) • FCAL (very forward region studies) • European project (CERN is member) • EUDET News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  17. LCD project plans Most of the R&D currently carried out for the ILC is also relevant for CLIC. In several areas, the detectors for CLIC will be more challenging than the detector concepts for ILC. Besides extensive simulation studies and software development for the CLIC detector studies, CLIC-specific hardware and engineering development is required in a number of areas. Current scenario: Conceptual Design Report: end 2010 Technical Design Report: 2015 News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  18. LCD working with FCAL • initiated by Lucie Linssen in 2008 • mask studies by Andrey Sapronov (summer 2008) • CLIC LumiCal studies by Iftach Sadeh • forward region and background studies by André Sailer • near future: work on beam-beam effect on Bhabha events (BHSE); other systematics on LumiCal measurements; improved understanding of BeamCal and backgrounds • on our list of important topics: radiation hard sensors for BeamCal (start learning about sensors, e.g. this week) News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  19. LCD working with FCAL what could CERN help with ? (with LCD as intermediary) --- we are open for discussion --- Examples : • special printed circuits (layers e.g. on thin foils, complex structures such as GEM, etc.) Rui de Oliveira in EN-ICE-DEM • advice on conductive glue and its problems, alternatives • bonding laboratory (wide range of experience) Ian McGill, Michael Moll in PH-DT-TP • invitations to CERN, e.g. to initiate contacts News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  20. News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  21. otherHardware/Engineering R&D Hardware/engineering R&D needed beyond present ILC developments: • Time stamping • Most challenging in inner tracker/vertex region • Trade-off between pixel size, amount of material and timing resolution • Power pulsing and other electronics developments • In view of the CLIC time structure • Hadron calorimetry • Dense absorbers to limit radial size (e.g. tungsten) • PFA studies at high energy • Alternative techniques, like dual readout • Solenoid coil • Reinforced conductor (building on, but beyond CMS/ATLAS) • Large high-field solenoid concept • Precise stability/alignment studies • In view of sub-nm precision required for FF quadrupoles • Overall engineering design and integration News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  22. LCD in the CERN MTPapproved by Council on 18 June 2009 News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009 22

  23. Summary • CLIC physics & detector studies re-started in 2008; • LCD@CERN: a project as of 2009, resources in CERN MTP • (timely in view of CLIC accelerator effort and CDR deadline end 2010) • co-operation with ILC concepts and collaborations • LCD@CERN • integrates in on-going world-wide LC physics/detector studies • profits from investment in ILC physics/detector simulations, • hardware R&D and detector concepts (e.g. FCAL) • Thank you very much for your help ! News from LCD@CERN – presented by K. Elsener, FCAL meeting Zeuthen, 29-30 June 2009

  24. SPARE SLIDES

  25. CLIC Tracking Vertex and Tracking issues: • Due to beam-induced background and short time between bunches: • Inner radius of Vertex Detector has to become larger (~30 mm) • High occupancy in the inner regions • Narrow jets at high energy • 2-track separation is an issue for the tracker/vertex detector • Track length may have to increase (fan-out of particles within jet) 3TeV e+e-->t tbar Lucie Linssen, SPC, 15/6/2009

  26. distance of leading particles in jets Jean-Jacques Blaising, LAPP Lucie Linssen, SPC, 15/6/2009

  27. Extrapolation ILC = > CLIC <= 10% beam crossing in ILD detector at 500 GeV Adrian Vogel, DESY • For full LDC detector simulation at 3 TeV • Simulation of e+e- pairs from beamstrahlung • Conclusion of the comparison: • ILC, use 100 BX (1/20 bunch train) • CLIC, use full bunch train (312 BX) • CLIC VTX: O(10) times more background • CLIC TPC: O(30) times more background • LDC 3 TeV, with forward mask Lucie Linssen, SPC, 15/6/2009

  28. Tentative long-term CLIC scenario Technology evaluation and Physics assessment based on LHC results for a possible decision on Linear Collider with staged construction starting with the lowest energy required by Physics Conceptual Design Report (CDR) Technical Design Report (TDR) Project approval ? First Beam? Lucie Linssen, SPC, 15/6/2009

  29. CLIC parameters Lucie Linssen, SPC, 15/6/2009

  30. Alternative to PFA calorimetry • Basic principle: • Measure EM shower component separately • Measure HAD shower component separately • Measure Slow Neutron component separately Dual R&D on dual/triple readout calorimetry Triple EM-part=> electrons => highly relativistic => Cerenkov light emission HAD-part=> “less” relativistic => Scintillation signal Slow neutrons => late fraction of the Scintillation signal Requires broader collaboration on materials + concept Lucie Linssen, SPC, 15/6/2009

  31. Precise alignment/stability • Precise alignment studies/technologies • Beam focusing stability !! • How to link left-arm and right-arm? • Lumical =>measurement using Bhabha scattering • Alignment of last quadrupoles at +- 3.5 m • ILC alignment requirements => <4 μm (x,y), <100 μm (z) • CLIC requirement is be more severe Daniel Schulte CLIC08. Leszek Zawiejski, FCAL collab.

  32. SiD Forward Region LumiCal 20 layers of 2.5 mm W + 10 layers of 5.0 mm W BeamCal 50 layers of 2.5 mm W ECAL Beampipe +/- 94 mrad (detector) +101 mrad, -87mrad (ext. line) 3cm-thick Tungsten Mask 13cm-thick BoratedPoly Centered on the outgoing beam line Lucie Linssen, SPC, 15/6/2009

  33. Lucie Linssen, SPC, 15/6/2009

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