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Forward region studies of the CLIC detector Konrad Elsener for the LCD @ CERN team

Forward region studies of the CLIC detector Konrad Elsener for the LCD @ CERN team. LCD @ CERN. Linear Collider Detector Project at CERN Who are we ? Lucie Linssen (project leader) Dieter Schlatter Konrad Elsener Peter Speckmayer (Fellow) Christian Grefe ( Doct )

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Forward region studies of the CLIC detector Konrad Elsener for the LCD @ CERN team

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  1. Forward region studies of the CLIC detector KonradElsener for the LCD @ CERN team SLAC SiD workshop Konrad Elsener (CERN)

  2. LCD @ CERN Linear Collider Detector Project at CERN Who are we ? LucieLinssen (project leader) Dieter Schlatter KonradElsener Peter Speckmayer (Fellow) Christian Grefe (Doct) Andre Sailer (Doct) Marco Battaglia (PDSA) + part time help from CERN staff, + visitors + CERN contribution to EUDET LAPP Annecy ETH Zurich STFC-RAL Jean-Jacques BlaisingAlain Hervé Marcel Stanitzki Jan Blaha (Doct) Jan Strube SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 2

  3. LCD @ CERN Linear Collider Detector Project at CERN What is our goal ? We are working towards a linear collider detector which will operate in an energy range (CM) from 500 GeV to 3 TeV . Working together with the ILC concepts (SiD, ILD, 4th) and with detector collaborations (LC-TPC, EUDET, FCAL, CALICE) – next is DevDet . In a concerted effort with the individual concepts, we work towards describing the possible changes or upgrades to the ILC concepts to make them compatible with multi-TeV energies and CLIC beam conditions. SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 3

  4. ILC ≠ CLIC: Forward region studies Crossing angle 14 mrad20 mrad beam-beam effects3 TeV bunch spacing 374 ns 0.5 ns solenoid field (?), anti-DiD (?); L* and FF quads ... -> design of forward region: ILC ≠ CLIC background in forward calorimeters (+ “details” for luminosity measurement) -> background in vertex + tracking detectors (+ in-direct background from BDS + post-collision line) SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 4

  5. Example : ILD concept SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 5

  6. Example : ILD concept SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 6

  7. Example : ILD concept SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 7

  8. 500 GeV -> 3 TeV • Aim to have a detector which operates well over the • full energy range from 500 GeV to 3 TeV • Vertex detector + vacuum pipe will certainly • have to be changed during the upgrade to 3 TeV • Forward calorimeters might have to be replaced • (under study) SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 8

  9. 500 GeV -> 3 TeV • NOTE that at 3 TeV, “top” physics is more forward • than at 500 GeV • impact on tracking and calorimetry • impact on “aspect ratio” (barrel vs. FW, solenoid), etc. • much physics simulation work to be done • too early to decide on “boundaries” SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 9

  10. Example central region: ILD 2400 mm SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 10

  11. Example forward region: ILD 3475 mm SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 11

  12. Example forward region: ILD SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 12

  13. CLIC detector (2) – ILD’ish Andre Sailer, CERN • Use the full ILD detector model (MOKKA – GEANT4) • - modified crossing angle to 20 mrad • modified solenoid field to 4 T • (anti-DiD is modified automatically) • modified vertex detector inner-most layer to R = 30 mm • (adjust other layers manually) • - added the ILC FF quad (supercond. twin-quad) + vac. • so far, no change to LumiCal or BeamCal dimensions SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 13

  14. CLIC detector (2) – ILD’ish Andre Sailer, CERN 3TeV GuineaPig 150’000 incoherent pairs (300’000 particles) -> 88% of 1 BX BG hits in the ILD vertex detector (3 double-layers) w/origin of BG hit SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 14

  15. CLIC detector (2) – ILD’ish Andre Sailer, CERN 3TeV GuineaPig 150’000 incoherent pairs (300’000 particles) -> 88% of 1 BX origin of BG hits in tracking detectors SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 15

  16. CLIC detector (2) – ILD’ish Andre Sailer, CERN add 10 cm of graphite SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 16

  17. CLIC detector – a first look at LumiCal IftachSadeh, Tel Aviv University GeV Energy deposition in X-Y, integrated over full depth of CLIC-style LumiCal (40 layers W-Si calorimeter) 10 bunch crossings, 3 TeV - shows the segmentation of the LumiCal (Outer Radius = 35 cm) 3 TeV, 0 mrad crossing, 4 T field SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 17

  18. CLIC detector – a first look at LumiCal IftachSadeh, Tel Aviv University Hits on front-face of LumiCal (-> VTX background): CLIC 3 TeV, 20 mrad crossing, 4 T field, no DiD, 10 BX SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 18

  19. Next steps for LumiCal visitors from FCAL collaboration, Tel Aviv, Belgrade, Bucharest Account for the fact that BG from 312 BX will be overlayed in LumiCal Effect of switching off anti-DiD Change LumiCal dimensions (persently ILD values) Beam-Beam effect on Bhabha events (BHSE) – systematics on luminosity (with D. Schulte) Physics background and LumiCal performance Look at non-perfect collisions SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 19

  20. CLIC detector forward region – next Effect of switching off anti-DiD (change in background at VTX, TPC ...) Energy deposition in BeamCal (radiation hardness of sensors) BeamCal useful for beam monitoring ? (with D. Schulte) Change of BeamCal dimensions (if needed) Introduce a (conical?) mask between BeamCal and LumiCal (if needed) Look at neutrons (connect to work on BG from post-collision line, M. Salt, Cockcroft Inst.) Look at non-perfect collisions for BeamCal SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 20

  21. LCD project plan -> 2014, and MDI Detector solenoid – field, dimensions (aspect ratio) (SC conductor R&D) Contribute to detailed design of forward region / integration (simulations, work on radiation hard sensors, electronics & readout, etc.) Engineering aspects e.g. push-pull, stabilisation, vibrations, integration, services etc. -> EN + GS departments, vacuum pipe + equipment -> TE department SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 21

  22. SUMMARY • In PH department, the new LCD project has started • Linear Collider Detector for 500 GeV to 3 TeV . • A significant part of the LCD project concerns the • forward region and issues closely related to the beam • we get a lot of help from Daniel (and we need it!) • Too early to define “boundaries” – 12m, XXm, YYm • Active participation in, and work on, MDI issues • is part of our project plan • (KonradElsener, André Sailer, ...). SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 22

  23. spares SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 23

  24. Angular coverage of ILD forward calorimeters (THETA values given) IP SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 24

  25. CLIC detector (2) – ILD’ish Andre Sailer, CERN 3TeV GuineaPig 150’000 incoherent pairs (300’000 particles) -> 88% of 1 BX BG hits in the ILD tracking detectors color: indicates detector SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 25

  26. CLIC detector (2) – ILD’ish Andre Sailer, CERN 3TeV GuineaPig 150’000 incoherent pairs (300’000 particles) -> 88% of 1 BX Origin of BG hits in tracking detectors SLAC SiD workshop Konrad Elsener (CERN) K. Elsener - CLIC CTC meeting 26

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