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09 September 2010 Erik Huemer (HEPHY Vienna) Upgrade of the CMS Tracker for High Luminosity Operation OEPG Jahrestagung 2010.

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Presentation on theme: "09 September 2010 Erik Huemer (HEPHY Vienna) Upgrade of the CMS Tracker for High Luminosity Operation OEPG Jahrestagung 2010."— Presentation transcript:

1 09 September 2010 Erik Huemer (HEPHY Vienna) Upgrade of the CMS Tracker for High Luminosity Operation OEPG Jahrestagung 2010

2 Upgrade of the CMS Tracker for High Luminosity Operation 2Erik Huemer (HEPHY Vienna)09 September 2010 Outline LHC Upgrade to explore Physics Potential Challenges for the CMS Tracker Required Advances in Technology R&D lines followed by HEPHY –Radiation Tolerant Sensors –Highly Integrated Sensors –p t Track-Trigger Modules Summary

3 Upgrade of the CMS Tracker for High Luminosity Operation LHC Upgrade to explore Physics Potential Operation until 2020 –Design luminosity: L = 10 34 cm -2 s -1 Continue physics programm –Increase in luminosity –ADVANTAGE: more statistics –Also disadvantages 3Erik Huemer (HEPHY Vienna)09 September 2010 2010 2012 2014 20162018 2020

4 Upgrade of the CMS Tracker for High Luminosity Operation LHC Upgrade to explore Physics Potential 4Erik Huemer (HEPHY Vienna)09 September 2010 The CMS tracker

5 Upgrade of the CMS Tracker for High Luminosity Operation 10 32 10 33 10 34 10 35 Track densities at different interaction rates Disadvantages: –Higher particle background –Higher radiation level –Higher track density LHC Upgrade to explore Physics Potential 5Erik Huemer (HEPHY Vienna)09 September 2010

6 Upgrade of the CMS Tracker for High Luminosity Operation Increase of radiation level Higher granularity to resolve dense packing of tracks Tracker needs to provide input to the trigger:  Track-Trigger on p t to enable selection of interesting events Amount of material in the tracker has to be minimized:  Interactions in the primary vertex  NOT with tracker material Challenges for the Tracker 6Erik Huemer (HEPHY Vienna)09 September 2010

7 Upgrade of the CMS Tracker for High Luminosity Operation Three R&D Lines R&D lines followed by HEPHY 1.Radiation Tolerant Sensors 2.Highly Intergrated Sensors 3.p T Track-Trigger Modules 7Erik Huemer (HEPHY Vienna)09 September 2010

8 Upgrade of the CMS Tracker for High Luminosity Operation 1. Radiation Tolerant Sensors 8Erik Huemer (HEPHY Vienna)09 September 2010 Important operating parameters which change with irradiation  Full Depletion Voltage (V FD )  Reverse Bias Current (Dark Current)  Charge Collection Efficiency (CCE) Silicon bulk materials and manufacturing processes  Float Zone (FZ) or Czochralski (CZ/MCZ) silicon  MCZ n-n sensors  FZ n-n sensors  MCZ n-p sensors  FZ n-p sensors  Thickness of the substrate

9 Upgrade of the CMS Tracker for High Luminosity Operation 2. Highly Integrated Sensors 9Erik Huemer (HEPHY Vienna)09 September 2010 Now: External pitch-adapter and readout-chips Future: Integrated pitch-adapter and on-sensor readout-chip  Reduces material  Higher flexibility  Handles granularity

10 Upgrade of the CMS Tracker for High Luminosity Operation 3. p t Track-Trigger Modules 10Erik Huemer (HEPHY Vienna)09 September 2010 ~200 μm Upper Sensor Lower Sensor Pass Fail ~100 μm ~1mm Fast measurement of momentum (P t ) for trigger decision  P t through measurement of track curvature  Track curvature through determination of contact angle on the tracker 2 parallel sensors with some mm space “Stiff” track with little curvature with high momentum only  Strips hit, only little dislocated  High P t Upper Sensor Lower Sensor

11 Upgrade of the CMS Tracker for High Luminosity Operation p t Track-Trigger Modules 11Erik Huemer (HEPHY Vienna)09 September 2010 Prototype @ CERN  Tested at various angles  Collected 1 TB of data Development analysis framework  Different geometry  Different read-out logic  Former analysis concepts do not work  Highly object oriented (C++, ROOT)  Quick exchange of single analysis parts

12 Upgrade of the CMS Tracker for High Luminosity Operation Summary 12Erik Huemer (HEPHY Vienna)09 September 2010 LHC upgrade crucial for future productivity CMS tracker has to be rebuilt Three R&D lines  Radiation hard materials under review  Highly integrated sensors built, tested, partially analysed  p T track-trigger modules built, tested, will be analysed with new software

13 Upgrade of the CMS Tracker for High Luminosity Operation 13Erik Huemer (HEPHY Vienna)09 September 2010

14 Upgrade of the CMS Tracker for High Luminosity Operation Backup Slides 14Erik Huemer (HEPHY Vienna)09 September 2010

15 Upgrade of the CMS Tracker for High Luminosity Operation Luminosity 15Erik Huemer (HEPHY Vienna)09 September 2010 Frequency of bunches Number of bunchesAmount of particles in a bunch Size of interaction area

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