Project group CMS - Inner Tracker HEPHY Scientific Advisory Board October 21, 2010 Josef Hrubec

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 The CMS Tracker 2 The Inner Tracker of the CMS experiment is the innermost subdetector system to measure the tracks of charged particles. It is composed of –a Silicon Pixel Detector surrounding the collision region, and –a Silicon Strip Tracker extending to a radius of about 1.2 m. in December 2007in Spring 2009

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Map of functioning channels 3  TIB: 96.25%  TID: 99.5%  TOB: 98.33%  TEC+ 98.8%  TEC % Silicon Strip Tracker : 98.1% working channels.

Project group CMS - Inner Tracker Josef HrubecOctober 21, Understanding the Tracker Performance η distribution ϕ distribution 100% -

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Mission Statement 5 The project group “CMS - Inner Tracker” (member of the CMS collaboration since 1994) combines the expert knowledge of the institute for a significant contribution to the CMS Tracker. –Design and Construction of the CMS Tracker –Exploitation of the Tracker to extract the physics results –Significant contributions to the planned upgrade programmes for the CMS Tracker The following departments contribute their expertise to the project: Algorithm and Software Development Semiconductor Detectors Electronics Machine shop

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 List of Members 6 Physicists and academic engineers: W. Adam, G. Auzinger 1, T. Bergauer, M. Bernard-Schwarz 1, M. Dragicevic 2, M. Friedl, R. Frühwirth, S. Hänsel 2, M. Hoch, E. Huemer 1, J. Hrubec, W. Kiesenhofer 1, M. Krammer, M. Pernicka 3, W. Waltenberger, E. Widl Technical staff: M. Oberegger, M. Oderits, J. Pirker, S. Schmid, R. Stark, H. Steininger, D. Uhl 1 Diploma thesis, 2 PhD thesis, 3 retired Many of the colleagues contribute as well to other projects of our institute.

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Present Activities 7 Work during the shut-down during winter 2009/2010: –Improvements in the monitoring system for environmental parameters (temperature, humidity, pressure) –Continued work in the Tracker Slow Control and Safety System LHC collisions at 7 TeV since March 30, 2010 –Shift work during operation, maintenance of equipment –Coordinator for the Tracker Power System (high & low voltage)

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Electronics 8 Maintenance of modules: Opto-Hybrids, Pixel - Front End Driver Production of additional 16 Pixel-FED modules (spares) Regular updates of Pixel-FED firmware –to overcome problems like peaks in data volume (“PKAM” events) caused by tracks parallel to beam axis –to prepare for the Heavy Ion collision runs

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Ageing of the Tracker 9 Extraction of the time history for critical parameters of the silicon modules in order to understand their behaviour under the irradiation conditions at LHC in view of a future Tracker upgrade for the “High Luminosity – LHC” To monitor the ageing of the silicon sensors: Measure the Reverse Bias Current at operating voltage – expected to increase to about 150 µA in ~10 years LHC collisions Measure the Depletion Voltage – varying the operating voltage – from signals induced by particles – from noise measurements A first set of initial measurements taken in August 2010

Project group CMS - Inner Tracker Josef HrubecOctober 21, Signal versus Bias measurement For the Tracker Inner Barrel Reference measurements recorded at the – Module assembly centres – Manufacturers The non-uniformity in the distribution of Vfd is expected and arises from the sensor selection for different layers of the detector

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Activities in Software 11 Maintenance of the algorithms and of the programme parts developed at the institute and integrated in the CMS software – for track reconstruction – for electron reconstruction – for vertex reconstruction Contributions to the physics analysis group Kalman Algorithm for alignment of the Tracker (PhD thesis) – Starting point: parameters from “cosmic muon data” – Longer absence of the relevant colleague – Verification with proton-proton collisions

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Upgrades of the Tracker 12 Following the LHC plans to increase the luminosity – First shutdown in 2012 LHC: nominal energy, nominal luminosity cm -1 s -1 – Second shutdown in 2016 ––> CMS Upgrade Phase 1 Luminosity ~2.3 × cm -1 s -1 CMS Technical Proposal in preparation New Pixel-detector – Third shutdown in 2020 or later ––> CMS Upgrade Phase 2 “High Luminosity – LHC”, Luminosity ~5 × cm -1 s -1 CMS: Appendix to the Technical Proposal Research and development programme

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Phase 1 New Pixel Detector (2016) 13 New daughter board (instead of 3 ADC cards) New optical receiver (Zarlink) Modification of Pixel-FED (Hephy)

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 CMS Tracker for Phase 2 14 Development of a New Tracking System for CMS Studies for the OUTER LAYERS Proposal “for an R&D project to develop materials, technologies and simulations for silicon sensor modules at intermediate to large radii of a new CMS tracker for SLHC.” (Central European Consortium: RWTH Aachen, CNM Barcelona, DESY-Zeuthen, IFCA Santander, ITE Warschau, University of Hamburg, Universität Karlsruhe, Louvain, Vienna-Hephy, Vilnius University) We will contribute with: –sensor designs, designs of test structures –module designs to reduce the material budget –routing schemes to connect readout chips to sensors –appropriate tests, test beam experiments [Group member proposed as coordinator of the consortium] Proposal “R&D for Thin Single-Sided Sensors with HPK“ Our test structures are included on the wafers

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Submission to Hamamatsu (HPK) 15 Production of thin sensors Design of several test structures and sensors (Karlsruhe, Hephy) Different materials / processing methods First 54 wafers delivered Hephy has global responsibility for all test structures, and for all double metal structures and sensors Electrical characterisation at the institute Structures / sensors will be irradiated

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Level-1 Track Trigger 16 Studies for TRIGGER LAYERS Tracker must deliver information to the level 1 trigger Proposal “Prototyping stacked modules for the L1 track trigger” (Aachen, Bristol, CERN, Brunel, Cornell, DESY, Imperial, Padova, Perugia, Torino, Karlsruhe, Lyon, Rice, Rutherford, Strasbourg, U.C. Santa Barbara, Vienna-Hephy), in the approval process We will contribute to: –Off-detector electronics –Sensor –Module development Test beam data from 2009 / 2010 with a home made prototype under analysis (diploma thesis)

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Positions of Group Members 17 CMS collaboration: M. Krammer: Chairperson of the CMS Conference Committee Member of the CMS collaboration board Member of the CMS management board CMS Tracker collaboration: M. Dragicevic: proposed as Coordinator of the CEC consortium M. Hoch: Coordinator for the Tracker power system CMS Physics organisation: W. Adam: Coordinator for b-tagging

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Publications (2010) 18 –23 CMS papers (from CRAFT 2008 data) published in JINST 5 (2010) 3 of them are Tracker related papers – Physics Analysis Summaries and Papers TRK Tracking Performance Results from early LHC Operation in publication in JHEPC Tracking/b-tagging Physics Analysis Summaries TRK Measurement of Tracking Efficiency TRK Studies of Tracker Material TRK Measurement of Momentum Scale TRK Tracking and Primary Vertex Results in first 7 TeV Collisions BTV Commissioning of b-jet identification with pp collisions at sqrt(s) = 7TeV Discussing a plan jointly with TK Pub Committee, DPG, POGs and Physics for publishing to Journals more performance related papers – Several conference contributions: see department presentation – Editing of the proceedings for the Vienna Conference on Instrumentation 2010

Project group CMS - Inner Tracker Josef HrubecOctober 21, 2010 Future Plans 19 Continuation of our contributions to the operation of the Tracker and of the CMS experiment Contribution to the data analysis –Tracker specific performance studies –Tracker specific analysis software –Work in close contact to physics analysis Maintenance of hardware, electronics and software Upgrade of the Pixel – Front End Driver R&D for a Tracker upgrade in view of an upgraded CMS detector at the “High Luminosity – LHC” from 2020 onwards

Project group CMS - Inner Tracker Josef HrubecOctober 21, THANK YOU for your attention !