Department of Semiconductor Detectors Thomas Bergauer HEPHY Scientific
Department of Semiconductor Detectors Thomas Bergauer HEPHY Scientific Advisory Board 21 Oct. 2010
Department of Semiconductor Detectors Mission Statement • Design, construction and testing of silicon sensors and detector modules • Operate the semiconductor laboratory (a. k. a. “clean room”) 21 Oct. 2010 Thomas Bergauer 2
Department of Semiconductor Detectors List of Members • Scientific (5 FTE): – Thomas Bergauer (Belle, CMS, ILC) • AIDA WP 9. 4 convener – Marko Dragicevic (CMS) • CEC convener – Michael Hoch (CERN, CMS) – Josef Hrubec (CMS) – Manfred Krammer (CMS) • • CMS Conference Committee Chair Austrian RECFA representative Students – Two Ph. D students: Manfred Valentan (Belle), Stephan Hänsel (ILC) – Three master students: Wolfgang Treberspurg, Maria Bernard-Schwarz (CMS), Erik Huemer (CMS) Technicians (0. 75 FTE): • Dieter Uhl (0. 25 FTE, technical college) • Margit Oberegger (0. 5 FTE) 21 Oct. 2010 Thomas Bergauer 3
Department of Semiconductor Detectors Present Activities • Construction of the Belle II Silicon Vertex Detector (SVD) – Double sided silicon sensors: design and negotiation with companies – Electrical characterization – Module assembly, beam tests, gamma-Irradiation • R&D for CMS Tracker Upgrade: CEC collaboration – – • New sensor design: strixel sensors New methods of connecting readout chip to sensor Neutron irradiation at Vienna nuclear reactor Development of radiation-hard silicon sensors with Austrian semiconductor company Silicon Detectors for an International Linear Collider experiment – Si. LC collaboration: Sensor Design, electrical characterization, testbeams – Associated member of EUDET, Full member of AIDA (start 2011) 21 Oct. 2010 Thomas Bergauer 4
Department of Semiconductor Detectors Expertise: Sensor Design • Sensor design – Design is programmed and automatically drawn – Self-programmed software framework • Collaboration with detector producers – Hamamatsu, Micron, ITE Warsaw • Microscopic and spectroscopic analysis to verify actual processed sensor – Collaboration with Center for Electron Microscopy at TU Vienna 21 Oct. 2010 Thomas Bergauer 5
Department of Semiconductor Detectors Expertise: Electrical Characterisation Available Setups: • Global IV, CV measurements • Fully automatic strip-by-strip measurements performed by motorized XYZ-table • Cold chuck to test at different temperatures 21 Oct. 2010 Goals are: • Quality assurance for mass production (e. g. CMS, soon Belle II) • Report back to producer • Select good sensors for module production Thomas Bergauer 6
Department of Semiconductor Detectors Expertise: Module Construction • Tasks to perform: • • Gluing, metrology, wire-bonding Modules for • • 21 Oct. 2010 CMS Tracker mass production Trapezoidal prototype modules for Belle II Thomas Bergauer 7
Department of Semiconductor Detectors Expertise: Beam Tests • Regular beam tests to test sensors and modules • Usually at CERNs SPS secondary beam lines • In cooperation with HEPHY electronics group and international colleagues (Si. LC, EUDET) • Different main goals: • 2008: resolution studies of sensors with different layout (ILC) • 2009: performance of double metal layers for routing purpose (CMS) • 2010: performance of double sided sensors with different p-stop patterns (Belle II) 21 Oct. 2010 Thomas Bergauer 8
Department of Semiconductor Detectors New Expertise: Neutron-Irradiation • Irradiation of silicon sensors at TRIGA Mark II nuclear reactor at ATI Vienna (“Atominstitut der TU Wien”) • Easy access • High neutron flux • Test of silicon sensors: • For CMS upgrade R&D • n- vs. p-type substrate • Float zone vs. m. Cz vs. Epitaxial material • First in-situ temperature measurement of nuclear reactor’s irradiation channels • Necessary to know for the understanding of the annealing behavior in silicon sensors 21 Oct. 2010 Thomas Bergauer 9
Department of Semiconductor Detectors New Expertise: Gamma-Irradiation • Irradiation of prototype Belle II modules at Co-60 source in Mol, Belgium • Test of • Silicon sensors • readout electronics, • voltage regulators, temp/humidity sensors • Joint effort of semiconductor/electronics department 21 Oct. 2010 Thomas Bergauer 10
Department of Semiconductor Detectors Expertise: Analysis • Baby sensors using 3 different inter-strip isolation layout on n-side 21 Oct. 2010 Thomas Bergauer 11
Department of Semiconductor Detectors Main Fields of Expertise: 2009 Double metal-layer Sensor Design 2009: Full cycle Electrical from design to Characterisation results completed within one year! Suggestions for Improvement: Modifications in Processing 21 Oct. 2010 Analysis Thomas Bergauer Module Construction Testbeam: 19 -31. August 2009 12
Department of Semiconductor Detectors Main Fields of Expertise: 2010 New Sensor Design for Belle II Electrical 2010: Full cycle from Characterisation design to results completed within one year again! Inter-strip isolation layout must be improved 21 Oct. 2010 New Modules Testbeam: 27. Sept to 11. Oct. 2010 Thomas Bergauer 13
Department of Semiconductor Detectors Timeline of Papers, Talks and Posters 18 16 Diploma/Ph. D theses 14 Presentations Papers 12 10 8 6 4 2 0 2003 21 Oct. 2010 2004 2005 2006 2007 2008 Thomas Bergauer 2009 2010 14
Department of Semiconductor Detectors Summary • Department of semiconductor detectors is fully integrated in research projects: – CMS Tracker construction, R&D for upgrade – Belle II: silicon sensors, modules, beam tests – Silicon Sensors for ILC • Close collaboration with electronics department since many developments are done together (e. g. module construction) • Good sharing of manpower: – Permanent staff carry expertise – Students for diploma/master and Ph. D theses 21 Oct. 2010 Thomas Bergauer 15
Department of Semiconductor Detectors 21 Oct. 2010 Thomas Bergauer Testbeam CERN 2009 Visit to Infineon Villach 2009 Tracker Integration 2007 Tak! Danke! Grazie! Thanks! 16
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