Marko Milovanović, ESR P3 – Radiation Hard Crystals / 3D Detectors Home country: Serbia, MSc in electrical engineering at the University of Nis (2007) Host institute: Jožef Stefan Institute, Ljubljana, Slovenia Supervisor: Gregor Kramberger PhD thesis: Electric field and charge multiplication in radiation damaged silicon detectors Thesis advisor and university: Marko Zavrtanik, Faculty of Electrical Engineering, University of Ljubljana September 20101MC-PAD Midterm Review

Scientific work Study of radiation damage as a function of type of radiation, radiation dose and annealing scenario. Measurements and analysis of various highly irradiated silicon strip/3D prototype sensors using Edge-TCT and Alibava readout system (LHC/HL-LHC speed electronics). Effects of various sets of operation parameters (radiation dose, annealing, temperature, bias, etc.) on detector performance (charge collection efficiency, noise, SNR, leakage current, etc.) September 20122MC-PAD Network Closing Event

Motivation Radiation damage – main limitation for successful operation of position sensitive silicon detectors used in LHC and foreseen HL-LHC upgrade. Numerous reports on charge multiplication effects observed in highly irradiated p-type strip detectors after long term annealing [Liverpool, UCSC, IJS] What happens inside the detector, where does this CM originate and how it affects the total charge collected? September 20123MC-PAD Network Closing Event I.Mandić, 2009

Edge-TCT (setup) September 20124MC-PAD Network Closing Event T=-20°C

Results HPK and Micron, FZ 300 μm, 5-10·10 15 n/cm 2 September 20125MC-PAD Network Closing Event Nearly 3x increase!

Results HPK, FZ 300 μm, 1·10 16 n/cm 2 September 20126MC-PAD Network Closing Event

Results HPK, FZ 300 μm, 1-2·10 15 n/cm 2 September 20127MC-PAD Network Closing Event Estimated V fd (denoted by line) 2270 V 3650 V

Results HPK, FZ 300 μm, 5-15·10 14 π/cm 2 September 20128MC-PAD Network Closing Event

Results MPP/HLL, FZ 150 μm, 5·10 15 n/cm 2 September 20129MC-PAD Network Closing Event Nearly 15x increase!

Results MPP/HLL, FZ 75 μm, 5·10 15 n/cm 2 September MC-PAD Network Closing Event 

Alibava setup & results HPK, FZ 300 μm, non-irr. & 1·10 16 n/cm 2 September MC-PAD Network Closing Event

Results HPK, FZ 300 μm, 1·10 16 n/cm 2 September MC-PAD Network Closing Event Bistable damage occurs in irradiated and long term annealed silicon detectors contributing to manifold increase in CC through CM mechanism (due to increase in N eff ), and decrease if the detector is kept under bias Operation at higher voltages preserves better SNR, due to larger CM contribution to CC than to noise. Bistable defects affect only CM.

Results HPK, FZ 300 μm, 1·10 16 n/cm 2 September MC-PAD Network Closing Event

Results CNM 3D Strip Detector, FZ 240 μm, 5·10 15 n/cm 2 September MC-PAD Network Closing Event n-type electrodes p-type electrodes Q x y y x [μm] [arb.] n-type electrodes p-type electrodes readout n-type electrodes unit cell y x [μm] [arb.]

Publications September MC-PAD Network Closing Event G. Kramberger, V. Cindro, I. Mandić, M. Mikuž, M. Milovanović, M. Zavrtanik, K. Žagar, “Investigation of irradiated silicon detectors by Edge-TCT”, IEEE Trans. Nucl. Sci. 57 (2010) G. Kramberger, V. Cindro, I. Mandić, M.Mikuž, M. Milovanović, M. Zavrtanik, “Annealing studies of irradiated p-type silicon sensors by EDGE-TCT”, PoS (Vertex 2010) 021. I. Mandić, V. Cindro, A. Gorišek, G. Kramberger, M. Mikuž, M. Milovanović and M. Zavrtanik, “Accelerated annealing of n+-p strip detectors irradiated with pions”, 2011 JINST 6 P M. Milovanović, G. Kramberger, I. Mandić, V. Cindro, M. Mikuž, M. Zavrtanik, “Effects of accelerated long term annealing in highly irradiated n+-p strip detector examined by Edge-TCT”, 2012 JINST 7 P M. Milovanović, G. Kramberger, I. Mandić, V. Cindro, M. Mikuž, M. Zavrtanik, G. Stewart, “Position resolved multi channel transient current technique”, Facta Universitatis, Series: Automatic control and Robotics, Vol. 11, No.1, 2012, pp G. Stewart, R. Bates, C. Fleta, G. Kramberger, M. Lozno, M. Milovanović, G. Pellegrini, “Analysis of edge and surface TCTs for irradiated 3D silicon strip detectors”, (to be submitted in JINST 2012).

Presentations September MC-PAD Network Closing Event “Electric field and charge multiplication in highly irradiated silicon detectors”, Unraveling the Mysteries at the LHC, SLAC National Accelerator Laboratory, Menlo Park, California, USA (2012) – Poster presentation “Edge-TCT studies of heavily irradiated strip detectors“, 7th Trento Workshop on Advanced Silicon Radiation Detectors, JSI, Ljubljana, SLO (2012) - Presentation “Effects of long term annealing in p-type strip detectors irradiated with neutrons to Φ=1·10 16 cm -2, investigated by Edge-TCT “, 19th RD50 Workshop, CERN, Geneva, CH (2011) - Presentation “Edge-TCT and Alibava measurements with pion and neutron irradiated micro-strip detectors”, 18th RD50 Workshop, Liverpool, UK (2011) – Presentation “Electric field and charge multiplication in radiation damaged silicon detectors “, PhD Thesis Proposal – Faculty of Electrical Engineering, University of Ljubljana (2012) EDIT Excellence in Detectors and Instrumentation Technologies, CERN, Geneva, CH (2011) – Tutor on Hands-on “Silicon Strip Detectors” Seminars/reports on research work at the Faculty of Electrical Engineering, University of Ljubljana ( ) “Annealing studies of a heavily irradiated silicon micro strip detector investigated using Edge-TCT “, 15th RD50 Workshop, CERN, Geneva CH (2009) - Presentation

Training September MC-PAD Network Closing Event Network Training Events Heavy Ions and Calorimetry in High Energy Physics, Darmstadt, DE (2012) CV writing and Interview skills, PSI, Villigen, CH (2011) Micro-pattern gas photo-detectors, CERN, Geneva, CH (2011) Processing and Radiation Hardness of Solid state detectors, JSI, Ljubljana, SI (2010) Detector simulation and data analysis, DESY, Hamburg, DE (2010) Readout electronics, AGF/IFJ-PAN, Krakow, PL (2009) Other trainings/events Unraveling the Mysteries at the LHC, SLAC National Accelerator Laboratory, Menlo Park, California, USA (2012) 7th Trento Workshop on Advanced Silicon Radiation Detectors, JSI, Ljubljana, SLO (2012) 19th RD50 Workshop, CERN, Geneva, CH (2011) 18th RD50 Workshop, Liverpool, UK (2011) EDIT Excellence in Detectors and Instrumentation Technologies, CERN, Geneva, CH (2011) RESMDD10 Conference, Semiconductor detectors for Medical application, Florence, IT (2010) 15th RD50 Workshop, CERN, Geneva CH (2009)

Personal evolution/plans September MC-PAD Network Closing Event Impact on me: Advanced training, experience, virtually endless opportunities Networking Social impact Network Training Events Excellent symbiosis of both educational and social stances. Science and affiliation Highly relevant research/papers on detector performance under extreme radiation influence, with newly developed tools/setups for further study. Downside Almost no contact with industry Plans for the future A touch of industrial sector for a change?...

Summary?.. September MC-PAD Network Closing Event Thank you, MC-PAD!