1 J.M. Heuser − Status of the Silicon Tracking System Johann M. Heuser CBM Collaboration Meeting GSI Darmstadt, 12 March 2009 Status of the CBM Silicon Tracking System Project

2 J.M. Heuser − Status of the Silicon Tracking System STS Workgroup Meeting Simulation studies of a realistic STS Results from first in-beam test Preparation of next beam tests R&D: detectors, module demonstrators Project planning... canceled

3 J.M. Heuser − Status of the Silicon Tracking System Towards a realistic STS in the simulations

4 J.M. Heuser − Status of the Silicon Tracking System overlaps gaps A. Kotynia

5 J.M. Heuser − Status of the Silicon Tracking System ADC value is proportional to charge collected by each strip applied to both sides of the double-sided strip detectors... and used for hit finding...

6 J.M. Heuser − Status of the Silicon Tracking System

7 all: %91.13 % vertex: %93.26 % ref.: %92.88 % non-vtx: %70.81 % track reconstruction efficiency stereo angle: 15 deg  7.5 deg momentum resolution 1.36 %1.43 % stereo angle: 15 deg  7.5 deg

8 J.M. Heuser − Status of the Silicon Tracking System Cluster formation of activated strips & hit finding all: % % vertex: % % ref.: % % non-vtx: % % track reconstruction efficiency stereo angle: 15 deg  7.5 deg 1.36 % 1.43 % stereo angle: 15 deg  7.5 deg momentum resolution

9 J.M. Heuser − Status of the Silicon Tracking System Ideal reconstruction: sts_reco.C Real reconstruction: sts_reco_real.C Real + Ideal response source: svn co Geometry file: sts_Standard_s3055AAFK5.SecD.geo Parameters file: sts_Standard_s3055AAFK5.SecD.digi.par sts_Standard_s3055AAFK5.SecD.7vs7.digi.par Make available in next release: USE IT. It's the best realistic detector description we have so far. Developments in trunk: ● Calculating spatial resolution for real detector response functions; ● Improving hit finding method for clusters; ● Analysing data from test beam in September 2008 – compare results with simulations Code in the repository Next steps

10 J.M. Heuser − Status of the Silicon Tracking System First in-beam experiments GSI: Test beam line with 2.5 GeV protons CBM pre-prototype detector systems with free-streaming read-out electronics 2 double-sided silicon microstrip detectors Front-end board with self-triggering n-XYTER chip Readout controller DAQ online/offline analysis (FAIRroot) online/offline analysis SVD-2 DAQ Readout board with Gassiplex chips 1 tracking station with a double-sided silicon microstrip detector IHEP: SVD-2 experiment, 50 GeV protons CBM demonstrator tracking station operated in the SVD-2 beam tracker

11 J.M. Heuser − Status of the Silicon Tracking System Results from the Silicon detectors [strips] correlation of fired strips vertical- vertical horizontal- horizontal ADC front side ADC back side detector hits cluster size cluster charge front-back track residuals X [mm] rms 15.3  m rms 14.8  m track residuals Y [mm] spatial resolution tracking efficiency ~ 100% corresponds to 50  m strip pitch/  12

12 J.M. Heuser − Status of the Silicon Tracking System T. Dutta, A. Kotynia

13 J.M. Heuser − Status of the Silicon Tracking System Analysis of analog signals cluster size distribution of fired strips per particle ADC charge for 3 and 4-strip clusters as expected... total charge... n-XYTER behaviour not yet sufficiently understood T. Dutta, A. Kotynia

14 J.M. Heuser − Status of the Silicon Tracking System DAQ chain works again At our disposal: 2 ROCs 1 FEB1 cable 2 test boards with same sensors as during test beam reproduce hot channels, noise, analog detector response etc. with laser, radioactive source, compare with test beam data Recreate test beam setup in the lab A. Lymanets

15 J.M. Heuser − Status of the Silicon Tracking System 2008: when: September where: cave C, beamline HTD duration:3 shifts à 4 hours parasitic beam: protons: 2.5 GeV intensity: 10 4 – 10 8 /s tested systems: Silicon Tracking System (STS) Gas Electron Multipliers (GEM) Single-event upsets in electronics (FPGA) 2009: when: (June) (August/September) where: cave C, beamline HTD duration:10 shifts à 4 hours, max. 4 hours/day parasitic beam: protons: 2.5 GeV intensity: 10 4 – 10 8 /s systems to be tested: Silicon Tracking System (STS) Gas Electron Multipliers (GEM) Ring Imaging Cherenkov (RICH) Transition Radiation Detectors (TRD) Resistive Plate Chambers (RPC) Single-event upsets in electronics (FPGA) Datennahmesystem (DAQ) Beam tests 2008 — 2009 at GSI + runs at IHEP Protvino

16 J.M. Heuser − Status of the Silicon Tracking System reference tracking telescope with 3 or 4 stations Preparation of next in-beam tests at GSI n-XYTER Quattro boards with 4 n-XYTER chips fully reading out one CBM baby detector C. Schmidt et al.

17 J.M. Heuser − Status of the Silicon Tracking System in spite of bonding difficulties, managed to realize: including Complex Mulitlayer Data Chain + tools, manuals to be used for tests at GSI and abroad

18 J.M. Heuser − Status of the Silicon Tracking System Development of the STS front-end board GSI project Task: Important for the demonstrator development in the CBM-MPD-STS Consortium Approach: Technology from IMEC, Belgium. Design of a first demonstrator, e.g. 4 n-XYTER chips on Si-Cu substrate V. Kleipa

19 J.M. Heuser − Status of the Silicon Tracking System CBM01B1, CBM01B2 as well as CBM01 sensors laser pulses (640 nm) and radioactive sources. IV - CBM01 Laser pulse amplitude at n-side strips as a function of the applied voltage (irradiation from the n-side). Interstrip charge collection with Ra-226, 4 lines – alpha-source. Silicon detector R&D: E.g. investigation of CBM01 detectors V. Pugatch, KINR

20 J.M. Heuser − Status of the Silicon Tracking System 1) Successor to full-size prototype CBM01 combined with: novel systematic 2D/3D device and process simulations (ISE-TCAD/Synopsis) irradiation tests 4" wafer, 285 µm Si 2) Successor to CBM02: rad tolerant designs main detector 15° stereo angle 50  m strip pitch 90° test detectors Two submissions planned 2009: 60  60(40) mm 1024 strips/side 58  m pitch  7.5 deg stereo angle double metal on 2 sides pin-compatible to MSU prototype under design/production Silicon Detector R&D GSI — CiS Erfurt

21 J.M. Heuser − Status of the Silicon Tracking System With Helsinki Institute of Physics, Finland / CERN / RD50: project for 2009 With Helsinki Institute of Physics, Finland / CERN / RD50: project for 2009 Thin radiation hard single-sided microstrip detectors: CBM test structures on 150 (300)  m n-type MCz material Silicon Detector R&D GSI — Finland 128 strips, 100 µm pitch 128 strips, 50 µm pitch 128 strips, 25 µm pitch 1) Rad-hard single-sided CBM Baby detector 1) Demonstrator for an intermediate station between STS and MVD

22 J.M. Heuser − Status of the Silicon Tracking System Irradiation studies of Si test structures... beginning systematic activity at GSI and KRI St. Petersburg fluence: 3  MeV n eq cm -2 GSI: A. Lymanets

23 J.M. Heuser − Status of the Silicon Tracking System Development of radiation hard double-sided Si microstrip detectors: Simulation approach  Acquiring "Advanced TCAD Bundle: Start of a new, systematic activity:  Tool: detailed simulation and optimization of semiconductor properties detector design detector processing (doping, junctions, charge collection, operation under CBM irradiation scenario) S. Chatterji

24 J.M. Heuser − Status of the Silicon Tracking System Dubna GSI, Protvino, Dubna Dubna, Protvino Kharkov St.Petersburg 7 institutes 3 countries Modules assembly Components Ladder assembly Radiation tests In-beam tests GOAL:to organize an East Slavic cluster of teams for production of the CBM and MPD STS The CBM-MPD STS Consortium Y. Murin

25 J.M. Heuser − Status of the Silicon Tracking System Consortium 2009 Tasks and their sharing  Demonstrator 1: A 3-sensor module prototype  Organization of in-beam tests in Protvino, November, 2009  Formulating irradiation plan for KRI Cyclotron team for 2009  Testing bench with collimated Ru-106 JINR to operate with n-XYTER FEB read-out  Production of CF parts for the full ladder prototype  Cooling system definition work plan (additional funds application)  Analogue long cable conceptual bench tests based on FEB and existing Demonstrator-0B and n-XYTER FEBs  Attraction of new members (Czech Republic, sensor production?)

26 J.M. Heuser − Status of the Silicon Tracking System Summary Progress with detailed STS description in CbmRoot realistic sensor arrangement, overlaps, gaps, detector response... use it for CBM feasibility studies Milestones: Results from first in-beam experiments demonstrate technical validity, feasibility very important to calibrate our simulations Prototyping and development of demonstrators must be continued with highest priority detectors, module structures, electronics, system prototypes Serious engineering for the development of the "target region" STS + MVD + beam pipe + magnet Technical Design Report in 2012