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The CBM Time-of-Flight wall Ingo Deppner for the CBM-TOF Group - PowerPoint PPT Presentation

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DPG Frhjahrstagung 2018 The CBM Time-of-Flight wall Ingo Deppner for the CBM-TOF Group Physikalisches Institut der Uni. Heidelberg Outline: Introduction CBM-ToF requirements TDR ToF wall design Low resistive

  1. DPG – Frühjahrstagung 2018 The CBM Time-of-Flight wall Ingo Deppner for the CBM-TOF Group Physikalisches Institut der Uni. Heidelberg Outline: • Introduction • CBM-ToF requirements • TDR ToF wall design • Low resistive material and the BFTC • Test beam time at CERN and the MRPC1/2 prototype • Pre-mass production for MRPC3a/b counter • FAIR Phase 0 program • Summary Ingo Deppner DPG-Frühjahrstagung, Bochum, 1 26.02. - 02.03.2018

  2. Introduction Tracking acceptance: 2  <  Lab < 25   The Compressed Baryonic Matter Experiment  Free streaming DAQ ECAL Dipole TOF PSD  Software based event selection TRD  magnet R int = 10 MHz (Au + Au) RICH CBM overview talk: HK46.1 Group reports: 5 MUCH MVD & STS Short reports: 23 Poster: 5 1 ns Ingo Deppner DPG-Frühjahrstagung, Bochum, 2 26.02. - 02.03.2018

  3. Incident particle flux kHz/cm 2 URQMD simulated charged particle flux from Au + Au events for an interaction rate of 10 MHz • Flux ranging from 0.1 to 100 kHz/cm 2 • At different regions Time-of-Flight detectors kHz/cm 2 with different rate capabilities are needed Ingo Deppner DPG-Frühjahrstagung, Bochum, 3 26.02. - 02.03.2018

  4. Requirements Charged hadron identification is provided by Time-of-Flight (ToF) measurement CBM-ToF Requirements  Full system time resolution s T ~ 80 ps  Efficiency > 95 %  Rate capability  30 kHz/cm 2  Polar angular range 2.5° – 25°  Active area of 120 m 2 twisted twisted  Occupancy < 5 % RPC pair cabe pair cabe  Low power electronics feed through (~120.000 channels) gas box  Free streaming data acquisition Multi-gap Resistive Plate Chambers (MRPC) are the most suitable ToF detectors fulfilling our 120 W requirements 80 W 1 ns Ingo Deppner DPG-Frühjahrstagung, Bochum, 4 26.02. - 02.03.2018

  5. TDR ToF wall layout • 6 types of modules (M1 – M6) only • A module contains several MRPC counters • Region containing counters equipped with float glass • Region containing counters equipped with low resistive glass • Region containing counters equipped with ceramic material Ingo Deppner DPG-Frühjahrstagung, Bochum, 5 26.02. - 02.03.2018

  6. Ceramic RPCs for BFTC • start-time and the reaction-plane determination. • For CBM the use of RPC for the Beam Fragmentation T 0 Counter (BFT 0 C) with low resistive radiation hard ceramics electrodes and small chess-board like single cells is under consideration. 1 RPC 3 cells 1 cell 2 gaps 1 module 400 RPCs BFT 0 C = 8 modules Ingo Deppner DPG-Frühjahrstagung, Bochum, 6 26.02. - 02.03.2018

  7. Ceramic RPCs for BFTC RPC electrodes 4  10 9 Ω cm: most suitable resistivity order for application in CBM Ingo Deppner DPG-Frühjahrstagung, Bochum, 7 26.02. - 02.03.2018

  8. Resistive Glass Development Resistive glass for high-rate MRPCs is developed in Beijing, China Aging tests Raw resistive glass material for 400 m 2 Ingo Deppner DPG-Frühjahrstagung, Bochum, 8 26.02. - 02.03.2018

  9. TDR ToF wall layout high rate region Alternative solution with Pad-MRPCs is available Ingo Deppner DPG-Frühjahrstagung, Bochum, 9 26.02. - 02.03.2018

  10. Beam-time @ SPS in Nov. 2015 Beam-time @ SPS North Area in Nov. 2015 Beam: Lead @ 30A GeV Target: Lead 1 mm Intensity: 10 7 / spill Spill length: 8 s Rates: few 100 Hz/cm 2 - 1 kHz/cm 2 Energy close to SIS300 conditions Event display after calibration CBM TOF module Tracks Upper setup High multiplicity events RPC layers  = 3.5  Lower setup 20 MRPC RPC Hits About 1100 channels Ingo Deppner DPG-Frühjahrstagung, Bochum, 10 26.02. - 02.03.2018

  11. Beam-time @ SPS in Nov. 2015 Efficiency System time resolution MRPC1/2 prototype developed at Bucharest • Metal HV strip electrodes • Innovative method of impedance matching • Impedance independent of the granularity adjustable Beam time setup at CERN • Impedance tuned to 100 W • arXiv:1708.02707 Ingo Deppner DPG-Frühjahrstagung, Bochum, 11 26.02. - 02.03.2018

  12. TDR ToF wall layout intermediate rate region Module M5 250 0.7 10 Ingo Deppner DPG-Frühjahrstagung, Bochum, 12 26.02. - 02.03.2018

  13. TDR ToF wall layout low rate region Module M5 10 12 12 140 140 230 0.28 0.28 12 13 13 Ingo Deppner DPG-Frühjahrstagung, Bochum, 13 26.02. - 02.03.2018

  14. MRPC3a and MRPC3b mass production for eTOF MRPC3a mass prod at Nuctech, Beijing MRPC3b mass production at USTC/China ~55ps Ingo Deppner DPG-Frühjahrstagung, Bochum, 14 26.02. - 02.03.2018

  15. Module integration and cosmic test stand in HD DCS system (EPICS) Multi differential analysis of counter properties with cosmic tracks Online Monitor Single track Multi track cosmic event cosmic event Multiplicity 6 tracks About 100000 good tracks per day Ingo Deppner DPG-Frühjahrstagung, Bochum, 15 26.02. - 02.03.2018

  16. Cosmic results Hit distribution after calibration on the MRPC active area Efficiency Efficiency Efficiency Bulk efficiency > 95% Edge effects under investigation. Ingo Deppner DPG-Frühjahrstagung, Bochum, 16 26.02. - 02.03.2018

  17. Cosmic results Time resolution Time resolution about 55 ps Systematic errors under investigation See next talk by Phillip Weidenkaff Ingo Deppner DPG-Frühjahrstagung, Bochum, 17 26.02. - 02.03.2018

  18. Cosmic results Spatial resolution Residuals in X Residuals in Y Spatial resolution about 2.5 mm in X and 5.5 mm in Y Systematic errors under investigation. Ingo Deppner DPG-Frühjahrstagung, Bochum, 18 26.02. - 02.03.2018

  19. FAIR Phase 0 – eTOF@STAR Time line arXiv: 1609.05120  Jan 2018 shipping and installation of one sector  2 nd system integration test with one sector by Mar. 2018 participating in the Run18 beam time in STAR  Fall 2018 shipping all 33 modules including infrastructure (gas system, LV-, HV-power supply) to BNL  Fall 2018 Installation and commissioning  Feb 2019/2020 Start of the BES II campaign - 36 modules  Summer 2021 Decommissioning and shipping of all modules - 3 layers including infrastructure to FAIR - 12 sectors - 6912 channels First sector installed Ingo Deppner DPG-Frühjahrstagung, Bochum, 19 26.02. - 02.03.2018

  20. FAIR Phase 0 – miniCBM mTOF setup • 25 MRPC3a counters • 5 M4 modules + 10 CROB(GTBx) • Active area: 150 x 120 cm 2 • # of readout channels: 1600 • T0 diamond counter • Intended interaction rate: 10 MHz Milestones Counter production finished Dec. 2017 FEE ready Mar. 2018 Module production finished Mar. 2018 Module test with cosmics in HD Apr. - Jul. 2018 M4 module: 5 MRPC3a counters, 10 PADI, 2 Feed-through PCBs, 10 Get4, 2 Installation Jul. 2018 backplane PCBs (with GTBx) First beam time Aug 2018 Ingo Deppner DPG-Frühjahrstagung, Bochum, 20 26.02. - 02.03.2018

  21. Electronic readout chain Readout chain • PADI: Preamplifier board 32 ch • Feed through PCB CBM TOF module • GET4: TDC board 32 ch  TCA crate • Backplane with GBTx chip HP-PC • AFCK: FPGA board • FLIB: FPGA PCI express card Ingo Deppner DPG-Frühjahrstagung, Bochum, 21 26.02. - 02.03.2018

  22. Summary • Counters are fulfilling the specs • Innovative impedance matching solution developed • Preproduction for MRPC3/b counter started (QC, QA procedures initiated) • R&D for BFTC ongoing • Ultra high rate test still pending  miniCBM • FAIR phase 0 started - looking forward to physics • CBM TOF ready for beam in 2023 80 W 1 ns Ingo Deppner DPG-Frühjahrstagung, Bochum, 22 26.02. - 02.03.2018

  23. Thank you for your attention Contributing institutions: Special thanks go to: Tsinghua Beijing, Norbert Herrmann NIPNE Bucharest, GSI Darmstadt, IRI Frankfurt USTC Hefei, PI Heidelberg, ITEP Moscow, HZDR Rossendorf, CCNU Wuhan, Ingo Deppner DPG-Frühjahrstagung, Bochum, 23 26.02. - 02.03.2018

  24. Backup Backup Slides 80 W 1 ns Ingo Deppner DPG-Frühjahrstagung, Bochum, 24 26.02. - 02.03.2018

  25. Backup Slides CBM Physics topics  Deconfinement / phase transition at high ρ B  QCD critical endpoint  The equation-of- state at high ρ B  chiral symmetry restoration at high ρ B Observables  excitation function and flow of strangeness and charm  collective flow of hadrons D. Kresan Au + Au @ 25GeV p  particle production at threshold energies p K  excitation function of event-by-event fluctuations  excitation function of low-mass lepton connector pairs non twisted part  in-medium modifications of hadrons (ρ,ω,φ → e+e -(µ+µ-), D) Kaon acceptance depends critically on TOF resolution Ingo Deppner DPG-Frühjahrstagung, Bochum, 25 26.02. - 02.03.2018

  26. PID capability 80 W 1 ns Ingo Deppner DPG-Frühjahrstagung, Bochum, 26 26.02. - 02.03.2018

  27. Working principle of an RPC First Multi-gap RPC 1996 E. Cerron Zeballos et al., Nucl.Instrum.Meth. A374 (1996) 132-136 E. Cerron Zeballos et al., Nucl.Instrum.Meth. A374 (1996) 132-13 Time resolution: Efficiency:  : incident ch. particle flux,  : electrode bulk resistivity, d: electrode thickness How to increase the rate capability?   3x10 12 W cm   10 10 W cm E 0 = 120 kV/cm Ingo Deppner DPG-Frühjahrstagung, Bochum, 27 26.02. - 02.03.2018

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