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TRD-2D weekly

→ Europe/Bucharest
Conference room Building A (DFH)

Conference room Building A

DFH
Alexandru Bercuci (IFIN-HH)
Description

  Weekly reports on local activities done for the TRD-2D project of the CBM collaboration.

Meeting Access Information

Contact
    • Hardware
      • 1
        Prototype testing
        • mechanical structure
        • read-out
        Speakers: Laura Radulescu (IFIN-HH), Claudiu Schiaua (IFIN-HH/DFH)
      • 2
        Bonding machine
        Speaker: Vasile Catanescu
    • Management
      • 3
        PS participation
        • constructing input PID references for CBM
        • target date
        • target infrastructure (detectors/FEE)
        Speaker: Prof. Mihai Petrovici (National Institute for Physics and Nuclear Engineering (IFIN-HH))
        sim_3gev_prelim.pdf
        spectra3gev_pions.pdf
        trd-geant-rendering.png

        MAIN SLIDE 

        (possible pic: trd-geant-rendering.png) 
        - the TRD subsystem contributes significantly to the electron ID of CBM 
        - four detector layers, PE foam-based radiators and MWPCs 
        - comparatively soft TR spectrum ensures a high TR yield, combined with optimised (thin) entrance region of the MWPCs 

        Foreseen activity: 
        - beamtime application at PS 
         . mixed beam (e, π, μ), range of about 2 to 5 GeV (PS T9?) 
         . 2 or 3 layers of TRD (~ 1 m^2 detectors) 
           plus PID reference, e.g. Pb glass calorimeter 
           OR 
           pure e and π beams subsequently, if purity confirmed 
         . position reference, Si strip detectors (optionally) 
         . readout with CBM DAQ, to be installed on site 
         . periph. systems, i.e. LV, HV and gas on site 
        - motivation: measurement of e and π with detectors from series production and final read-out electronics as PID reference 


        BACKUP SLIDE 

        spectra3gev_pions.pdf 
        Caption: Energy loss spectra of electrons and pions, at 3 GeV, different radiator sizes. Electrons recorded with prototype TRD modules at DESY, pions simulated/approximated. 

        Optionally, simulation aside: sim_3gev_prelim.pdf 
        Caption: Energy loss spectra of electrons, 3 GeV, simulation (Adrian Meyer-Ahrens). 

        - Calibration of PID methods, as e.g. likelihood 
        - Reference spectra to be recorded for e and π, to be done for series TRD modules, with final read-out electronics 
        - Tune radiator simulation to data 
        - Simulation settings: 
         . No of transitions as in Tab. 1 
         . Foil width (average): 12 µm 
         . Gad width (average): 900 µm 
         . Foil plasma frequency: 20.64 eV 
         . Air plasma frequency: 0.7 eV 

        Tab. 1: 
        Radiator Width (cm);    Transitions 
            31.5    ;    337 
            26.5    ;    281 
            21.5    ;    227 
            16.5    ;    172 
            11.5    ;    117 
            1.5    ;    15 

        END

      • 4
        Milestone tracker for TRD @ CBM
        • preparation for TRD group meeting
        Speakers: Alexandru Bercuci (IFIN-HH), Prof. Mihai Petrovici (National Institute for Physics and Nuclear Engineering (IFIN-HH))
        Milestone tracker_17012023.pptx

        Dear All, 

        the CBM rebaselining 2023 is ongoing, i.e. milestones and the project plan is updated to the current perspectives, and of course also the TRD plans are to be revised as part of this process. TC and the overall situation are asking us to ensure a new level of reliability. Should not be too solemn wording now, but seems, for own interest, we shall stick to the dates we are tagging. 

        As a large system, luckily we have a comparatively low number of milestones in direct connection with the overall project plan. Connected are, e.g., the mechanics of the TRD mainframe to the subframe and the pipes plus (LV + HV) cables in the service shaft. 

        Please find attached, the milestones which are to be scheduled. Some points have strong interconnection between our institutes, as mainframe and radiator and gas system. Propose to exchange in a meeting. We could dedicate Wed 01. Feb 14:00 (GSI), in this round. If it does not fit, kindly ask to reply with alternative suggests, think this is most efficient. Seeing forward to your replies. 

        Best regards 
        Philipp

        TRD2D FEB/FEE development 

        • FEB test - end Mar design done. 
        • FASP prod - end Mar
        • FASP bonding/test - CERN. end Apr (FASP-PCB check Claudiu)
        • FASP packing - end May
        • FEB test - end May done and usable
        • ADC 8ch 14$/pc. end Apr ordered
        • FEB (FASP-FEB, CLK-FEB, OPTIC -FEB) : design end Aug
        • FEB (FASP-FEB, CLK-FEB, OPTIC -FEB) : ready end Oct.
        • TRY to equip 2 TRD2D (2012 + 2022) to be installed at mCBM
    • Data Analysis
      Convener: Alexandru Bercuci (IFIN-HH)
      • 5
        TRD2D Addendum
        • editing progress
        Speaker: Alexandru Bercuci (IFIN-HH)
        GitLab link
      • 6
        mCBM analysis
        • Alignment updates
      • 7
        TRD layer spacing
        • analyze the impact of layer spacing on the tracking efficiency
        • costs ?!
        Speaker: Alexandru Bercuci (IFIN-HH)

        Hi Adrian,

        According to the discussion from our last meeting I attach here the geometry creation macro for the cases :

        1. 71 cm layer spacing; 30 cm radiator thickness
        2. 66 cm layer spacing; 25 cm radiator thickness
        3. 61 cm layer spacing; 20 cm radiator thickness

        each time the geometry name is the same i.e. 18b_1e so that there is no need to change any other configuration file (geom setup, params, etc). Pls let me know if this is enough to run some simulations + digitization to asses the influence of layer spacing on tracking efficiency. Please feel free to put this task wherever you think on your todo list. I don't want to impede on your more urgent tasks

        Alex
        =====================================================================================


        Hi Alex,

        I made a quick test run over 10 Events, it finished successfully but in the digitization there are a lot of warnings like:
        "[WARN] TrdSimT8453::FlushBuffer: FASP Calibration for ro_ch 1221 in module 8453 missing.
          [WARN] TrdSimT8453::FlushBuffer: FASP Calibration for ro_ch 1223 in module 8453 missing.
          [WARN] TrdSimT8469::FlushBuffer: FASP Calibration for ro_ch 47 in module 8469 missing."

        Can this be ignored?
        I also attached the output raw.root file if you want to have a look. If you say that this is ok, then I would start simulations with more events.

         

      • 8
        Simulation of TRD frame
        Speakers: Alexandru Bercuci (IFIN-HH), Laura Radulescu (IFIN-HH)
        Simulation 1
        Simulation 2
      • 9
        TRD inner frame
        • supporting structures to be considered
        • material budget estimations
        • physics limitations
        Speaker: Alexandru Bercuci (IFIN-HH)
        Proposals
      • 10
        Preparing the CBM software for mass production
        • calibration discussions
        • the parameters to be monitored
        • live hands-on meeting to be decided
        Speaker: Alexandru Bercuci (IFIN-HH)
        • Discussed so far only during the TRD weekly meetings
        • Tentative meeting : couple of days close to the next Collaboration Meeting

         

      • 11
        FEE dead channel masking
        Speakers: Alexandru Bercuci (IFIN-HH), Claudiu Schiaua (IFIN-HH/DFH)
        Redmine issue
      • 12
        NAF management
        • System needs of the data analysis groups (CBM & ALICE)
        • Timescales for implementation
        Speaker: Alexandru Bercuci (IFIN-HH)
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