TRD-2D weekly

Tuesday 31 Jan 2023, 09:00 → 12:30 Europe/Bucharest

Conference room Building A (DFH)

Alexandru Bercuci (IFIN-HH)

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

Meeting Access Information

• Meeting ID: 826 8725 7222

• Passcode: 723781

• Direct Link : https://us02web.zoom.us/j/82687257222

09:00 → 09:40 Hardware

09:00 Prototype testing

• mechanical structure
• read-out

Speakers: Laura Radulescu (IFIN-HH), Claudiu Schiaua (IFIN-HH/DFH)

09:20 Bonding machine

Speaker: Vasile Catanescu

09:40 → 10:20 Management

09:40 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

10:00 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

10:20 → 12:25 Data Analysis

Convener: Alexandru Bercuci (IFIN-HH)

10:25 TRD2D Addendum

• editing progress

Speaker: Alexandru Bercuci (IFIN-HH)

GitLab link

10:35 mCBM analysis

• Alignment updates

10:55 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.

 

11:05 Simulation of TRD frame

Speakers: Alexandru Bercuci (IFIN-HH), Laura Radulescu (IFIN-HH)

Simulation 1

Simulation 2

11:25 TRD inner frame

• supporting structures to be considered
• material budget estimations
• physics limitations

Speaker: Alexandru Bercuci (IFIN-HH)

Proposals

11:45 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

 

12:05 FEE dead channel masking

Speakers: Alexandru Bercuci (IFIN-HH), Claudiu Schiaua (IFIN-HH/DFH)

Redmine issue

12:15 NAF management

• System needs of the data analysis groups (CBM & ALICE)
• Timescales for implementation

Speaker: Alexandru Bercuci (IFIN-HH)