Gas systems R&D activities

Wednesday 16 Aug 2023, 09:30 → 14:35 Europe/Zurich

20/1-004 (CERN)

Beatrice Mandelli (CERN)

Live link: https://crimson-cheetah-2d3.notion.site/GCS-R-D-Activities-16-08-2023-7bae502942554316b796da891c33b80b?pvs=4

 

GCS R&D Activities 16/08/2023

R&D activities

LAB256

Done

[x] Scintillators conicidence: Test combinations of scintillators and report counting rates:

https://elogepdt-rdgas.web.cern.ch/RPC/678

https://elogepdt-rdgas.web.cern.ch/RPC/679

[x] Elog to be updated: status of chambers in lab: latest eff curve plots

https://elogepdt-rdgas.web.cern.ch/RPC/677

https://elogepdt-rdgas.web.cern.ch/RPC/682

[x] Update the DB with the state of the chambers

https://ep-dt-rpc-db.app.cern.ch/admin/content/rpcs

[x] Update resistivity in DB

https://ep-dt-rpc-db.app.cern.ch/admin/content/resistivities

TODO

[ ] To check if they were properly conditioned and where is the data from the conditioning in the elog and in grafana

[ ] RPC 18 to test it in a frame with 2.5 cm strips

[ ] Which chamber is performing best

• RPC 13 nice efficiency curves but higher currents and not very stable → conditioning?
• RPC 15 high streamers, good currents, high time resolution → dark counts, electronics?
• RPC 18 Low efficiency, rest is okay, extremely wrong time resolution → electronics?
• RPC 23 slightly higher currents → conditioning?

[ ] Tests to be performed on switching trigger between digitizer to see if time resolution changes

[ ] Use on the GIF++ scintillators as the bottom one to see if triple coincidence count is improving

[ ] Fitting function of time distribution to understand what happens to RPC 6 and RPC 18 in the past scans

[ ] Gases available to test: which and how to use them

• [ ] Test one of the HFCs like in Beatrice presentation: https://indico.cern.ch/event/716539/contributions/3245961/attachments/1799631/2934884/VCI19_BMandelli.pdf (slide 9)

904

Done

• [x] Check for installation of Vaisala for readout
• [x] Check for installation of mass flowmeter

TODO

• [ ] Table of experimental parameters to be prepared by Uzay and to be regularly updated in the elog
• [ ] Finalize tests with 10%, 7% CF4 and compare the results
  • [ ] Check results together before doing any physical intervention in the setup
• [ ] Compare first with second set of measurement with the first set for 10% of CF4
• [ ] Try to fit the data without initial baseline point and compare total rate with single rate
• [ ] Check with Uzay and Arystan for installation of HF and F2 cells
• [ ] Arystan and Uzay comparison of different analysis algorithms to get the production rate and understand if it is constant over time

GIF++

Done

TODO

• [ ] Final plots to be discussed and prepared to understand the status of the aging tests
  • [ ] Ohmic currents vs integrated charge
  • [ ] Physics currents vs integrated charge
  • [ ] Ohmic currents vs time
  • [ ] Physics currents vs time
  • [ ] Muon beam efficiencies for same gas mixture at different test beam (legend to report the integrated charge)
  • [ ] Currents vs rate for the same gas mixture and different test beams (legend to report the integrated charge)
  • [ ] Resistivity vs time
  • [ ] Currents vs voltage for the source off scans (legend to report integrated charge)
• [ ] Prepare a weekly report of the plots on a static webpage in https://ghg-studies-eos.web.cern.ch/ghg-studies-eos/ + elog
• [ ] Tests GC in the elog → elog missing
• [ ] Resume daily GIF++ checklist
• [ ] Understand if there is a difference on runs performed on wed. (morning and afternoon)
• [ ] Test beam preparation
  • [ ] To prepare 3 chambers from the lab: 15, 18, 23
  • [ ] Test RPC 19, 21, 24 in 600 Hz trolley with STD and CO2 30% 1% SF6
  • [ ] Replace all the chambers with the ones in the lab:
    • [ ] Test STD, 30% CO2 1% SF6
    • [ ] Possibly test Novec + 30% CO2
• [ ] Cabling campaign: in November
• [ ] O2 cells ordered

Software

• [ ] Organize the required work for a possible rewrite of the backend of olefin
  • [ ] Understand how to organize gitlab
• [ ] Organize the storage of the data in a new dataframe
  • [ ] For muon signals
  • [ ] For gamma signals
• [ ] Signal level calculations
  • [ ] Simple: simple baseline, time, charge of a peak
  • [ ] To study: advanced baseline calculation
  • [ ] After pulses count
  • [ ] Avalanche and streamer charge integration and separation
  • [ ] Try to calculate charge of each gamma signal
• [ ] Aggregating statistics calculations
  • [ ] calculate features only from central strips
  • [ ] Gamma cluster rate calculations

09:30 → 09:50 Lab 256 activities

Speakers: Stefania-Alexandra Juks (Imperial College (GB)), Maria Jose Ramos, Mattia Verzeroli (Universite Claude Bernard Lyon I (FR))

Lab_status.pdf

09:50 → 10:10 GIF++ activities

Speakers: Mattia Verzeroli (Universite Claude Bernard Lyon I (FR)), Stefania-Alexandra Juks (Imperial College (GB))

10:10 → 10:30 904 ISE measurements

Speakers: Uzay Tan Islek, Mattia Verzeroli (Universite Claude Bernard Lyon I (FR))

16.08.2023 - Progress Update Presentation.pdf

Calculation of Fluoride Production Rate.pdf

Fluoride Production and Flowmeter Calibration Data - 16.08.2023.pdf

10:30 → 10:50 AoB

Speakers: Maria Jose Ramos, Mattia Verzeroli (Universite Claude Bernard Lyon I (FR)), Stefania-Alexandra Juks (Imperial College (GB)), Uzay Tan Islek

10:50 → 12:00 Olefin 3

Speaker: Gianluca Rigoletti (CERN)

To check:

• [ ] Technical Feasibility: what is the best library to perform what we need
• [ ] Required features to be added:
  • Proper baseline estimation under the presence of gamma background
  • Single / Multi Peak detection:
    • Number of after pulses and duration between them
  • Waveform storage deeply linked with analyzed data for quick retrieval and parameter validation
  • Gamma charge calculation
  • Timing: rise time of a signal?
  • Others?
• How to organize the work load and tasks