Gas systems project

Monday 27 Jan 2020, 09:00 → 13:00 Europe/Zurich

155/R-047 (CERN)

Beatrice Mandelli (CERN), Frederic Merlet (CERN)

GAS M&O meeting 27 January 2020

Present: Beatrice, Roberto, Fred, Patrick, Kacper, Andrea, Michal, Mara, Federico, Fabio, Sabino

Indico: https://indico.cern.ch/event/882558/

 

ALICE #no elog

• MTR
  • Start with standard gas mixture on Tuesday

Reminder:

• • Alarm in power supply: DC MCB trip —> Michal/Patrick to check
  • exhaust pressure regulation does not work
  • mixer pressure regulation does not work: Zimmerli not installed
• CPV
  • Probably water in pipes —> try to flush with N2
  • Mounting the humidifier in the workshop
• TPC
  • Still leak present, system is running in Ar
  • In the purifier the small thermic box triggered (also last year it happened) —> Patrick/LPh to check
• TRD

Reminder

• • Purifier: to review if keep the safety valve or the rupture disk
  • Purifier: safety valve at the input where we have Ar or Ar/H2 at high pressure —> LPh to check with safety
  • Alarm on power supply

 

ATLAS #2209

• MDT
  • Working on the modification of pump module
  • Add a second H2O sensor for the exhaust and use this one to regulate
  • 3 MFCs calibration done, missing the one of Humidifier —> this week
  • Still some work in the electrical part to do
  • Found a circuit breaker almost broken —> bought a new one: it will arrive next week
  • Found a problem of grounding on pressure sensors —> a lot of investigation/work is needed
• General
  • Power of bande chauffant —> Patrick/Kacper
  • Several electrical problem in ATLAS:
    • See elog 2205, 2206, 2207
    • Patrick to prepare a protocol for the student to identify the failures

 

CMS #2202

• RPC
  • Test on rack 67: flow measured 40-50 l/h instead of 4-5 l/h (read by the flowcell)
    • Problems in doing measurements with Drycal: system stopped several times
    • To buy a voegtlin red for the test of flow tests
    • At this point the problem is electrical —> Michal to investigate
  • Roberto proposed to add flow sensors at the input and output of the distribution
  • iC4H10 MFC changed with the second one: still problem (percentage at 4%) —> maybe problem is in R134a MFC —> to try to move to the second R134a MFC
  • Reminder:
  • Missing quick manifold and flowcell in barrel +1 and +2
  • Swap of pipes in rack RE-1 (racks 61 and 65) and RPC 3.1 (racks 63 and 87)
  • Rack 85: to check if dummy chamber is installed, if yes to add pressure sensor connection
• DT

Reminder:

• • Difficult to re-start the gas system after power-cut —> to do some tests
  • Test for power cut and re-start for the exhaust line —> to do other tests
• CSC
  • Broken bubbler in rack 67 supply —> to mechanical modify the rack to have a protection (not possible to have the standard parete)

Reminder:

• • Warning to set-up —> Beatrice/Michal/Roberto
• GEM
  • System stopped on Friday during the maintenance procedure of TOTEM mixer
    • Piquet didn’t receive SMS
    • System re-started on Saturday after the weekly check

 

LHCb #2204

• RICH1
  • last week: 1.5% of Air like before, even if we stopped the system
  • new MFC installed: it is 33 l/h —> to block at 5 l/h
• General
  • Next week replacement of AUX PLC: Michal will send to Schneider the one that crashed

Reminder:

• • Interlock of Ar/H2 does not work —> Michal/Patrick to check
  • Problem with Profibus cable/connector module —> to understand where —> Patrick

 

PIQUET

• Several alarms of flammable gas in ALICE: all alarms were blocked by Andrea —> LPh to check and fix

 

GENERAL

• Presentation of LPh about the 2019 activities of ALICE
• Presentation of Sabino about CMS RPC regulation valves
  • Econex valve to test this week in the lab
• Mixer maintenance
  • Tried the procedure in CMS T1
  • Add flammable detection for flammable gases: to put outside the detection head or purge
  • Add purge to the mixer
• Presentation of Fabio about presence of leaks in CMS RPC

 

09:00 → 09:10 Status of RPC regulation valves

Speaker: Sabino Zagaria (Universita & INFN Pisa (IT))

CMS RPC new regulation valves_weeklymeeting.pdf

CMS RPC new regulation valves_weeklymeeting.pptx

09:10 → 09:20 MFC calibration campaign

Speakers: Beatrice Mandelli (CERN), Fabio Bordon (CERN), Federico Consolaro (CERN), Kacper Jerzy Kapusniak (CERN)

09:20 → 09:30 First feedbacks of the mixer maintenance

Speaker: Sabino Zagaria (Universita & INFN Pisa (IT))

-Mixer Maintenance performed on CMS TOTEM CSC (T1)

-Maintenance with Mixer in RUN and Mixer in STOP

-MFCs dismounted for validation check

-Filled form here:

G:\Departments\PH\Groups\TA1\Gas_group\002_LS2\Maintenance_Mixer\CMS_Mixer\TOTEM_CSC-T1

- T2 no communication: what should we do?

Ps. I perfectly know you might not need a procedure because you have a lot of experience on these systems, but this can be very helpful for newcomers with no experience. Please keep that in mind even if for you it might seem a loss of time. Your feedback is fundamental in order to improve the future M&O of the systems. Thank you!

09:30 → 09:40 Overview of planning LS2

Speaker: Beatrice Mandelli (CERN)

PLC:

https://its.cern.ch/jira/secure/WBSGanttMain.jspa?filter=BOARD_345

LS2:

Departments/PH/Groups/TA1/Gas_group/002-LS2

09:40 → 09:45 Piquet interventions

http://eloggas.cern.ch/GAS_PIQUET/

Speakers: Andrea D'Auria (CERN), Beatrice Mandelli (CERN), Frederic Merlet (CERN), Louis-Philippe De Menezes (CERN), Patrick Carrie (CERN), Kacper Jerzy Kapusniak (CERN), Michal Zbigniew Zimny (CERN)

09:45 → 09:50 Activities on-going

Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN)

09:50 → 10:10 Plan of LS2 activities

Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN), Roberto Guida (CERN)

10:10 → 11:35 Gas systems for the LHC experiments

10:25 ALICE

Speaker: Louis-Philippe De Menezes (CERN)

10:30 ATLAS

Speaker: Kacper Jerzy Kapusniak (CERN)

10:35 CMS

Speaker: Andrea D'Auria (CERN)

10:40 LHCb

Speaker: Patrick Carrie (CERN)

10:45 Gas analysis: standard H2O/O2

Speaker: Louis-Philippe De Menezes (CERN)

10:50 Gas web-page

http://test-gasmonitoring.web.cern.ch
https://ep-dt-gasanalysis.web.cern.ch

Speaker: Beatrice Mandelli (CERN)

10:55 Software

Speaker: Michal Zbigniew Zimny (CERN)

11:35 → 12:25 Gas System developments

11:35 Gas System Test-Bench

Speakers: Fabio Bordon (CERN), Sabino Zagaria (Universita & INFN Pisa (IT))

Electrical work to be tested

11:45 CMS CF4 recovery

Speakers: Fabio Bordon (CERN), Mara Corbetta (Universite Claude Bernard Lyon I (FR))

CMS-RPC LEAKS Summary 1.pdf

CMS-RPC LEAKS Summary 1.pptx

11:55 LHCb RICH2 CF4 recuperation

Speakers: Federico Consolaro (CERN), Mara Corbetta (Universite Claude Bernard Lyon I (FR))

analysis of CF4 bottle+battery when portable GC is back (w6?)

12:05 R134a Recuperation

Speakers: Federico Consolaro (CERN), Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Ian Crotty (University of Wisconsin Madison (US))

Testing pressure on iC4H10

Analysis kept on running

System is currently switched off

12:15 AoB

Speakers: Fabio Bordon (CERN), Federico Consolaro (CERN), Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Mara Corbetta (Universite Claude Bernard Lyon I (FR)), Sabino Zagaria (Universita & INFN Pisa (IT))

12:25 → 12:35 FSU & Jobs status

Speaker: Frederic Merlet (CERN)

12:35 → 12:45 AoB

Speakers: Andrea D'Auria (CERN), Beatrice Mandelli (CERN), Frederic Merlet (CERN), Louis-Philippe De Menezes (CERN), Patrick Carrie (CERN), Roberto Guida (CERN)