Gas systems project

Europe/Zurich
40/5-A01 (CERN)

40/5-A01

CERN

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Beatrice Mandelli (CERN)

GAS M&O meeting 1 October 2021

Present: Beatrice, Roberto, Patrick, Andrea, Fred, Kacper, Mattia, Fabio, Mara, Gianluca

Indico: https://indico.cern.ch/event/1080435/

 

ALICE #3580

TPC

  • to change pressure sensors from bara to barg —> LPh
  • Understand purifier column sequence issue with Michal and if we can decrease pulses to avoid spikes in loop pressure 

To remember

  • new MFC to install
  • pump regulation valve noisy since the restart (~10%) —> to check old PID

From previous meeting (05/10)

  • Krohne: only present one readying for the full system (distribution is just one channel) —> Leonardo gave to Michal the formula (15/10) —> Michal to implement

TRD

To remember:

  • distribution module: one big difference between PT and pressure gauge: to check which one is wrong
  • T sensor in pump: Patrick said he can do but it takes time
  • difficult to restart: need to work on PID of pump and distribution when correct gas present
  • problem of noise in the read-out of Krohne to investigate
  • Brown bottle to fill: tested in another bottle and from the test we know now that it has to be done all manual --> LPh to check with Chilo when to do
  • disk de rupture: they work —> LPh has to contact the safety
  • purifier Xe recuperation humidity at -10 C —> Gianluca to check if is ok

HMP

  • system re-started, some problems found:
    • CH4 lines closed —> informed David but we did by ourself
    • webmas dead since June 21 —> Gianluca replaced
    • O2 cell dead: no Ar flushed in analysis chain —> LPh to replace O2 cell
    • by resting flowcell for HMPID, you reset also the one of  MTR
    • no flow reading in envelop

From previous meeting (03/08):

  • Distribution rack in alarm —> LPh to check

MTR

  • no ArH2 arriving to purifier —> LPh to check
  • XMFC of exhaust and humidifier in error (also others exhaust MFCs sometimes are in error) —> Michal/Kacper to connect to the MFC to try to understand why

From previous meeting (22/01)

  • at start of the mixer, SF6 concentration is not correct —> Michal/Gianluca to investigate
  • back-up to check —> LPh
  • pressure sensor on the chamber doesn’t work —> LPh
  • Tescom of the Zimmerli of the exhaust broken —> LPh to change
  • Zimmerli of exhaust and mixer don’t have the remote control —> LPh to implement
  • MFCs of humidifier and exhaust in error (but it seems they work) —> Michal/Patrick to investigate
  • pump regulation to check as it doesn’t work well at the start of the system
  • to connect dummy chamber electrically —> LPh

To remember

  • leak test and maintenance in the distribution —> LPh/Mattia

TOF

To remember

MCH

To remember

  • still some work in PID tuning

PGS

  • CH4: all valves closed
  • N2 flow alarm blocked: HH consumption: why?

To remember

  • SF6 PGS is scheduled in 2022 —> LPh to check with David if it can be done this year

 

ATLAS #3581

MDT

To remember:

  • calibration bottle arrived for H2O sensors
  • found 60 ppm of offset in Vaisala (but within the specification): new calibration to do (bottle ordered)
  • list of pressure sensors replaced in the last years —> Kacper
  • some spikes in flowcells after the upgrade, spikes also up to 3000 l/h so it is not a real flow spike —> Gianluca to prepare few examples
  • Rack 73: change of ELMB and now ok. Michal to check the ELMB in the lab
  • problem in one VAISALA reading but it is not the sensor —> to investigate

RPC

  • rack 61, 62, 63, 64, 66, 67, 69 ON with 98%N2, 2%R134a. Mixer at the limit
  • flowcells calibration problem: racks 66, 67, 68, 69 to check/recalibrate —> Michal/Gianluca
  • rack 68, 69 recalibrated but still problem not understood in 69, maybe due to low flow?
  • purifier under vacuum

To remember:

  • purifier 3: missing MFC for conditioning
  • changed motherboard/ELMB in rack 63 because of channel 2 in error (it was already changed in 2020)—> Michal to check motherboard/ELMB removed

TGC

  • flowcell to check for new rack, we have to have everything calibration in 100% CO2 —> Michal/Kacper
  • exhaust pipes finished, missing heating cable and electrical connection —> Kacper/Patrick
  • work on-going to run with nPentane
  • gas system on
  • for pilot run: A side with nPentane, c side local CO2 flushing
    • need to do a short test for pump and evaporator with n-pentane

TRT

From previous meeting (23/10)

  • Krohne new formula prepared by Leonardo —> Michal to implement
  • Krone exhaust not working properly: to check if it is the krohne or our electrical part. Patrick to try to check the electrical part
  • Kacper to check for regeneration of purifier material

MMG

  • MMG 1700 ppm of H2O: ok
  • rack 61: to check electrically to connect to MM gas system: deadline beginning of November —> Patrick/Kacper
  • to check for DSS signal: can we connect to the CSC? —> Kacper to check with ATLAS
  • to do safety visit for flammable gas —> Beatrice/Kacper

 

CMS #3576

RPC

  • flowcells of rack 77 have a deviation of 75%: changed with new flowcell but still some problem in webmas config —> Mara too heck
  • to change membrane of pump
  • leak in bubbler of rack 63: bubbler ordered
  • 2 pumps in the loop but problem with valve: new needle valve ordered
  • to check with VonRohr for pump and group regulation valves —> Mara

To remember:

  • low flow MFC (1200 l/h) received —> to plan installation
  • iC4H10 problem: still 0.1% difference—> Mara to check with the company:
    • according to company calibration should be performed once/month. coherent with discrepancy we see, develops after ~ 4-6 weeks. Calibration has to be done manually, 5% isobutane bottle is flammable, cannot stay permanently connected in rack (checked with R. Perruzza)
  • Group regulation valves that are at 85% for group 1 and 5 —> Andrea/Mara to check

CSC

  • increase of flow to have 1% of N2

To remember to do

  • zimmerli in parallel to MFC of exhaust didn’t open when recovery stop —> to do some tests —> Mara/Andrea
  • Difference in PT5005-PT5010: is it in the purifier? --> Mara to check
  • To put scale sticker on all bubblers —> Andrea-
  • new Von Rohr regulation valve to test

DT

  • O2 sensors calibrated but Ar went to VDC chambers: to check why. Roberto suggested that it depends if calibration is done in auto mode or manual mode —> Mara/Andrea to check
  • week 40 in open mode?

To remember

  • test on the exhaust module since when there is a start after a stop we loose ~0.1-0.2 bar: it looks like regulation valves in distribution open too fast. PID changed, to do other tests

GEM

  • to change pump membrane

To remember:

  • check of safety valves

TRACKER

  • MFM to install, waiting green light form users

 

 

LHCb #3579

RICH2

  • request to go back in CO2 in week 40/41: to check with Christoph when —> Mara/Patrick

To remember

  • IR analysis: to add pump for recycling the gas —> Patrick/Mara
  • to investigate stop of RICH2: maybe related to profibus? module WAGO changed
  • Leak test of purifier on-going: done but not report
  • New leak appeared: probably at detector level. Patrick is checking with Christoph
    • Detector people changed some connectors of cables at the detector level
  • PT5005 changed but still spikes visible: to think about
  • problem of high injection of CO2 from the mixer
    • probably due to purifier (leak in column A + not saturated in CO2)
    • leak already present in 2018 (elog #2886)

MWPC

  • CF4 started last Monday, mixer at 150 l/h to have correct gas mixture. Change back to 88 l/h on Friday
  • still a leak present: to check flowcell reading —> Mara

From previous meeting

  • SG-UX pipe to test
  • check of flowcells reading and check with Oleg if he does some leak test —> Mara/Patrick
    • impossible to do leak test at detector level unless we know exactly what distribution section to test no leak search was ever performed on their side as it is very difficult  side A can be accessed in autumn but they cannot test all chambers

Reminder

  • found leak, probably on distribution: new test and no leak found

ANALYSIS CHAIN 3

Reminder

  • leaks in electro-valves —> to change all

SciFi

  • presentation by Mara on possible alarms
  • still to pull some cables for DSS signal and signal from EN —> Patrick to check status
  • UPS to install
  • 2 DSS cables to pull: one for compressor on/off (for gas team) and one for detector team
  • discussion on pressure of safety valves now at 200 mbar —> Beatrice to verify with Sune

PGS CF4

From previous meeting

  • two panels for the CF4: flow in one and pressure in the other —> Michal/Patrick to fix
  • panel not used: to change the label in “Spare”
  • not anymore buttons for “put back on” the sides —> Michal to remove the two squares from visualisation and to check if something in software logic has to be changed
  • new system of switch between the two side —> Mara to check at which pressure there is the switch

 

NON-LHC #518

Reminder:

  • Some valves in force mode in LINAC —> Fabio/Roberto to put comment
  • LINAC4: to buy a spare PLC Siemens —> Michal next year
  • NA62: to check if we need to buy only the new PLC or also the I/O cards —> Michal

 

SOFTWARE

From previous meeting

  • new monitoring page “Exhaust++” done for ATLAS MDT explained by Gianluca. Everybody to look and give comments
    • next step: to do a similar page for one gas system for each experiment
  • To check for having warning in difference between PT5011 and PT5005
  • New feature for alarm when system is OFF: to provide to Michal the list of alarms we want to have when system are OFF —> Mara/Gianluca with experiment technical responsible by week 5
  • Profibus/canbus monitoring: Michal shows where we have and where it could be useful to have (based on history of problems in the past). To discuss if regeneration of code is worst for these system
  • We need to define how to proceed for the classification of warnings and alarms
  • Slide on the modifications asked by Schniedr with pictures and time needed to do modification
  • To fix the StepWS problem asap otherwise difficult to have history in case of problems —> Michal/Gianluca
  • Patrick will prepare a box with all spare material for PLC. Box will be in electrical workshop
  • For system with old PLCs: Michal to add in the rack an old spare PLC
  • For TFC: Michal to ask to Majec for a spare IO card (special one for TFC)

 

PIQUET

 

GENERAL

From previous meeting

  • Found problem of PROFIBUS MDT: termination of PROFIBUS PA on the connector was wrong —> to change in ALL gas systems
  • Aging test priority
    • To do: Airliquide pressure reducer, IR iC4H10 BINOS (they do aging —> LPh to check for modification)
There are minutes attached to this event. Show them.
    • 14:00 14:05
      Piquet interventions 5m

      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), Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR))
    • 14:05 14:15
      M&O and project organization 10m
      Speakers: Beatrice Mandelli (CERN), Roberto Guida (CERN)
    • 14:25 14:30
      Activities on-going 5m
      Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN)
    • 14:30 14:50
      Plan of LS2 activities 20m
      Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN), Roberto Guida (CERN)
    • 14:50 15:10
      NA61 and ND280 update 20m
      Speakers: Andrea D'Auria (CERN), Fabio Bordon (CERN), Frederic Merlet (CERN), Kacper Jerzy Kapusniak (CERN), Mattia Busato (Institut National Polytechnique de Grenoble (FR)), Patrick Carrie (CERN)
    • 15:10 15:20
      CLOUD update 10m
      Speakers: Louis-Philippe De Menezes (CERN), Patrick Carrie (CERN)
    • 15:20 16:45
      Gas systems for the LHC experiments
      • 15:35
        ALICE 5m
        Speakers: Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Louis-Philippe De Menezes (CERN)
      • 15:40
        ATLAS 5m
        Speakers: Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Kacper Jerzy Kapusniak (CERN)
      • 15:45
        CMS 5m
        Speakers: Andrea D'Auria (CERN), Mara Corbetta (AGH University of Science and Technology (PL))
      • 15:50
        LHCb 5m
        Speakers: Mara Corbetta (AGH University of Science and Technology (PL)), Patrick Carrie (CERN)
      • 15:55
        Not-LHC experiments 5m
        Speaker: Fabio Bordon (CERN)
      • 16:00
        Software 10m
        Speakers: Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Michal Zbigniew Zimny (CERN)
      • 16:10
        Gas web-page 5m

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

        Speaker: Beatrice Mandelli (CERN)
      • 16:15
        Gas analysis: standard H2O/O2 5m
        Speaker: Louis-Philippe De Menezes (CERN)
    • 16:45 17:35
      Gas System developments
      • 16:45
        Gas System Test-Bench 10m
        Speaker: Fabio Bordon (CERN)
      • 16:55
        CMS CF4 recovery 10m
        Speakers: Fabio Bordon (CERN), Mara Corbetta (AGH University of Science and Technology (PL))
      • 17:05
        LHCb RICH2 CF4 recuperation 10m
        Speaker: Mara Corbetta (AGH University of Science and Technology (PL))
      • 17:15
        R134a Recuperation 10m
        Speakers: Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Mara Corbetta (AGH University of Science and Technology (PL))
      • 17:25
        AoB 10m
        Speakers: Fabio Bordon (CERN), Gianluca Rigoletti (Universite Claude Bernard Lyon I (FR)), Mara Corbetta (AGH University of Science and Technology (PL))
    • 17:35 17:45
      FSU & Jobs status 10m
      Speaker: Frederic Merlet (CERN)
    • 17:45 17:55
      AoB 10m
      Speakers: Andrea D'Auria (CERN), Beatrice Mandelli (CERN), Frederic Merlet (CERN), Kacper Jerzy Kapusniak (CERN), Louis-Philippe De Menezes (CERN), Patrick Carrie (CERN), Roberto Guida (CERN)