MADMAX Preparation for YETS 22/23

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Minutes of the MADMAX CERN Meeting

Presents: A. Dudarev, B. Rae, B. Majorovits, C. Krieger, D. Kreikemeyer, D. Strom,  J. Bernhard, L. Rowland, J M. Van dijk, P. Pralavorio, X. Genillon, A. Barrato Roldan, A Amamou, J. Bremer, J. Schaffran, N. Guillotin, T. Koettig

1. Introduction (J. Bernhard)

  • Restart of beam commissioning confirmed : 17-04.2023
  • Beam interlock test : 05-04.2023. During that day no one can access the zone but the work can continue (magnet and set-up can still run)

2- Water (A. Amamou)

  • 20.02.2023 : Restart of the cooling tower --> raw water
  • 22.02.2023 : Mixed water (18/22 deg C) available while waiting for chilled water
  • 03.03.2023 : Chilled water availability 

3- Cryogenics of the Morpurgo magnet (N. Guillotin)

  • YETS 2022/23 : Mandatory migration CPC5 to CPC6 for North Area Cryogenics Infrastructure including
    pistons process compressor dedicated to ATLAS H8 (Morpurgo), with development of a new process control of
    the helium compressors
  • 20.02.2023 : Start of cryo circuit conditioning on process compressor side
  • 22.02.2023 : Start of commissioning of the new process control of the compressor using mixed water
  • 03.03.2023 : End of commissioning of the new process control of the compressor. 
  • 03 or 06.03.2023 : Effective cool down start with process compressor connected to the cold box and Magnet
  • 27+/-1.03.2023 : Expected Cryo OK for the Morpurgo Magnet at 4.5K with Liquid Helium
  • 28+/-1.03.2023 : Magnet can be ramp up at 1.6 T
  • The margin mainly stands in the way we could potentially take less time for the compressor process control
    commissioning
  • Set-up a team Nicolas / Bastien / Pascal to monitor the progresses of the cooldown and adjust the time MADMAX should be ready to take data.


4- CB100 tests (B. Majorovits)

  • Will use a much simpler DAQ system than last year consisting in a single network analyser with 90% dead time. 
  • If 20 days at 1.6 T, could take 2 days of effective data taking, which give us a sensitivity slightly above the CAST limit (presently the world best limit) --> The earlier we start the better. Could run over Easter to end before beam commissioning 17.04.2023
  • SPSC meeting 07-08.02.2023. Waiting for the referees to contact us
  • In case of problem of data storage, TBs could be made available by CERN


5- G10 cryostat mechanical tests (D. Kriekemeyer / T. Koettig)

  • G10 cryostat to be delivered at MPI mid-Feb. Then send to CERN to be tested in the cryolab
  • Open points from last meeting (HE dewar transport, return line, ...) solved by the cryolab
  • Discussion to  be organized by Maarten, to move the concrete block in February (inc. Michael Lazzaroni )
  • Note : Sylvain Girod is the TSO of the area
  • Cryolab is waiting for the MADMAX budget code


6- Safety (L. Rowland)

  • Meeting to be organized by Laura to understand the details of the test this year

7. Next steps

  • Next meeting: Will be organized after magnet cool down start (>=06.03.2023). A doodle will be send by Johannes to find a date
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