CRYRING CCC cryostat - GSI chat with ILK (in GERMAN)

Friday 19 Dec 2025, 10:00 → 11:00 Europe/Zurich

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Gunn Khatri (CERN), James Storey (CERN), Mark Mclean (CERN), Thomas Sieber, Volker Tympel

Draft:

Present: Gunn, Thomas, Volker, Svenja, ILK team (cryostat supplier), NTP team(ceramic supplier), anyone else ?

Discussion:

ILK presentation:

• Note that this meeting was dedicated for CRYRING CCC cryostat (between GSI and ILK), Gunn was invited from CERN as observer
• the discussion was all in german but slides by ILK (Gregor Trommler) were in english and mostly technical so it was possible to follow up
• Main focus was cryostat 3D model and design, checking details, dimentions etc. 
• Beam pipe 100 mm, DN100CF flange, there is also adapter flange

 

Volker presentation:

• few slides showing the ferrite magnetic core (pick up coils) from Magnetec Hungary Ltd
• Volker said he has enough cores for 2 or 3 CCC to build ? 
• The hungarian company is not interested in making such large cores anymore
• 1.25mm lead sheet
• Epoxy glass (G10) material used as enclosure + spacer

 

Svenja presentaton:

• Svenja (student from Leipzig/Jena) showed her work on active filtering of the noise in two squid readouts
• Amplitude and phase compared for two squids.
• Since one is inverted, the phase difference should be 180 degree, but in reality around 204 degree
• The pulse/peaks (time structure) pattern however is pretty similar in two squids
• Svenja explained the math and procedure for filtering the noise and then demo of the noise removal (e.g. 1.5 Hz He compressor beats)

 

Gunn questions to Thomas/Volker:

• what can CERN provide in terms of help/resources ?
• Thomas: having your FESA class GUI and radiation hardness study of Magnicon electronics will be of a great help
• Gunn: sure, FESA class we can provide, I will check with Stephane Bart Pederson and Mark. 
• Gunn: Mark has initiated radiation hardness test and dosimetry in AD with R2E team, plus the R2E team is doing fluka simulations in SHiP beamlines
• For CERN a cryostat with additional port to fill LHe should be followed up in January in 2026 with ILK
• CERN side we still need to finalize HSE safety concerns for LHe dewar transport, electronics hardness and integration constraints ! (expected in Jan 2026)

10:00 → 11:00 Discussion - Agenda

Meeting between GSI and ILK in German (Gunn is invited to observe)
See minutes for details

Speakers: Gunn Khatri (CERN), James Storey (CERN), Mark Mclean (CERN), Thomas Sieber, Dr Torsten Koettig (CERN), Volker Tympel