Membrane cryostats for
large volume neutrino detectors
European cryogenic days
June 9th, GENEVA
Disclaimer
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09/06/2016 GTT for European cryogenic days
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Agenda
1- Company overview
09/06/2016 GTT for European cryogenic days
2- A first prototype: 17 m³ LAr tank
3- Two new 600 m³ LAr tanks
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4- Next step
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09/06/2016 GTT for European cryogenic days
Company overview
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GTT in brief
An engineering company with more than 50
years of experience in the design of the
Membrane Cargo Containment Systems for
cryogenic liquids
09/06/2016 GTT for European cryogenic days
GTT is a public company listed on the
Euronext Stock Exchange (Paris)
About 120 ships and onshore tanks currently
on order
Around 380 highly qualified people, mainly at
head office, but also present worldwide
(1)
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One project already designed for CERN and
two others ongoing
As at December 31st, 2015
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GTT membrane technologies
NO96 system
Mark III system
Primary stainless
steel membrane
Top bridge
pad
Corner
panel
Metallic insert
09/06/2016 GTT for European cryogenic days
Hard wood
key
Inner hull
Insulation panel
Resin ropes
Primary Invar
membrane
Invar
tongue
Composite secondary membrane (Triplex)
Primary
insulation box
Coupler
Secondary Invar
membrane
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Inner hull
Secondary
insulation box
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09/06/2016 GTT for European cryogenic days
A first prototype: 17m³ Lar tank
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Context
Main targets of the « prototype », a 17m3 tank containing liquid Argon
Approving membrane technology in contact with Argon (keep the
Argon very pure)
Approving the thermal efficiency of the insulation system
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09/06/2016 GTT for European cryogenic days
Approving the instrumentation system developed to detect neutrinos
A real challenge for GTT
First time for GTT to design container for Liquid Argon:
Argon specificities
-188°C
1400 kg/m³
Keep an high purity of the stored Argon (no pollution from containment system)
Thermal flux limited to 5W/m²
Foam density: 70kg/m³
Top cap
about 20 crossing pipes in 6m²
Removable element
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Tank: Three liners of insulation (1m)
09/06/2016 GTT for European cryogenic days
Tightness of the primary container reaching 10-9 mbar.l.s-1
An innovative solution
Adapted to CERN needs:
3 isolating layers: 400mm +
2*300mm
Specific panels arrangement
Stainless steel (tank)
Invar (Top Cap)
Dedicated corrugation arrangement
(1.2m high) in upper part of the
tank
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A mix between two insulation
systems made of:
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Double containment
Construction already completed
Containment system for tank:
Built at CERN premises
Built at
premises
Already delivered at CERN
Next steps:
Instrumentation installation is ongoing
Top cap installation scheduled during summer
Cool down of the tank in the second half 2016
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Containment system for top cap:
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By
, a company specialized in the
GTT’s membrane system installation
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09/06/2016 GTT for European cryogenic days
Two new 600 m³ LAr tanks
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CONTEXT: Two different detectors
GTT’s system has been selected for this new step of development
NP02 tank :
Single phase TPC as a prototype for the DUNE
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NP04 tank :
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Double phase TPC (Time Projection Chamber ) as a prototype for the DUNE
experiment
Franco Sergiampietri, 31 July 2017, 13
A new challenge for GTT
Two liners of insulation (0,8m)
Triple containment system
Foam density: 90kg/m³
High density of crossing pipes (mainly on top side)
About 60 elements from Ø30 to 700mm
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Pipes crossing 3 liners
09/06/2016 GTT for European cryogenic days
First time for GTT to design:
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09/06/2016 GTT for European cryogenic days
Next step
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LBNF/DUNE project
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09/06/2016 GTT for European cryogenic days
Final goal?
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09/06/2016 GTT for European cryogenic days
Thank you for your attention
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Jérôme Pellé • [email protected]
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