CERN Central Helium Liquefier Liquid helium supply to
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CERN Central Helium Liquefier Liquid helium supply to AD complex 1. 2. 3. 4. 5. Liquid helium deliveries to AD experiments in 2016 (reminder) Status of the liquid helium deliveries to AD experiments in 2017 Phase one: On-going studies on the AD distribution mode (cryogen distribution line for liquid helium and liquid nitrogen) Phase two: Option for increasing the liquid helium supply to AD experiments Budget & resources 29/10/2020 DD; TE-CRG 1
CERN Central helium liquefier 2016 figures (reminder) 83% of the annual production was allocated to all AD experiments 2018 ALPHA-g required deliveries (200’ 000 liters equivalent) 83% 100% Specifically: ALPHA received 33% of the AD deliveries (and equivalent to 27% of the global annual production) 29/10/2020 DD; TE-CRG 2
CERN Central helium liquefier 2017 figures (present status) ALPHA experiment received 38% of the AD deliveries (and equivalent to 30% of the global annual production; Sept. 2017); slightly increased supply with respect to 2016 figures (33% and 27% respectively) 29/10/2020 DD; TE-CRG 3
Phase one: AD Cryogenic Distribution Line (studies on-going) Implementation of a Cryogenic Distribution Line inside the AD complex thus suppressing the heavy logistics of liquid helium supply by means of mobile dewars from the CERN Central helium liquefier; The proposed consolidation will not increase the present helium supply capacity 10’ 000 liters LHe dewar replaced every week (filled at CERN premises) Progress has been made to : • Functional requirement of the cryo-line (working with the AD experiments) • • Possible routing of cryo-line; • Basic PFD, including the number of intermediate buffer dewars required Target for installation & commissioning: LS 2 29/10/2020 (2019 -2020) Ready for review of concept. DD; TE-CRG 4
Phase two: Option for increasing the liquid helium supply to AD Implementation of a dedicated helium cryogenic plant experiments coupled to the Phase one installed 10’ 000 liters dewar connected to the Cryogenic Distribution Line inside the AD complex This option will provide full autonomy to the AD complex (from 10’ 000 l/week today towards 15’ 000 to 23’ 000 l/week • Use of an existing CERN cold box (normal rate 90 l/h, boosted 140 l/h) New equipment requirements: • Helium compressor station • Building (140 m 2) housing the cryogenic plant • Gaseous helium storage (2 x 80 m 3, 20 b) • Liquid nitrogen storage (1 x 50 m 3) • Utilities (3. 3 k. V & Cooling) for the compressor station and cold box 29/10/2020 • Possible Target for installation & commissioning: 2021 -… DD; TE-CRG 5
Phase two: Option for increasing the liquid helium supply to AD experiments CERN existing cold box in its latest operational configuration, now decommissioned) (former Bloc 4 cryogenic test bench facility in North Area for short superconducting magnets) 29/10/2020 DD; TE-CRG 6
Phase two: Option for increasing the liquid helium supply to AD experiments AD complex Helium liquefaction building to be constructed Potential location 140 m 2 required 29/10/2020 DD; TE-CRG 7
Budget & resources Phase 1 (10’ 000 l dewar and Cryogenic distribution Line implementation) • no liquid helium supply capacity increase; dramatically improved logistics • Resources: 3. 5 FTE (in the MPP), Budget: 800 k. CHF (AD consolidation budget) • Studies on-going; target for installation & commissioning: LS 2, 2019 -2020 Phase 2 (dedicated helium cryogenic plant); Preliminary estimate for main only components • AD complex full autonomy achieved, substantial helium supply capacity increase • Resources: 8. 5 FTE (not in the MPP), Budget: 3. 3 MCHF (not financed) ü CERN existing cold box refurbishing in manufacturer’s premises: 0. 5 MCHF ü Helium compressor station 1. 5 MCHF ü Gaseous helium storage (2 x 80 m 3, 20 b) 0. 1 MCHF ü Liquid nitrogen storage (1 x 50 m 3) 0. 15 MCHF ü Automation, process controls & electricity 0. 2 MCHF ü Utilities 0. 2 MCHF (tbc) ü Building (140 m 2) housing the cryogenic plant 0. 65 MCHF (tbc) Possible 2021 -… 29/10/2020 target for installation & commissioning: DD; TE-CRG 8