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Preliminary design of a helium cryogenic system for SAND detector at LBNF-DUNE near site

Conference · · IOP Conf.Ser.Mater.Sci.Eng.
 [1];  [2];  [2];  [1];  [1];  [2];  [2];  [1];  [1]
  1. LBL, Berkeley
  2. Fermilab
+ Show Author Affiliations
The Long-Baseline Neutrino Facility (LBNF) is providing a helium cryogenic system to support the superconducting solenoid magnet of the System for on-Axis Neutrino Detection (SAND) for the Deep Underground Neutrino Experiment (DUNE) Near Site at Fermilab in Batavia, IL. The design started in 2020 and construction is set to begin in the mid 2020‘s.The helium cryogenic system primarily consists of a helium refrigerator system, distribution valve boxes, vacuum-jacketed helium and nitrogen transfer lines, warm gaseous helium transfer system, instruments and control system, and gaseous helium storage tanks. It is designed to provide supercritical helium at around 3 bara and 5 K with expansion from 3 to 1.2 bara in the SAND cryostat and 70K forced cold gas helium to cool the thermal shields of the SAND cryostat. The SAND superconductive magnet is indirectly cooled through a liquid helium thermosiphon cycle. A pair of 3 kA leads is cooled by the gas helium vaporized from the liquid helium reservoir in the cryostat turret. The helium system will share the liquid nitrogen tank and liquid nitrogen phase separator with the Near Site Liquid Argon system. The helium recycle compressor system, GHe tanks and LN2 tank will be located on the Surface. The cryogenic facilities including refrigerator cold box, valve boxes and LN2 phase separator will be located on the shaft cryo-mezzanine in the underground cavern. The shaft connecting surface and cavern is more than 60 meter deep. The helium vacuum-jacketed transfer line between the cold box and the SAND magnet is more than 50 meter long. This paper presents the preliminary design of the helium cryogenic system including the design scheme, process flow diagram, heat load estimates, layout plan and so on.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
DOE Contract Number:
AC02-07CH11359
OSTI ID:
1877628
Report Number(s):
FERMILAB-CONF-22-505-LBNF-TD; oai:inspirehep.net:2105149
Conference Information:
Journal Name: IOP Conf.Ser.Mater.Sci.Eng. Journal Volume: 1240
Country of Publication:
United States
Language:
English

References (3)

Conceptual Design of DUNE Near Detector Superconducting Magnet System journal June 2020
Progress in the design and manufacture of the KLOE solenoid for the DAPHNE ring at Frascati journal June 1997
Status of DAΦNE and KLOE journal March 1999

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