Benda, V

Dauvergne, J P

Haug, F

Knoops, S

Lebrun, P

Momal, F

Sergo, S

Tavian, L

Vullierme, B

CERN Document Server

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCHEuropean Laboratory for Particle PhysicsUPGRADE OF THE CERN CRYOGENIC STATION FOR SUPERFLUID HELIUMTESTING OF PROTOTYPE LHC SUPERCONDUCTING MAGNETSV. Benda, J.P. Dauvergne, F. Haug, S. Knoops, Ph. Lebrun, F. Momal,V. Sergo, L. Tavian and B. VulliermeThe cryogenic infrastructure of the station for testing LHC prototype superconducting magnets insuperfluid helium below 2 K has been upgraded. Liquid nitrogen precooling has permitted to increasethe liquefaction capacity of the refrigerator. The addition of cold centrifugal compressors with apressure ratio of 3:1 has boosted the capacity of the warm pumping unit. To ensure adaptation of thepumping capacity, a heater-and-valve box allows to bypass the cold compressors. This box alsocomprises a 32 kW electrical heater for warming up the low-pressure gaseous helium before it entersthe volumetric warm pumping unit. Possible impurities in the helium returning from thesubatmospheric circuits are trapped in a freeze-out helium cleaner. Automatic process control andsupervision permit unattended operation and optimal management of the helium inventory.LHC Division, CERN, CH-1211 Geneva 23, SwitzerlandICEC 16/ICMC, Kitakyushu, Japan, 20-24 May 1996Geneva, Large Hadron Collider ProjectCERNCH - 1211 Geneva 23SwitzerlandLHC Project Report 20Abstract12/07/96

Upgrade of the CERN Cryogenic Station for Superfluid Helium Testing of Prototype LHC Superconducting Magnets

The LHC Study Group

Benda

Dauvergne

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Upgrade of the CERN Cryogenic Station for Superfluid Helium Testing of Prototype LHC Superconducting Magnets

Abstract

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