COMMISSIONING THE CRYOGENIC SYSTEM OF THE FIRST LHC SECTOR | Zendy

F. Millet | Zendy; S. Claudet | Zendy; G. Ferlin | Zendy; A. Perin | Zendy; R. Rabehl | Zendy; G. Riddone | Zendy; L. Ronayette | Zendy; Luigi Serio | Zendy; M. Soubiran | Zendy; L. Tavian | Zendy; J. G. Weisend | Zendy; John Barclay | Zendy; Susan Breon | Zendy; Jonathan Demko | Zendy; Michael DiPirro | Zendy; J. Patrick Kelley | Zendy; Peter Kittel | Zendy; Arkadiy Klebaner | Zendy; Al Zeller | Zendy; Mark Zagarola | Zendy; Steven Van Sciver | Zendy; Andrew Rowe | Zendy; John Pfotenhauer | Zendy; Tom Peterson | Zendy; Jennifer Lock | Zendy

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COMMISSIONING THE CRYOGENIC SYSTEM OF THE FIRST LHC SECTOR

Author(s) -

F. Millet,

S. Claudet,

G. Ferlin,

A. Perin,

R. Rabehl,

G. Riddone,

L. Ronayette,

Luigi Serio,

M. Soubiran,

L. Tavian,

J. G. Weisend,

John Barclay,

Susan Breon,

Jonathan Demko,

Michael DiPirro,

J. Patrick Kelley,

Peter Kittel,

Arkadiy Klebaner,

Al Zeller,

Mark Zagarola,

Steven Van Sciver,

Andrew Rowe,

John Pfotenhauer,

Tom Peterson,

Jennifer Lock

Publication year - 2008

Publication title -

aip conference proceedings

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.177

H-Index - 75

eISSN - 1551-7616

pISSN - 0094-243X

DOI - 10.1063/1.2908500

Subject(s) - large hadron collider , cryogenics , project commissioning , superconducting magnet , nuclear engineering , transfer line , engineering , water cooling , environmental science , magnet , mechanical engineering , physics , nuclear physics , thermodynamics , publishing , political science , law

The LHC machine, composed of eight sectors with superconducting magnets and accelerating cavities, requires a complex cryogenic system providing high cooling capacities (18 kW equivalent at 4.5 K and 2.4 W at 1.8 K per sector produced in large cold boxes and distributed via 3.3-km cryogenic transfer lines). After individual reception tests of the cryogenic subsystems (cryogen storages, refrigerators, cryogenic transfer lines and distribution boxes) performed since 2000, the commissioning of the cryogenic system of the first LHC sector has been under way since November 2006. After a brief introduction to the LHC cryogenic system and its specificities, the commissioning is reported detailing the preparation phase (pressure and leak tests, circuit conditioning and flushing), the cool-down sequences including the handling of cryogenic fluids, the magnet powering phase and finally the warm-up. Preliminary conclusions on the commissioning of the first LHC sector will be drawn with the review of the critical points already solved or still pending. The last part of the paper reports on the first operational experience of the LHC cryogenic system in the perspective of the commissioning of the remaining LHC sectors and the beam injection test

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