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The measurement of friction coefficient down to 1.8 K for LHC magnets

✍ Scribed by Kurt Artoos; David Clair; Alain Poncet; Frédéric Savary; Raymond Veness

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
313 KB
Volume
34
Category
Article
ISSN
0011-2275

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✦ Synopsis

The Large Hadron Collider (LHC) proposed for construction at CERN consists of a series of high field superconducting dipole magnets operating at 1.8 K. The mechanical structure of these magnets contains many components in close contact. A knowledge of the friction coefficient between these components is required. Indeed, during assembly and cool down of the magnets, prestresses must be transferred to the superconducting coils. During operation, frictional heating may provoke loss of superconductivity. A machine has been built at CERN to measure the coefficient of friction from room temperature down to 1.8 K. This paper describes the cryogenic tribometer and the results collected to date.

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