Abstract
The superconducting magnets of the Large Hadron Collider (LHC) will be protected by safety relief valves operating at 1.9 K in superfluid helium (Hell). A test facility was developed to precisely determine the heat load and the mass leakage of cryogenic valves with Hell at their inlet. The temperature of the valve inlet can be varied from 1.8 K to 2 K for pressures up to 3.5 bar. The valve outlet pipe temperature can be regulated between 5 K and 20 K. The heat flow is measured with high precision using a Kapitza-resistance heatmeter and is also crosschecked by a vaporization measurement. After calibration, a precision of 10 mW for heat flows up to 1.1 W has been achieved. The helium leak can be measured up to 15 mg/s with an accuracy of 0.2 mg/s. We present a detailed description of the test facility and the measurements showing its performances.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
W. Erdt, G. Riddone, R. Trant, The Cryogenic Distribution Line for LHC: functional specification and conceptual design, paper presented at this conference.
M. Kuchnir, J.D. Gonczy, and J.L. Teague, in “Advances in Cryogenic Engineering, vol. 31”, Plenum Press, New York (1985), 1285.
H. Danielsson, G. Ferlin, B. Jenninger, C. Luguet, S.-E. Millner, J.-M. Rieubland, Peformance of a superfluid helium safety relief valve for the LHC superconducting magnets, in “Advances in Cryogenic Engineering, vol. 41”, Plenum Press, New York (1995), 805.
S.W. Van Sciverciver. “Helium cryogenics”, Plenum Press (1986) 178.
L. Dufay, A. Perin, and R. van Weeldeeren, Characterization of prototype superfluid helium safety relief valves for the LHC magnets, paper presented at this conference.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2000 Springer Science+Business Media New York
About this chapter
Cite this chapter
Bézaguet, A. et al. (2000). A Facility for Accurate Heat Load and Mass Leak Measurements on Superfluid Helium Valves. In: Shu, QS. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4215-5_4
Download citation
DOI: https://doi.org/10.1007/978-1-4615-4215-5_4
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-6892-2
Online ISBN: 978-1-4615-4215-5
eBook Packages: Springer Book Archive