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Mechanical design of a second generation LHC IR quadrupole

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11 Author(s)
Caspi, S. ; Lawrence Berkeley Nat. Lab., CA, USA ; Bartlett, S.E. ; Dietderich, D.R. ; Ferracin, P.
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One of the proposed options to increase the LHC luminosity is the replacement of the existing inner triplets at the interaction regions with new low-beta larger aperture quadrupoles operating at the same gradient. Lawrence Berkeley National Laboratory (LBNL) is carrying out preliminary studies of a large-bore Nb3Sn quadrupole. The mechanical design presents a support structure based on the use of keys and bladders without self-supporting collars. This technology has been proven effective in several successful common coil Nb3Sn dipoles built at LBNL, and it is for the first time applied to a cos(2ϑ) design. In this paper, we present a detailed analysis of the quadrupole mechanical behavior, demonstrating the possibility of delivering, through this method, well-controlled coil pre-compression during assembly, cool-down and excitation. The study has been performed with the finite element program ANSYS.

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:14 ,  Issue: 2 )

Date of Publication:

June 2004

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