Characterization of Prototype Superconducting Magnetic Quadrupolesfor the High Current Transport Experiment Page: 3 of 11
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Figure 1: The clear bore radius re and the maximum half-width wmax are illustrated in
cross-section for magnets with cylindrical shell and rectangular coil geometry.Rectangular
Y
structure ,.wa
coi,Cylindrical
y
structure
' coilsConductor Properties
" In the range of interest (4-6 T), the dependence of the critical current density on field
for NbTi conductor at 4.5 K is well approximated by a linear function:
dJ
J{B,To = Jr(Ba,To})+ (B,T3,)-(B - B)
dB
This characterization along with the following parameters (close to "SSC"
specifications) are to be assumed in calculating the minimum quench current of the
magnet:
Bo = 5T (reference field)
To = 4.5 K (reference temperature)
J (Bo,To)= 2.55 kA/mm2
(B0,T,) = -0.6 kA/(mnm Tesla)
diB
" The copper to superconductor ratio should be adjusted to obtain a copper current
density Jr, 1.3 kA/mm2 at the short sample current (see Appendix C).3
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Lund, Steven M.; Sabbi, GianLuca & Seidl, Peter. Characterization of Prototype Superconducting Magnetic Quadrupolesfor the High Current Transport Experiment, report, February 22, 2001; Berkeley, California. (https://digital.library.unt.edu/ark:/67531/metadc786487/m1/3/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.