Conductor Qualification and Fabrication for the MACQU Solenoid

A solenoid mock-up called
MA
dmax
C
oil for
Q
uench
U
nderstanding (MACQU) was designed and tested at CEA Saclay to study the quench propagation in a MAgnetized Disc and Mirror Axion eXperiment (MADMAX) like conductor, i.e., a cable-in-conduit conductor (CICC) with copper conduit cooled at 1.8 K with stagnant superfluid helium. Compared to classic CICCs for fusion magnets, the presence of a cable wrapped by a copper tape and inserted in a copper conduit represented new features from the manufacturing point of view that required a R&D program. In this article, the whole process that led to the final conductor designed for the solenoid MACQU, from strand characterization to the fabrication through the R&D and acceptance phases, is described.