Mechanical Properties of ISABELLE Superconducting Coils

As a part of the manufacturing processes, several mechanical measurements are made on ISABELLE dipoles. These are done both to control the process and to provide information for the evaluation of the behavior of the completed magnets. This paper discusses the Young's Modulus (E = 1-3 × 10
⁶
psi), the thermal contraction of the coil assembly (ΔL/L = -290±17 × 10
^-5
at 77°K), and the loss of applied prestress with time (~ 20% for times 20 days).