Mechanical tests of ATLAS barrel toroid tie rods

An installation has been designed and manufactured to test the tie rods of superconducting magnets of Atlas Barrel Toroid at tension load 2.5 MN (about 520 MPa maximum tensile stress) and with temperature gradient along the tie rod from 10 K to 270 K. All the 64 tie-rods have withstood the loading and remained in an elastic mode without any traces of plastic behavior.