Test results of the DPC-TJ: mechanical performance

The mechanical performance of the DPC-TJ coil was measured during the charge-up test by strain gauges and displacement gauges attached directly to the coil surface. To estimate winding stiffness, expansion tests were performed on a winding model at both 300 and 77K. The test results obtained with the DPC-TJ coil were compared with calculations obtained by the finite element method (FEM) analysis and expansion test results. Such comparison showed that equivalent Young's moduli calculated by the FEM were in good agreement with those measured during the charge-up test of the DPC-TJ coil, which had a higher rigidity than the winding model. As a result of the charge-up test, it was demonstrated that the DPC-TJ coil had high rigidity, as designed. (author)