Stress and safety analysis of 9T superconducting solenoid magnet for RIB facility

A high field superconducting solenoid magnet is required for the beam- line of radioactive ion beam facility at VEC Centre, Kolkata. The superconducting solenoid magnet generates a magnetic field of 9T and large magnetic stress due to magneto mechanical forces. A micro slip movement in the coil due to the magnetic force can generate local heating and coil may become resistive. This phenomenon is called quench. In order to restrict any such movement in the coil and thereby prevent quench, a detailed analysis of quench and quench- induced stress is essential. In this paper, a detailed stress analysis have been formulated analytically for pre-stress, thermal stress and magnetic stress and compared with simulation results obtained by ANSYS code. Quench analysis of the magnet has also been discussed in detail. The temporal variations of current, temperature rise, voltage drop and normal zone propagation during quench have been carried out by using a quench solver computer code OPERA. The quench protection techniques and its effects on temperature rise and voltage drop has also been discussed.