RADIATION DAMAGE TO THE ELEMENTS OF THE NUCLOTRON-TYPE DIPOLE OF SIS100*

Irradiation of various structural elements such as superconducting cables and insulating materials of the Nuclotron-type dipole of SIS100 as a consequence of primary beam losses was calculated. In addition, attention was also turned to high-current by-pass diodes for quench protection. The Monte-Carlo particle transport code SHIELD was used to simulate the propagation of lost ions and protons together with the products of nuclear interactions in the materials of interest. The results for the proton projectiles were cross-checked using the particle transport code MARS, and a good agreement between both codes was found. The calculations have shown that the lifetime of the organic materials under irradiation are a much more restrictive limit for the tolerable level of beam particle losses than the danger of quench events in the superconductor. INTRODUCTON The SIS 100 superconducting synchrotron will be part of the GSI future facility FAIR (Facility for Antiprotons and Ion Research) [1]. It is planned to be operated with high energy proton and heavy ion beams of high intensity: • Protons: intensity 2.5•1013, accelerated from the injection energy of 2.7 GeV up to the final energy o