Speaker
Description
A permanent magnet is one of important materials which are used in particle accelerator and its applications have increased recently for compact structure close to particle beam. So the damage due to beam or secondary radiations is more important. The demagnetization phenomena founded at several synchrotron radiation sources and studies to understand its characteristics and to reduce the damage impact are presented as a lesson-learned. Expected demagnetization condition at hadron accelerator is also discussed.
A X-ray free electron laser (XFEL), especially, highly intensive hard X-ray, were launched at a few countries since 2009. A few mJ of photons within a few tens femto-second made special radiation damage issue which was not discussed before in the view of radiation protection. First the principle and facility generating X-ray free electron laser are introduced. The damage phenomena founded at several XFEL facilities and studies to understand its characteristics are presented. The radiation protection design against XFEL and application practice using damage property are given to students. Several damage phenomena recorded in light source are also introduced.
