All the components are located inside the storage ring tunnel where they are exposed to high radiation levels during operation. (esrf.eu)
That allows for high radiation doses in the tumor, while the nearby important organs (e.g. eyes, brain surrounding the tumor) receive much lower doses of radiation than the tumor. (cvm.ncsu.edu)
These devices can also function at higher operating temperatures and in high radiation environments such as space. (sandia.gov)