Benoit Bolzon

Sub-micrometer transverse beam size diagnostics using optical transition radiation

Optical transition radiation (OTR) arising when a relativistic charged particle crosses a boundary between two media with different optical properties is widely used as a tool for diagnostics of particle beams in modern accelerator facilities. The resolution of the beam profile monitors based on OTR depends on different effects of the optical system such as spherical and chromatic aberrations and diffraction. In this paper we present a systematic study of the different optical effects influencing the OTR beam profile monitor resolution. Obtained results have shown that such monitors can be used for sub-micrometer beam profile diagnostics. Further improvements and studies of the monitor are discussed.

Zemax Simulations of Transition and Diffraction Radiation

Charged particle beam diagnostics is a key task in modern and future accelerator installations. The diagnostic tools are practically the eyes of the operators. Precision and resolution of the diagnostic equipment are crucial to define the performance. Transition and Diffraction Radiation (TR and DR) are widely used for electron beam parameter monitoring. However, the precision and resolution of those devices are determined by how well the production, transportation and detection of these phenomena are understood. This paper reports on initial simulations of TR and DR spatial characteristics. A good consistency with theory is demonstrated. Also, optical system alignment issues are discussed.