Sütterlin, Daniel; Erni, Daniel; Dehler, Micha; Jäckel, Heinz; Sigg, Hans; Schlott, Volker:

An analytic formalism for the emission of coherent transition radiation from an oblique finite thin metallic target screen

In: Nuclear instruments & methods in physics research : a journal on accelerators, instrumentation and techniques applied to research in nuclear and atomic physics, materials science and related fields in physics, Section B, Beam interactions with materials and atoms, Jg. 264 (2007) ; Nr. 2, S. 362-370
ISSN: 0168-583X
Zeitschriftenaufsatz / Fach: Elektrotechnik
Long-wavelength coherent transition radiation is commonly used in electron beam diagnostics for the determination of bunch lengths. Typically the spectrum of coherent transition radiation for a short bunch accelerator is settled in the low or sub-THz regime. Hereby, we present a theoretical model based on physical optical techniques in order to calculate emission characteristics for transition radiation, for both the radiating near-field and the far-field. This approach yields analytic solutions for the emitted electromagnetic fields without the need to solve integral equations. The simulated intensity distribution is compared with measurements showing good agreement.