Options
2003
Conference Paper
Titel
Optical fibre dosimeter for SASE FEL undulators
Abstract
Single pass Free Electron Lasers (FELs) based on selfamplified spontaneous-emission (SASE) are developed for high-brightness and short wavelength user applications. These light sources are related to short undulator periods which can be realized with permanent magnet designs. Unfortunately, the material is radiation sensitive and the undulators require a protection system. To monitor particle losses directly inside the undulator gap and to guarantee full magnetic performance for a long time, an optical fiber dosimeter has been developed and operated at the TESLA Test Facility (TTF). The dosimeter system allows online dose monitoring and beam particle loss optimisation.
Author(s)