| |
The operation of the European X-Ray Free Electron Laser puts stringent demands on the peak current, transverse slice emittance and slice energy spread of the driving electron beam. For monitoring and stabilizing these parameters, dedicated diagnostic beamlines are foreseen downstream of two magnetic chicanes for longitudinal bunch compression. Each diagnostic section comprises a transverse deflecting structure, which deflects electrons horizontally as a function of time so that the particle distribution in the longitudinal-vertical plane can be imaged with view screens. Usage of several screens and an appropriate accelerator optics allow for the measurement of the vertical slice emittance. By dispersing the beam vertically as a function of energy using a dipole magnet, the energy distribution along a bunch can be measured with high accuracy and single-bunch resolution. In this paper we give an overview on the layout of the diagnostic sections. The accuracy and time resolution of such measurements are discussed on the basis of numerical simulations.
|
|