Stabilization of transverse beam parameters at the S-DALINAC

Electron-induced fission reactions will be deployed and studied at the S-DALINAC. For these experiments, it is desirable to limit the transverse displacements of the electron beam due to drifts and distortions to below 200 μ m. Prior to the present work, this requirement was not met at the S-DALINAC. A total of three systems have been developed, implemented and interconnected to monitor and improve the transverse beam stability: (i) The beam position monitoring system based on high-speed cameras provides transverse beam parameters with micrometer resolution at a kilohertz rate. (ii) A newly designed compensator device mitigates longitudinal and transverse perturbations from the mains frequency on the electron beam. (iii) Finally, an active beam stabilization system ensures high beam stability at the intended interaction point of the electron beam and the fission target. The design and implementation of these systems as well as performance measurements will be presented in this paper. • Transverse beam position tracked via high-speed imaging with micrometer precision. • Beam perturbations from power grid are minimized using a novel compensator. • OTR-based feedback system ensures beam stability at target interaction point.