Author: Hug, F.
Paper Title Page
WEPG10 Phase and Energy Stabilization System at the S-Dalinac 638
  • T. Bahlo, C. Burandt, L.E. Jürgensen, T. Kürzeder, N. Pietralla, J. Wissmann
    TU Darmstadt, Darmstadt, Germany
  • F. Hug
    IKP, Mainz, Germany
  The Superconducting Darmstadt Linear Accelerator S‑DALINAC is a recirculating electron accelerator with a design energy of 130 MeV operating in cw. Before entering the 30 MeV main accelerator the low energetic electron beam passes both a normal-conducting injector beamline preparing the beam's 3 GHz time structure as well as a superconducting 10 MeV injector beamline for preacceleration. Since the superconducting injector accelerates on-crest while the main accelerator accelerates off-crest the beam phase is crucial for the efficiency of the acceleration process and the minimization of the energy spread. Due to thermal drifts of the normal-conducting injector cavities this injection phase varies by about 0.2 degree over a timescale of an hour. In order to compensate for these drifts, a high level phase controller has been implemented. Additionally a low-energy scraper system has been installed between the injector and main linac in order to lock both the phase and the energy spread at the linac entrance. We will present the hardware for the phase controller, the control algorithm and the scraper setup. A report on measurements showing the effect of both systems will be given.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-WEPG10  
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