Dresden 2013 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 24: Beschleunigerphysik V (Strahldiagnose I)
HK 24.5: Talk
Monday, March 4, 2013, 17:45–18:00, WIL-C205
Test of a Bunch Shape Monitor for high current LINACs at GSI — •Benjamin Zwicker1, Peter Forck1, Oliver Kester1,2, and Piotr Kowina1 — 1GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 2Institut für Angewandte Physik, Goethe Universität Frankfurt, Germany
Due to the efficient acceleration foreseen at the Proton-LINAC for FAIR, the longitudinal beam dynamics plays a key role for the optimization of the beam parameters. To achieve the highest current operation foreseen for the FAIR facility, a dedicated instrument for bunch shape measurement is required.
At the heavy ion LINAC at GSI, a novel scheme of non-invasive Bunch Shape Monitor has been tested. Caused by the beam impact on the residual gas, secondary electrons are liberated. These electrons are accelerated by an electrostatic field, transported through a sophisticated electrostatic energy analyzer and an rf-deflector, acting as a time-to-space converter. Finally a MCP detects the electron distribution. This Bunch Shape Monitor is able to obtain longitudinal profiles down to 400 ps with a resolution of 50 ps, corresponding to 2° of the acceleration frequency, and is able to recognize bunch distortion up to 1300 ps. Systematic parameter studies for the device were performed to demonstrate the applicability and to determine the achievable resolution.