Frankfurt 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 46: Poster
HK 46.44: Poster
Thursday, March 20, 2014, 16:00–18:00, HZ Poster
Test of a non-invasive Bunch Shape Monitor at the GSI high current LINAC — •Benjamin Zwicker1,2, Christoph Dorn1, Peter Forck1,2, Oliver Kester1,2, and Piotr Kowina1 — 1GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 2Institut für Angewandte Physik, Goethe Universität Frankfurt, Germany
At the heavy ion LINAC at GSI, a novel scheme of non-invasive Bunch Shape Monitor has been tested with several ion beams at 11.4 MeV/u. 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. For the applied beam settings this Bunch Shape Monitor is able to obtain longitudinal profiles down to 400 ps with a resolution of 50 ps, corresponding to 2 degree of the 36 MHz acceleration frequency. During a long shutdown period for the GSI accelerators in 2013, the monitor underwent a general technical retrofit: Influence of the beam has been significantly reduced, due enhanced electrodes, new apertures have been installed to decrease electron scattering, sophisticated stepping motors will allow better image properties, a MCP shielding plate will prevent high background.
Together with these improvements the achievements of the monitor are discussed.