| Paper | Title | Other Keywords | Page |
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| MOP008 | Reducing the Energy Spread of Recirculating Linac by Non-isochronous Beam Dynamics | electron, linac, quadrupole, cavity | 64 |
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The Superconducting Linear Accelerator S-DALINAC at the University of Darmstadt (Germany) is a recirculating Linac with two recirculations. Currently acceleration in the Linac section is done on crest of the accelerating field. The recirculation path is operated achromatic and isochronous. In this recirculation scheme the energy spread of the resulting beam in the ideal case is determined by the electron bunch length. Taking into account the stability of the RF system the energy spread increases drastically. In this work we will present a new non-isochronous recirculation scheme which helps canceling out these errors from the rf-control. This scheme uses longitudinal dispersion in the recirculation pathes and an acceleration off-crest with a certain phase with respect to the maximum. We will present beam dynamic calculations which show the usability of this system even in a Linac with only two recirculations and first experimental results |
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| THP084 | Further Development of the V-Code for Recirculating Linear Accelerator Simulations | simulation, linac, dipole, cavity | 938 |
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The recirculating Superconducting Darmstadt Linear Accelerator S-DALINAC, installed at the institute for nuclear physics (IKP) at the TU Darmstadt, consist of a 10 MeV Injector and a 40 MeV linac. Utilizing two recirculations, the linac could be used up to three times, leading to a maximal energy for nuclear physics experiments of 130 MeV. This recirculating layout makes it pretty complicated to find an accurate setup for the various beam line elements, especially to match the path length of the recirculated beam with the phase of the accelerating fields. Fast online beam dynamics simulations can advantageously assist the operators because they provide a more detailed insight into the actual machine status. In this paper further developments of the moment based simulation tool V-Code enabling it to simulate recirculating machines are presented together with simulation results. |