MULTI-BUNCH BEAM DYNAMICS STUDIES FOR THE EUROPEAN XFEL
N. Baboi
Abstract
N. Baboi
Abstract
In the X-ray free electron laser (XFEL) planned to be built at DESY the acceleration of the electron bunches will be made by 9-cell superconducting cavities. These cavities have been initially developed within the TESLA (TeV Enstudy. The impact of the higher order modes (HOM) has been shown to be within the acceptable beam dynamics limits for the collider. For the XFEL the dynamics is relaxed from the point of view of multi-bunch effects (e.g. lower bunch charge, higher bunch emittance). However the lower energy and different time structure of the beam make the study of the HOM effects in the XFEL linac desirable. Multi-bunch beam dynamics simulations have been made. The results of the HOM measurements at the TESLA Test Facility are used. Several options for the beam structure and energy are studied.
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In the X-ray free electron laser (XFEL) planned to be built at DESY the acceleration of the electron bunches will be made by 9-cell superconducting cavities. These cavities have been initially developed within the TESLA (TeV Enstudy. The impact of the higher order modes (HOM) has been shown to be within the acceptable beam dynamics limits for the collider. For the XFEL the dynamics is relaxed from the point of view of multi-bunch effects (e.g. lower bunch charge, higher bunch emittance). However the lower energy and different time structure of the beam make the study of the HOM effects in the XFEL linac desirable. Multi-bunch beam dynamics simulations have been made. The results of the HOM measurements at the TESLA Test Facility are used. Several options for the beam structure and energy are studied.
Key concepts: DESY, Physics, Bunches, Free-electron laser, Beam (structure), Linear particle accelerator, Thermal emittance, Collider