Dortmund 2021 – wissenschaftliches Programm

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 1: Beam Dynamics

AKBP 1.1: Vortrag

Montag, 15. März 2021, 16:00–16:15, AKBPa

Beam Dynamics Simulations for the Multi-Turn Energy Recovery Mode at the S-DALINAC* — •Felix Schließmann, Michaela Arnold, and Norbert Pietralla — Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany

In August 2017, the electron accelerator S-DALINAC [1] at TU Darmstadt was initially operated in the so-called energy recovery mode using one recirculation beamline [2]. Here, once accelerated electrons are guided back to the cavities with an induced phase shift of approximately 180°. In this way, the electrons are decelerated and will restore energy to the cavities, which can then be used to accelerate subsequent electrons.

In the upcoming beam time, the S-DALINAC shall be operated in energy recovery mode using two recirculation beamlines, what involves further challenges: on the one hand, two beams are now superimposed in a recirculation beamline and four beams are superimposed in the linac, and on the other hand, the phase slippages during the linac passes reach such a critical level that they have to be determined in advance and compensated by suitable amplitude and phase settings.

This contribution addresses the necessary beam dynamics simulations in order to realize this multi-turn energy recovery mode.

[1] N. Pietralla, Nuclear Physics News, Vol. 28, No. 2, 4 (2018).

[2] M. Arnold et al., Phys. Rev. Accel. Beams 23, 020101 (2020).

*Work supported by BMBF through grant No. 05H18RDRB2, DFG through GRK 2128 and by the state of Hesse through the LOEWE Research Cluster Nuclear Photonics.