IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 19 Student Poster Session SUPM026 The use of beam instrumentation for real time FLASH dosimetry: experimental studies in the CLEAR facility Vilde Rieker (European Organization for Nuclear Research) . Alexander Malyzhenkov, Roberto Corsini (European Organization for Nuclear Research), Avni Aksoy (Ankara University Institute of Accelerator Technologies), Joseph Bateman (John Adams Institute), Pierre Korysko (Oxford University), Wilfrid Farabolini (Commissariat à l’Energie Atomique). Real-time dosimetry for ultra-high dose-rates (UHDR) and Very High Energy Electrons (VHEE) is a challenge which is currently being studied using the electron beam at CERN Linear Accelera- tor for Research (CLEAR). These studies are motivated by the demand for reliable dosimetry for FLASH radiotherapy. This mode of irradiation relies on UHDR, a dose rate regime where con- ventional dosimetry monitors such as ionization chambers saturate. One potential approach is the use of a calibrated beam-based dosimetry method. The existing beam instrumentation provides real-time information on charge and both transverse and longitudinal profiles of the pulses, as well as making possible a measurement of the beam Twiss parameters. In the con- text of achieving a real-time prediction of the dose deposition, this paper presents experimen- tal studies of the correlation of these parameters with the read-out of passive and dose-rate independent methods such as radiochromic films, and compares them with simulation results. SUPM027 Simulation of tune sweep slow extraction improvement via transverse emittance exchange at GSI SIS18 Jiangyan Yang , Peter Forck, Philipp Niedermayer, Rahul Singh, Stefan Sorge (GSI Helmholtzzentrum für Schwerionenforschung GmbH). Slowly extracted beams from a synchrotron have temporal fuctuations, the so-called spill micro structure. The reason is related to power supply ripples that act on the quadrupole magnets, leading to unintended tune fuctuations during extraction. The spill micro structure is infu- enced by many factors, machine parameters, such as sextupole strength, and beam quantities, such as transverse beam emittance. Reducing the beam size at the horizontal extraction plane showed an improvement of the spill micro structure, which was realized by utilizing the trans- verse emittance exchange by passing a horizontal-vertical coupling resonance at the fattop before the extraction. An experimental campaign was carried out at GSI synchrotron SIS18, and the improvement of the spill micro structure was observed. This contribution presents related simulations using two beam dynamics simulation tools, MAD-X and Xsuite, and the comparison of the two simulation platforms. The comparison to the measurement results is discussed in detail. SUPM028 The Double Drift Double Harmonic Buncher (DDHB) and Acceptance Investigations at Linac and Cyclotron Injections Ezgi Sunar (Goethe Universität Frankfurt) . Marc Syha (BEVATECH), Rudolf Tiede, Ulrich Ratzinger (Goethe Universität Frankfurt).