IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 50 Student Poster Session SUPM094 First Beam Heating Studies with the Laser Heater for FLASH2020+ Dmitrii Samoilenko (University of Hamburg) . Andreas Schöps, Christoph Mahnke, Christopher Gerth, Evgeny Schneidmiller, Johann Zemella, Lucas Schaper, Lutz Winkelmann, Mikhail Yurkov, Pardis Niknejadi, Philipp Amstutz, Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Carsten Mai (TU Dortmund University), Wolfgang Hillert (Univer- sity of Hamburg). Within the framework of FLASH2020+, substantial parts of the injector of the FEL user facility FLASH have been upgraded during a nine-month shutdown in 2022 to improve the electron bunch properties in preparation for FEL operation with external seeding starting in 2025. As part of the injector upgrade, a laser heater has been installed upstream of the first bunch com- pression chicane to control the microbunching instability in the linear accelerator by a defined increase of the uncorrelated energy spread in the electron bunches. In this paper, we present first results of beam heating studies at FLASH. Measurements of the induced energy spread are compared to results obtained by particle tracking simulations. SUPM095 Lifetime without Compromise Seb Wilkes (University of Oxford) . Diffraction-limited light sources have garnered significant interest -- yet the smaller equilibrium size of their electron bunches also reduces the beam-lifetime. One remedy is to vertically excite the electron beam, for instance using a Transverse Multi Bunch Feedback (TMBF) system. Previ- ous work* has demonstrated that this approach can safely increase the vertical emittance, thus beam-lifetime. However, not all operational vertical emittances are created equal. Operating a TMBF at frequencies near resonances can generate large coherent dipolar motion that re- sults in an enlarged apparent photon-source. In this work, we present a methodology, justified with theoretical reasoning and simulation, that finds the optimal combination of frequency and kick strength that satisfies both the operational requirements and the beamline interests. The methodology is then demonstrated for the Diamond-II lattice, including short-range impedance effects. SUPM096 Swift Heavy Ions Induced Structural Modifications in Tungsten Carbide (WC) Thin Films Devesh Avasthi (Inter University Accelerator Centre), Ratnesh Pandey, SHRISTI BIST (University of Petroleum and Energy Studies) . Radiation resistance of materials is an important area of research, relevant to nuclear reactor technology. Various challenges are associated with this research; one of which is the selection of radiation resistant material for the plasma facing wall of the reactor due to its harsh operat- ing environment.* Recent studies reveal that WC has the potential to be developed as radiation resistant material.** To explore this possibility, WC thin films synthesized using RF Magnetron