IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 28 Student Poster Session geometrical configurations are tested, including capillaries with different channel shapes and arrangement of inlets positions for the gas injection. Such configurations are designed in order to enhance the uniformity of the plasma density distribution along the plasma channel, which is necessary to improve particle beam acceleration. Plasma sources are characterized by means of the spectroscopic technique based on the Stark broadening method, which allows to measu- re the evolution of the plasma density profile along the channel. In addition, the CFD software OpenFoam is used to simulate the dynamics of the neutral gas during the filling of the capillary. SUPM046 Dual Scattering Foil Installation at CLEAR Cameron Robertson (John Adams Institute) . Alexander Malyzhenkov, Andrea Latina, Manjit Dosanjh, Roberto Corsini, Vilde Rieker (European Or- ganization for Nuclear Research), Avni Aksoy (Ankara University Institute of Accelerator Technologies), Joseph Bateman (John Adams Institute), Pierre Korysko (Oxford University), Wilfrid Farabolini (Com- missariat à l’Energie Atomique). The CLEAR facility at CERN allows users to receive an electron beam with energy up to 200 MeV, allowing fexibility in intensity, beam size and bunch structures. Separate from the main CERN accelerator complex, it is capable of hosting numerous experiments with rapid installations at two test stands. It would be highly desirable for many applications, but particularly those of a medical nature, to be able to provide a ‘fat’ beam at CLEAR, with a uniform intensity distribution over a significant component of its transverse dimensions. Over the winter shutdown 2022-2023, a dual-scattering system has been installed in the CLEAR beamline to generate such a beam distribution. It was placed several metres upstream of the beamline end to reduce X-ray contamination in the fattened beam and increase total transmis- sion of the beam. Studies on the fattened beam composition in terms of structure and dose were carried out, utilising a dipole directly upstream of the in-air test stand to separate the elec- tron and X-ray components for analysis. These experimental verifications were compared with multiple scattering theory and Monte-Carlo beam matter interaction simulations in TOPAS. SUPM047 A Novel Fibre Optic Monitor for VHEE UHDR Beam Monitoring: First Tests at CLEAR Joseph Bateman (John Adams Institute) . Emma Buchanan (European Organization for Nuclear Research (CERN)), Inaki Ortega Ruiz, Manjit Dosanjh, Roberto Corsini (European Organization for Nuclear Research), Alexander Gerbershagen (Particle Therapy Research Center). Beam monitoring for Ultra High Dose Rate (UHDR) radiation therapy using pulsed beams, i.e. Very High Energy Electrons (VHEE), is a major challenge. The lower pulse repetition of VHEE beams means a larger dose-per-pulse is necessary to achieve the mean dose rates required for UHDR therapy (so-called FLASH). The currently used transmission ion chambers suffer drastic recombination effects under these conditions. A proposed detector consisting of a 2D array