IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 47 Student Poster Session SUPM088 Multipurpose Vacuum Accident Scenarios (MuVacAS) Prototype for the IFMIF-DONES Linear Accelerator Anderson Sabogal (Universidad de Granada) . Claudio Torregrosa, Daniel Rodríguez (Universidad de Granada), Angel Ibarra, David Jimenez-Rey, Francisco Martin-Fuertes (Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas), Ivan Podadera (Consorcio IFMIF-DONES España), Marcelo Juni Ferreira (European Spallation Source ERIC), Philippe Cara (Fusion for Energy). IFMIF-DONES* is a key device in the EUROfusion roadmap for studying and licensing materials for future fusion reactors. It will be a unique neutron fusion-like irradiation facility equipped with a linear particle accelerator impinging an intense deuteron beam (125 mA, 40 MeV) onto a liquid lithium target. In terms of safety analysis of the facility, relevant accidental scenarios are related to the technical impossibility of having a separation window between the liquid lithium target chamber and the accelerator vacuum chambers. In case of Loss of Vacuum Acci- dent (LOVA), such as a sudden air/water inrush or leakage in the accelerator or target vacuum chambers, the beam duct could serve as a transport line and lead to air/water contact with liquid lithium, with the risk of exothermic reaction. The use of Fast Isolation Valves (70-100 ms closing time) is envisaged as mitigation mechanism for these events. The MuVacAS Prototype is an experimental setup to study in detail these scenarios and validate the Safety Credited mit- igation requirements. For this purpose, it recreates the last 30 meters of the accelerator and target vacuum chambers and, it is equipped with dedicated instrumentation and modules for simulating LOVAs. This contribution presents an overview of the experimental setup together with preliminary numerical simulation of these accidental events. SUPM089 Dynamic Aperture Studies for Vertical Fixed Field Accelerators Marion Vanwelde (Universite libre de Bruxelles) . Cédric Hernalsteens (European Organization for Nuclear Research), Eliott Ramoisiaux, Eustache Gnacadja, Nicolas Pauly, Robin Tesse (Universite libre de Bruxelles). Vertical orbit excursion Fixed Field Accelerators (vFFAs) feature highly non-linear magnetic fields and strong transverse motion coupling. The detailed study of their Dynamic Aperture (DA) re- quires computation codes allowing long-term tracking and advanced analysis tools to take the transverse motion linear and non-linear coupling into account. This coupling completely trans- forms the beam dynamics compared to a linear uncoupled motion, and an explicit definition of the DA is needed to characterize the performance and limitations of these lattices. A complete study of the DA in the 4D phase space in highly non-linear and strongly coupled machines must give a measure of the stability domain but also means to assess the operating performance in the physical coupled space. This work presents a complete set of methods to perform such detailed analysis. These methods were explored and compared to compute and characterize the DA of an example vFFA lattice. The whole procedure can be further applied to evaluate DA using realistic models of the magnetic fields, including fringe fields and errors.