IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 16 Student Poster Session The damage mechanisms and limits of superconducting accelerator magnets caused by the im- pact of high-intensity particle beams have been the subject of extensive studies at CERN in the recent years. Recently, an experiment with dedicated racetrack coils made of Nb-Ti and Nb3Sn strands was performed in CERN’s HiRadMat facility. In this paper, the design and construction of the sample coils as well as the results of their qualification before the beam impact are de- scribed. Furthermore, the experimental setup is discussed. Finally, the measurements during the beam experiment such as the beam-based alignment, the observations during the impact of 440 GeV protons on the sample coils and the obtained hotspots and temperature gradients are presented. SUPM020 Longitudinal loss of Landau damping in the CERN Super Proton Synchrotron at 200 GeV Leandro Intelisano (European Organization for Nuclear Research) . Heiko Damerau, Ivan Karpov (European Organization for Nuclear Research). Landau damping plays a crucial role in preserving single-bunch stability. In view of delivering beam to the High-luminosity LHC (HL-LHC), the Super Proton Synchrotron (SPS) must double the intensity per bunch. In this intensity range, the loss of Landau damping (LLD) in the longitu- dinal plane can pose an important performance limitation. Observation of the beam response to a rigid-bunch dipole perturbation is a common technique to study the LLD. In this contribu- tion, measurements for a single bunch at 200 GeV in a double-harmonic RF system with the higher harmonic voltage at four times the fundamental RF frequency are presented, showing the impact on Landau damping. When both RF systems are in counter-phase (bunch length- ening mode), the damping is only preserved within a specific bunch length range. Beyond the analytical estimates, the observations are moreover compared to the results from novel sta- bility criteria implemented in the semi-analytical code MELODY, as well as with macroparticle simulation in BLonD. SUPM021 Beam Loading Effects in Standing-Wave LINACs and their Implementation into the Particle Tracking Code RF-Track Javier Olivares Herrador , Andrea Latina (European Organization for Nuclear Research). Daniel Esperante, Nuria Fuster (Instituto de Física Corpuscular), Benito Gimeno-Martinez (Val Space Consortium). Accelerating technology is evolving towards compactness and high intensity. In such a scenario, beam loading effects result in significant energy losses for long trains of bunches. To address these effects, we generalised the Beam Loading module of the tracking code RF-Track to allow the study of beam loading independently of the particle type and velocity or the accelerating cavity design. This paper describes the implementation of this effect in standing wave (SW) structures. Particular attention has been devoted to guns for photoinjectors, where causality plays an important role, and one must address the non-ultrarelativistic behaviour of the emit- ted particles. Finally, we will discuss the simulation of these effects in the CLEAR facility at CERN.