IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 30 Student Poster Session In the KIT storage ring KARA (Karlsruhe Research Accelerator), two parallel plates with periodic rectangular corrugations are planned to be installed. These plates will be used for impedance manipulation to study and eventually control the electron beam dynamics and the emitted co- herent synchrotron radiation (CSR). In this contribution, we present simulation results showing the infuence of different corrugated structures on the longitudinal beam dynamics and how this infuence depends on the machine settings in the low momentum compaction regime, which are related to the bunch length changes. SUPM050 Beam Trajectory Control with Lattice-Agnostic Reinforcement Learning Chenran Xu (Karlsruhe Institute of Technology) . Andrea Santamaria Garcia, Anke-Susanne Mueller, Erik Bründermann (Karlsruhe Institute of Tech- nology), Jan Kaiser (Deutsches Elektronen-Synchrotron). In recent work, it has been shown that reinforcement learning (RL) is capable of outperform- ing existing methods on accelerator tuning tasks. However, RL algorithms are difficult and time-consuming to train and currently need to be retrained for every single task. This makes fast deployment in operation difficult and hinders collaborative efforts in this research area. At the same time, modern accelerators often reuse certain structures within or across facil- ities such as transport lines consisting of several magnets, leading to similar tuning tasks. In this contribution, we use different methods, such as domain randomization, to allow an agent trained in simulation to easily be deployed for a group of similar tasks. Preliminary results show that this training method is transferable and allows the RL agent to control the beam trajectory at similar lattice sections of two different real linear accelerators. We expect that future work in this direction will enable faster deployment of learning-based tuning routines, and lead to- wards the ultimate goal of autonomous operation of accelerator systems and transfer of RL methods to most accelerators. SUPM051 Control of Electron Injection in LWFA with a Laser-ablated Aluminum Plasma by inserting a thin-layer of different metal. Hyeon Woo Lee (Korea University Sejong Campus) . Sang Yun Shin (Chung-Ang University), Seong Hee Park (Korea University Sejong Campus). Laser wakefield acceleration (LWFA) using metal targets has been developed for high-vacuum and high-repetition rate operations compare to the gas targets[1-2]. However, the ionization effect due to high intensity fs laser should be considered as propagating through the plasma and the difference of LWFA mechanisms between aluminum plasma and helium plasma has been investigated with the simulation. The partially ionized aluminum ions are ionized to higher charge state up to Al11+ as the main laser is propagating through the metallic plasma. As com- paring to helium plasma case, a lot of electrons are injected into the wake cavity even at lower laser power and the energy of accelerated electrons are decreased. By increasing the plasma density, the charge and the oscillating amplitude of injected electrons can be optimized for betatron radiation. We proposed a structured metal target using a thin Ti or Cu wire in aluminum to improve the