IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 25 Student Poster Session The Lanzhou Light Ion Cancer Therapy Facility (LLICTF) is a compact medical accelerator cur- rently under construction. It is designed to treat cancer using a 230MeV, 30mA H+ beam and a 85MeV/u, 1mA 3He2+ beam. The facility comprises two ion sources, a low-energy beam-trans- port (LEBT), a Radio Frequency Quadrupole (RFQ), a medium-energy beam-transport (MEBT), and the main ring accelerating structure. Due to the presence of two ion sources, it is necessary to introduce a dipole magnet which is symmetrically focused as much as possible to meet the symmetrical focusing requirements of the LEBT beam. Therefore, a gradient dipole magnet has been designed to achieve this symmetrical focusing. This paper discusses the theoretical and simulated symmetric focusing of the gradient dipole magnet. It also analyzes the effect of fringe fields and space charge. Additionally, the paper presents the results of the model design with CST and the multi-particle simulation results with TraceWin. SUPM040 Study of Backward Traveling Wave Accelerating Structure for the Acceleration of Protons from 30 MeV to 230 MeV wei Qin (Institute of Modern Physics, Chinese Academy of Sciences) . S-band high-gradient accelerating structures were proposed to accelerate protons from 30MeV to 230MeV for a compact therapy Linac in IMP. A backward traveling wave Linac with gradient of more than 40 MV/m for the whole accelerating range was developed, with first two tanks operated at the first negative spatial harmonic for β<0.4 to avoid the distance between the accelerating gaps too small to get lower RF breakdown rate. In this paper, A new-shaped back- ward traveling wave accelerating structure with reduced coupling holes and thermal stress was developed, along with a novel cooling channel design, which allow the cooling water fow in the middle of the disk, thus make it possible for higher duty cycle and longer RF pulse operation. It provides a wider application scenario for the backward traveling wave accelerating structure. This new-shaped structure could be realized by the 3D printing technology and the first power prototype is now under construction. The research of high gradient accelerating structure is consistent with the trend of linear accelerator technology (compact, fexible and economical). Design and optimization of the linac and the status of the prototype cavity will be discussed in this paper. SUPM041 Driver-Witness Configuration in CNT Array-Based Acceleration Moises Barbera Ramos (Instituto Universitario de Ciencia de los Materiales) . Alexandre Bonatto (Universidade Federal de Ciências da Saúde de Porto Alegre), Cristian Bontoiu, Oznur Apsimon (The University of Liverpool), Guoxing Xia (Cockcroft Institute), Javier Resta-Lopez (Instituto Universitario de Ciencia de los Materiales), Pablo Martín-Luna (Instituto de Física Corpuscu- lar), Volodymyr Rodin (CERN). Solid-state plasma wakefield acceleration might be an alternative to accelerate particles with ultra-high accelerating gradients, in the order of TV/m. In addition, due to their thermodynamic properties, 2D carbon-based materials, such as graphene layers and/or carbon nanotubes (CNT) are good candidates to be used as the media