IPAC'23 - Student Poster Session Guide

IPAC’23 / STUDENT POSTER SESSION GUIDE 26 Student Poster Session to sustain such ultra-high gradients. In particular, due to their cylindrical symmetry, multi-nm-a- perture targets, made of CNT bundles or arrays may facilitate particle channelling through the crystalline structure. In this work, a two-bunch, driver-and-witness configuration is proposed to demonstrate the po- tential to achieve particle acceleration as the bunches propagate along a CNT-array structure. Particle-in-cell simulations have been performed using the VSIM code in a 2D Cartesian geome- try to study the acceleration of the second (witness) bunch caused by the wakefield driven by the first (driver) bunch. The effective plasma-density approach was adopted to estimate the wakefield wavelength, whi- ch was used to identify the ideal separation between the two bunches, aiming to optimize the witness-bunch acceleration and focusing. Simulation results show the high acceleration gradient obtained, and the energy transfer from the driver to the witness bunch. SUPM042 Hydrodynamic Model for Particle Beam-Driven Wakefield in Carbon Nanotubes Pablo Martín-Luna (Instituto de Física Corpuscular) . Alexandre Bonatto (Universidade Federal de Ciências da Saúde de Porto Alegre), Javier Resta-Lopez, Moises Barbera Ramos (Instituto Universitario de Ciencia de los Materiales). Charged particles moving through a carbon nanotube may be used to excite electromagnetic modes in the electron gas produced in the cylindrical graphene shell that makes up a nanotube wall. This effect has recently been proposed as a potential novel method of short-wavelen- gth-high-gradient particle acceleration. In this contribution, the existing theory based on a line- arised hydrodynamic model for a localised point-charge propagating in a single wall nanotube (SWNT) is reviewed. In this model, the electron gas is treated as a plasma with additional con- tributions to the fuid momentum equation from specific solid-state properties of the gas. The governing set of differential equations is formed by the continuity and momentum equations for the involved species. These equations are then coupled by Maxwell’s equations. The diffe- rential equation system is solved applying a modified Fourier-Bessel transform. An analysis has been realised to determine the plasma modes able to excite a longitudinal electrical wakefield component in the SWNT to accelerate test charges. Numerical results are obtained showing the infuence of the damping factor, the velocity of the driver, the nanotube radius, and the particle position on the excited wakefields. A discussion is presented on the suitability and possible limitations of using this method for modelling CNT-based particle acceleration. SUPM043 Employing Octupole magnets for nonlinear optimization of Iranian Light Source Facility storage ring Kowthar Noori , Seyed Masoud Jazayeri (Iran University of Science and Technology), Esmaeil Ahmadi (Iranian Light Source Facility).