14th International Computational Accelerator Physics Conference

Accurate and efficient numerical modeling of beam propagation in RF accelerator cavities is inevitable for understanding and optimizing cavity characteristics in electron accelerators. Existing modeling tools are typically based on differential equation-based electromagnetic solvers, such as CST or ACE3P. These solvers require volumetric discretization of the computational domain and can...

Finite element non-overlapping Domain Decomposition Methods (DDMs) based on the Schwarz method are promising iterative techniques for addressing large-scale electromagnetic wave problems in the frequency domain. The convergence of these methods highly depends on the transmission conditions (TCs) employed between subdomains. Typically used TCs, which are based on free space open boundary...

In the field of accelerator physics, the determination of electromagnetic wakefields and their impact on accelerator performance remains a critical challenge. These wakefields, generated within the accelerator vacuum chamber by the interaction between the structure and a passing beam, significantly influence machine behavior. Characterizing these effects through beam-coupling impedance is...

The calculation of wake impedances in a resonator is difficult. The wakelength that needs to be considered extends enormously due to the high quality factors of the different resonant modes.
This makes calculating wake impedances with a wake field solver computationally very expensive.
The eigenmode solver was designed to calculate the field distribution of electromagnetic fields in resonant...

The complexity of the GSI/FAIR accelerator facility demands a high level of automation to maximize the time for physics experiments. Accelerator laboratories across the globe are investigating numerous techniques to achieve this goal, including classical optimization, Bayesian optimization (BO), and reinforcement learning. This presentation will provide an overview of recent activities in...

For the stable operation of synchrotrons, a controlled closed orbit is essential. The closed orbit correction methods are designed to keep the particle beam on the desired orbit. Information regarding the position of the beam is only accessible via the beam position monitors (BPM). It is feasible to attain zero deviation at the BPM with the conventional correction methods (e.g. SVD-based...

Slow extraction is an important mode of operation of the present GSI heavy ion synchrotron SIS18 for providing particle beams of desired intensity with longer time intervals to various experiments. One of the methods to reduce uncontrolled beam loss during slow extraction is the implementation of automated optimization of the accelerator settings.
In the present work, an algorithm based...

In recent decades, the development of high-power lasers has increased interest in the use and research of laser-accelerated ions. While offering excellent characteristics, such as high brightness, high energies, and very short pulse duration, laser-accelerated ions also pose significant challenges regarding their capture and transport due to high initial divergence and a wide energy spectrum....

The development of next-generation superconducting magnets requires advanced quench simulation tools and methods. To achieve practical simulation times and high accuracy, appropriate computational methods, such as finite elements or finite differences, are essential. Enhancements in computational efficiency can be further realized through strategic modelling assumptions, approximations,...

Fast orbit feedback systems are essential parts of fourth-generation synchrotron radiation sources. Their purpose is to keep the beam position under tight control by correcting for disturbances up to the kilohertz range. Simulating the electromagnetic fields in the fast corrector magnets at elevated frequencies is a challenging task: the laminated structure of the yokes and the low...

The efficient production and capture of muons as well as their immediate acceleration towards high particle energies are severe engineering challenges on the path towards the first 10TeV synchrotron-based muon-collider, envisioned by the European MuCol program. The required ramp rates of up to 4.5kT/s within the rapid-cycling-synchrotron can reliably be provided by normal-conducting magnets in...

Superconducting coils in accelerator magnets consist of several cables composed of multiple superconducting wires. This makes a finite element (FE) simulation discretizing all individual wires computationally very demanding. Reduced magnetic vector potential formulations avoid the explicit discretization of those wires at the cost of calculating a Biot-Savart integral in the computational...

Specialised tools are required to perform single-particle tracking simulations that include collimation systems. These tools describe the particle-matter interactions that occur when a particle impacts a collimator jaw, and provide means to pinpoint the longitudinal locations of losses. One such tool is Xcoll, a recent Python package fully integrated into the Xsuite environment - the...

The presentation will provide an overview of the capabilities of the Methodical Accelerator Design Next Generation (MAD-NG) tool. MAD-NG is a standalone, all-in-one, multiplaform tool well suited for linear and nonlinear optics design and optimisation, and has already been used in large-scale studies such as HiLumi-LHC or FCC-ee. It embeds LuaJIT, an extremely fast tracing just-in-time...

SciBmad is a new, open source software project that will provide a modern, differentiable, and full-featured toolkit for all types of accelerator physics simulations and design tasks. A set of modular, extensible packages providing all the fundamental tools needed for accelerator physics simulations is currently being developed in the Julia programming language. Julia is a relatively new...

SciBmad (formally called Bmad-Julia) is a new, open-source project to develop, in the Julia language, a set of modular packages providing the fundamental tools and methods commonly needed for accelerator simulations. This discussion is for those interested in collaboration to ask questions.

A unique particle beam dynamics simulation code, CoSyR [1], has been developed using MPI + Kokkos to exploit exascale computing and multi-GPU acceleration. This new simulation code tackles a fundamental problem of beam nonlinear dynamics from its radiation self-fields, which underpins many accelerator design issues in high brightness beam applications as well as those arising in the...

The baseline design of the ILC (International Linear Collider) positron source requires the production of an intense flux of gamma rays. In this paper we present an investigation of using the gamma ray beam of the ILC for additional applications, including nuclear physics. As a result of changing the collimator shape, as well as the parameters of the undulator magnets, we obtained spectra from...

The helical undulator-based positron source is taken into consideration for the International Linear Collider (ILC) baseline design. A multi-MeV circularly polarized photon beam is generated by passing a multi-GeV electron beam via a long superconducting helical undulator. We then direct the photon beam to a thin rotating target, which creates an electron-positron (e-e+) pair with longitudinal...

Historically, development of accelerator physics simulation programs has, for the most part, been a haphazard affair with individual people or groups developing code independent of the wider community. This process is wasteful both in time and manpower and leads to suboptimal code that is generally not interoperable with code developed elsewhere. This meeting is intended for those interested...

At the King Abdulaziz City for Science and Technology KACST, a beam line injector is being constructed to provide the multi-purpose low-energy, ELectrostAtic Storage Ring (ELASR), with the required high-quality ion beams. The injector is being equipped with a 90 degree high resolution mass analyzing selector magnet system and a new ECR ion source. The magnet system was designed to provide a...

Current research in magnet technology focuses on superconductors and technologies to achieve dipole fields in the 12-16 T range using $\mathrm{Nb_3Sn}$ wire. With their anisotropic and stress-dependent material properties, these materials require multiphysics simulations right from the start of the magnet-design process, particularly for stress management and magnet protection. Owing to the...

Magnetic measurement data is collected at various points in an accelerator magnet's life cycle. It is used, for example, to calibrate model parameters in the prototyping phase, for quality assurance and fault detection in the production phase, and for state observation and prediction during magnet operation. In all cases, the numerical model of the accelerator magnet is at the center of the...

Dielectric Laser Acceleration (DLA) is an advanced electron accelerator concept reaching gradients significantly larger than conventional RF cavities. DLAs contain dielectric nanostructures to modulate the electrical near-fields of ultrashort laser pulses. The experimental complexity of DLA experiments in the subrelativistic as well as in the relativistic regime increases with increasing...

Dielectric laser accelerators (DLA) offer the possibility to miniaturize particle accelerators by switching from metal cavities driven by radiofrequency fields to dielectric structures driven by high repetition laser pulses in the optical wavelength regime. In the last years, acceleration in combination with alternating phase focusing was shown, resulting in substantial energy gains in up to...

QuickPIC is a parallel 3D PIC code that applies the quasi-static approximation. QuickPIC can efficiently simulate both beam driven and laser driven plasma wake field accelerators with a speed that is typically 1000 times faster than the conventional PIC code without losing accuracy. QPAD is a branch of QuickPIC that applies azimuthal decomposition in cylindrical coordinates. In this work, we...

We introduce a novel and efficient methodology for simulating fluid models within the framework of plasma wakefield acceleration (PWFA). Our approach is based on the Lattice Boltzmann Method (LBM), a widely used numerical scheme in computational fluid dynamics, which we couple with a finite difference time domain method to solve the electromagnetic field equations. We outline the key features...