Conveners
Parallel talks: Parallel session V (Simpkins Lee)
- David Kelliher (ISIS)
Parallel talks: Parallel session IV (Martin Wood Lecture Theatre)
- There are no conveners in this block
Particle in-cell (PIC) codes as a means of simulating accelerator beams become resource intensive when simulation of the fine structure of a beam is necessary. We propose an alternative scheme wherein multiple macro-particles are replaced with super macro-particles; computational objects which encode not only the position and velocity data of a group of particles, but also some of the moments...
RF cavity breakdowns present a limitation in high-gradient accelerators. Precise diagnostics are required to identify these breakdown events and potentially predict and mitigate them. These functions are critical for ensuring operational stability and preventing damage to the cavities from these events. This contribution presents the use of an optical fiber beam loss monitor, positioned along...
The design of the Diamond II Booster and Storage ring include magnets with hard edge model separations of as little as 75 mm. After the inclusion of differing iron yoke lengths and coil overhang, the actual distance between magnet extremities is much lower. With such a small separation between magnets, it is crucial to study, simulate and measure crosstalk effects arising between magnets. This...
The design performance of the 3.5 GeV Diamond-II low-emittance electron storage ring has been studied as a function of the linear and nonlinear lattice tuning parameters. A Multi-Objective Genetic Algorithm (MOGA) has been implemented and refined to optimise both the beam lifetime and the injection efficiency for off-axis injection. The simulations have been run on 5 machine error seeds,...
Free Electron Lasers (FELs) are novel light sources capable of generating ultrashort, femtosecond-duration pulses via electron oscillations in electromagnetic fields. A defining advantage of FELs is that the radiation wavelength is inversely proportional to the square of the electron beam energy, allowing continuous and tunable access across the electromagnetic spectrum. At electron energies...
FLASH proton therapy, enabled by ultra-high dose rates, offers enhanced tumour control with reduced damage to healthy tissue. Laser-driven proton sources are a promising compact solution, but their intense, pulsed beams pose challenges for conventional beam diagnostics. This work presents a minimally invasive real time diagnostics of such beams using gas-jet-based ionization profile monitor....
Development of an optical fibre-based beam loss monitor (OBLM) is in progress at the Cockcroft Institute, UK. It obtains the beam loss location via time-of-flight analysis of Cherenkov radiation (CR) produced in optical fibres by relativistic particle showers from beam loss events.
The OBLM system has shown capability to operate successfully in varied and challenging accelerator and radiation...
Vacuum vessels of the Diamond-II storage ring feature metallic coatings which cause a resonator-like peak in the longitudinal impedance. This work demonstrates how different parameters of non-evaporable getter (NEG) coatings can increase momentum-spread growth. The first key insight of this study: The spread of the coating-layer thickness amongst vacuum vessels results in significantly reduced...
