Speaker
Description
Indirect space charge (the electric field generated by the mirror currents induced in the conductive surroundings) can drive resonances in synchrotrons. However, modelling this effect has historically been computationally expensive.
This contribution presents 2d closed-form solutions for transverse indirect space charge from Gaussian beams in various conductive geometries.
These formulas enable fast, frozen, indirect space charge models to be integrated into particle tracking simulations.
Applied to the ISIS RCS, these models predict additional resonance lines driven by indirect space charge that are fundamentally absent in models incorporating only direct space charge. Capturing this physics is thus critical for predicting resonance-free, low-loss working points for accelerators operating near the space charge limit.