University of Liverpool
Beam Stability and Life Time in Low Energy Storage Rings
ELENA at CERN’s AD and FLAIR will provide cooled beams of antiprotons at lower energies than currently achievable anywhere in the world. It will be crucial to have detailed knowledge about the achievable stability of the beam in the storage ring and the expected beam life times. Existing low energy storage rings, operating at keV beam energies, found strong limitations on beam intensity and reduced life time in experimental studies. The nature of these effects had not been fully understood for a very long time and only recently causes of these limits to beam current and life time were identified and reproduced in simulations.
The Fellow developed realistic models for beam transport, storage, deceleration and cooling from storage rings through beam lines to experiments. This will allow to investigate the effects impacting on beam stability and emittance. They will also help establish realistic models of beam storage and cooling. Using data collected during measurements with Low Energy Ion Ring (LEIR), the Fellow developed cooling maps describing how the cooling efficiency of the electron cooler varies with increasing distance from the beam centre.
Further data analysis provided elements to accurately simulate the cooling process that can be expected for ELENA. The simulation tools developed by the Fellow enabled start-to-end simulations of antiproton pulses through electrostatic low energy beam lines.