Preliminary Results of the 2023 International Fermilab Booster Studies

TL;DR

This paper presents preliminary findings from Fermilab Booster studies focusing on beam loss, emittance growth, resonance effects, and instabilities under various conditions, using experimental measurements and simulations.

Contribution

It provides new experimental data and analysis on beam dynamics, resonance correction, and instabilities in the Fermilab Booster at high intensities.

Findings

Beam loss and emittance growth vary with intensity and tune settings.

Vertical half-integer resonance effects are characterized and correction methods tested.

Synchro-betatron instabilities are observed during transition crossing under space-charge conditions.

Abstract

An overview is given of the methods and preliminary results from dedicated beam studies on three topics conducted over five days in July 2023. In the first study, the Fermilab Booster magnets were held constant at magnetic fields corresponding to the injection energy. The beam loss and emittance growth were observed under varying intensity, tunes, and sextupole resonances. The corresponding beam conditions were also simulated with the MADX-SC code~\cite{Schmidt:2644660}. In the second study, measurements of the vertical half-integer resonance and correction methods are conducted for high-intensity beams ramping in the Booster. Finally, syncho-betatron instabilities are observed during transition-crossing in the Booster under strong space-charge conditions.