Space Charge 2026, 7th ICFA BD Mini-workshop

Observations of mismatch-driven halo in 2.5 MeV H- beam at the SNS Beam Test Facility

2 Oct 2026, 13:50

15m

Denys Wilkinson Building, Dennis Sciama Lecture Theatre (Oxford University, Physics Department)

A-4. Beam Loss and Halo Dynamics A

Speaker

Mr Trent Thompson (University of Tennessee, Knoxville)

Description

The goal of on-going research at the SNS Beam Test Facility is to improve modeling and understanding of halo formation in the early stages of the SNS linac. The experiment at the BTF includes two phase space measurement stations separated by 9.5 FODO cells. By controlling beam mismatch in the FODO section, we systematically explore the dependence of beam halo formation on the mismatch amplitude. This talk will describe observational studies of halo under various conditions in the BTF, using a high-dynamic-range phase space measurement that extends to six orders of magnitude below the core density.