LINAC2026 - 33rd Linear Accelerator Conference

Feedback systems to mitigate beam losses due to instabilities of liquid lithium film stripper in a high-power heavy ion linac

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC4.A01: Beam diagnostics Poster Session

Speaker

Scott Cogan (Facility for Rare Isotope Beams)

Description

At FRIB, we have developed three feedback systems to stabilize the operation of the liquid lithium film used as a charge stripper. Two relatively slow feedback systems maintain the beam energy, the energy loss in the stripper, and the time of flight to the following RF cavity unchanged. The third system blocks the beam with the fast chopper during periods of fast instabilities, changing the film thickness over a timescale of 300 microseconds. The latter substantially reduced Machine Protection System trips due to beam losses on a 150-microsecond time scale. The positive impact of feedback systems on the high-power operation of the linac will be presented.