LINAC2026 - 33rd Linear Accelerator Conference

Development of a resonator for the measurement of the beam quadrupole moment in a high-intensity heavy-ion linac

Not scheduled

2h

Daejeon Convention Center

Poster Presentation MC4.A01: Beam diagnostics Poster Session

Speaker

Alexander Plastun (Facility for Rare Isotope Beams)

Description

Non-invasive measurements of the beam quadrupole moment provide information for the evaluation of the beam emittance and Courant-Snyder parameters for transverse matching. Such a procedure is required for each charge state of heavy ion beams at multiple locations along the FRIB linac. We are developing a quadrupole mode resonator, enabling us to extract the information about the beam quadrupole moment with much greater accuracy than non-resonant devices such as Beam Position Monitors. We have built a full-scale prototype resonator in which the quadrupole mode is excited by the 33rd harmonic of the beam frequency of 40.25 MHz. The results of RF measurements and quadrupole signal acquisition with monopole and dipole mode suppression will be reported. These studies are a necessary step towards the design and construction of the vacuum-tight resonator and its use for beam measurements.

Funding Agency

Work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under award number DE-SC0025531.