NSCL, East Lansing, Michigan, USA
FRIB, East Lansing, USA
Northern Illinois University, DeKalb, Illinois, USA
The Reaccelerator (ReA) Facility at the National Superconducting Cyclotron Laboratory (NSCL) located at Michigan State University (MSU) offers the low-energy nuclear science community unique capabilities to explore wider ranges of nuclear reactions and the structure of exotic nuclei. Future sensitive time-of-flight experiments on ReA will require the widening of pulse separation for improved temporal resolution in single bunch detection while minimizing loss of rare isotopes and cleaning of beam decay products that might pollute measurements. In this proceedings, we present a preliminary design of a heavy ion ring that will address the task of bunch compression, bunch separation enhancement, satellite bunches elimination, cleaning of decay products, beam loss mitigation, and improvement of beam transmission.
WEA4IO01
NSCL, East Lansing, Michigan, USA
FRIB, East Lansing, USA
Magnetized beams emerging from electron cyclotron resonance (ECR) ion sources have large statistical canonical angular momentum that substantially alters the beam dynamics. This paper examines the single-particle dynamics of such beams in non-axisymmetric lattice elements. The work supports commissioning activities at the FRIB Front End by illustrating how xy projections of the components of a multi-species beam become tilted due to dipoles and quadrupoles, which can complicate charge state selection with slits. The results help guide simulations performed using the PIC code WARP to achieve better optimization of the collimation in the charge selection system (CSS). Beam statistical angular momentum also evolves in the CSS which in turn changes the x- and y-plane emittances. Possible implications of this effect on the final thermalized beam emittances delivered by the Front End are discussed.