FRIB, East Lansing, Michigan, USA
FRIB is a heavy ion linac facility to accelerate all stable ions to the energy of 200 MeV/u with the beam power of 400 kW, which is under construction at Michigan State University in USA. FRIB driver linac is a beam power frontier accelerator aiming to realize two orders of magnitude higher beam power than existing facilities. It consists of more than 300 low-beta superconducting cavities with unique folded layout to fit into the existing campus with innovative features including multi charge state acceleration. In this talk, we overview accelerator physics challenges in FRIB driver linac with highlight on recent progresses and activities preparing for the coming beam commissioning.
TUPM2X01
FRIB, East Lansing, Michigan, USA
BNL, Upton, Long Island, New York, USA
MSU, East Lansing, Michigan, USA
ANL, Argonne, Illinois, USA
The Facility for Rare Isotope Beams being built at Michigan State University includes a high intensity superconducting radio frequency heavy ion linac. This driver linac will accelerate ions up to uranium to energies above 200 MeV/u at 400 kW beam power. The design includes a charge stripper at energies between 16 and 20 MeV/u. The estimated power deposition in a conventional carbon foil stripper would require power densities of the order of 30 MW/cm3. We are developing two types of charge strippers with self-replenishing fluids, a liquid (lithium) and a gas (helium) version. We present in this talk a description of the R&D, the expected pros and cons of each method, and the status of the construction of both systems.
TUAM5Y01
FRIB, East Lansing, Michigan, USA
we will report the recent beam simulation studies on the FRIB driver linac.
FRIB, East Lansing, Michigan, USA
GSI, Darmstadt, Germany
KEK/JAEA, Ibaraki-Ken, Japan
As a multi-charge-state, heavy-ion, superconducting accelerator with a folded geometry, FRIB faces unique beam loss detection and collimation challenges to protect superconducting cavities from beam-induced damage. Collimation is especially important in the Folding Segment 1 where the multiple charge states are created by a charge stripper and selected by a charge selector. The transported ECR contaminants, interaction with the residual gas, and beam halo due to stripping could induced significant beam losses in this region. We have simulated the potential beam losses and planned collimation accordingly. A layered loss detection network is also specifically designed to visualize potential blind zones and to meet the stringent requirements on loss detection. The related sub-systems are designed and procured and are introduced in this paper.