NSCL, East Lansing, Michigan, USA
FRIB, East Lansing, Michigan, USA
This paper will summarize the systems engineering techniques utilized to translate the FRIB accelerator physics lattice file to actual three dimensional CAD geometry for linac components. An automated approach of using the accelerator physics lattice database used for optics and particle simulation has been implemented to generate data points used to position the technical 3-dimensional CAD geometry. This coordinated method ensures consistency between the technical and scientific design domains throughout the project design phases. The FRIB configuration management used to control lattice and CAD model revisions is also discussed. In addition, the paper discusses fiducialization plans and tolerance stack up analysis to meet positional requirements for FRIB cryomodules, diagnostics, and the beam delivery magnet systems.
FRIB, East Lansing, Michigan, USA
The FRIB Front End will provide beams of stable ions with a mass up to uranium at a beam energy of 500 keV/u and intensity required to achieve a power of 400 kW on the fragmentation target. In this paper, we describe progress with the design and construction of the Front End and its systems.
FRIB, East Lansing, USA
JLAB, Newport News, Virginia, USA
INFN/LNL, Legnaro (PD), Italy
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
ANL, Argonne, USA
The Facility for Rare Isotope Beams (FRIB) is based on a continuous-wave superconducting heavy ion linac to accelerate all the stable isotopes to above 200 MeV/u with a beam power of up to 400 kW. At an average beam power approximately two-to-three orders-of-magnitude higher than those of operating heavy-ion facilities, FRIB stands at the power frontier of the accelerator family - the first time for heavy-ion accelerators. To realize this innovative performance, superconducting RF cavities are used starting at the very low energy of 500 keV/u, and beams with multiple charge states are accelerated simultaneously. Many technological challenges specific for this linac have been tackled by the FRIB team and collaborators. Furthermore, the distinct differences from the other types of linacs at the power front must be clearly understood to make the FRIB successful. This report summarizes the technical progress made in the past years to meet these challenges.
NSCL, East Lansing, Michigan, USA
FRIB, East Lansing, Michigan, USA
The phase stability of rf reference line is usually quite restricted in a high energy linac (very long linac, very high frequency). Due to the change of the ambience temperature in the linac tunnel, the electrical length of reference rf cables may change significantly, which results in unacceptable phase changes in cavities. So, sometimes the reference line is very expensive, for example, made of optical fiber housed in a lengthy thermostatic chamber. The frequencies of FRIB linac cavities are 80.5 and 322 MHz (not very high). We also take advantage of the double-folded linac geometry and feed the reference line in the center of the linac to effectively reduced the reference line by 6 times. Our studies show that the FRIB linac can tolerate up to 12ps phase stability of the rf reference line. Therefore, no special treatment is needed for the reference line.