A 6-D Muon Cooling System using Achromat Bends

Cooled beams of muon particles for use in elementary particle physics experiments are needed to advance mankind¿s understanding of the fundamental nature of energy, the elementary constituents of matter, and the forces that control them. A major obstacle for building a case for future muon colliders or neutrino factories has been the lack of an experimental demonstration of the principle of ionization cooling of muons and, in particular, six-dimensional (6-D) cooling and emittance exchange. Past work has focused on lattice design, simulation studies and magnet design for a compact gas-filled storage ring for 6-D cooling of muon beams. The Phase I project extended those design results. The Phase I feasibility studies made advancements, as beam cooling was observed under two of the five cases studied. The Phase II project will continue the refinement and optimization of the preferred lattice of a 6-D muon cooling system using achromat bends. Work will continue to define and develop a credible beam injection/extraction scheme. A high temperature superconducting (HTS) solenoid, a crucial sub-system of the 6-D muon cooling machine, will be designed, built, and tested during this phase. Commercial Applications and other Benefits as described by the awardee: A robust, simple and economical cooling system to cool ion and particle beams has use in ion lasers, biotech, medical, and nanotechnology applications. Development of HTS magnet technology may revolutionize future medical and accelerator facilities. Various magnets in muon colliders, hadron colliders, and facilities for rare isotope beams benefit significantly from the ability of HTS to produce high fields and to handle and economically remove large energy depositions. The whole field of muon colliders and neutrino factories may benefit from HTS technology.