MuCOOL-269 Exploration of the “High-Frequency ” Buncher Concept

A new scenario for capture, bunching and phase-energy rotation of µ’s from a proton source is explored. In an initial example, it consists of a drift section, a changing frequency ~300→~200 MHz bunching section, followed by a fixed or changing frequency (~200 MHz) φ-δE rotation section. The system is a preferred alternative to the induction linac + buncher scenarios developed for the neutrino factory feasibility studies. The total rf required for this system is relatively modest, it uses established technology, and it should be substantially less expensive than previous induction linac or low-frequency systems. It would also simultaneously capture both positive and negative muons in similar bunch trains. Optimization and variations are discussed; the concept can work for a wide range of rf frequencies and bunch train lengths