BNL, Upton, Long Island, New York, USA
Fermilab, Batavia, USA
One option for acceleration Muons from 30 to 750 GeV is to use a rapid cycling synchrotrons with frequencies of 400-550 Hz. A lattice has been proposed which employs 8T, 4.2 m long superconducting dipole magnets which are interleaved with 1.8T, 7.5 m long normal conducting dipoles. The present design of the normal conducting dipoles for this lattice is based on grain oriented steel, which possesses good magnetic properties in the direction of the grains. Grain oriented steel however is highly anisotropic, which can potentially lead to field quality problems. In this paper we present an alternative design, which suggests lower losses, a higher peak field and better field quality.
Muons, Inc, Illinois, USA
Fermilab, Batavia, USA
MuPlus, Inc., Newport News, USA
The Helical Cooling Channel (HCC), a novel technique for six-dimensional (6D) ionization cooling of muon beams, has shown considerable promise based on analytic and simulation studies. However, the implementation of this revolutionary method of muon cooling requires new techniques for the integration of hydrogen-pressurized, high-power RF cavities into the low-temperature superconducting magnets of the HCC. We discuss progress and plans toward the critical path technology demonstrations of dielectric loaded 805 MHz RF cavities and 10 T Nb3Sn based Helical Solenoid magnet. Additionally we discuss integration challenges.
Muons, Inc, Illinois, USA
Fermilab, Batavia, USA
A helical cooling channel (HCC) consisting of a pressurized gas absorber imbedded in a magnetic channel that provides solenoid, helical dipole and helical quadrupole fields has shown considerable promise in providing six-dimensional phase space reduction for muon beams. The most effective approach to implementing the desired magnetic field is a helical solenoid (HS) channel composed of short solenoid coils arranged in a helical pattern. The HS channel along with an external solenoid allows the Bz and Bphi components along the reference orbit to be set to any desired values. To set dBphi/dr to the desired value for optimum focusing requires an additional variable. We shall show that using elliptical shaped coils in the HS channel allows the flexibility to achieve the desired dBphi/dr on orbit without significant change to Bz and Bphi.