This document summarizes the work of the Accelerator Working
Group (AWG) of the International Scoping Study (ISS) of a Future
Neutrino Factory and Superbeam Facility. The main goal of the
activity was to reach consensus on a baseline design for a Neutrino
Factory complex, including proton driver parameters, choice of
target, front-end design, acceleration system design, and decay ring
geometry. Another goal was to explore the commonality, if any,
between the proton driver for a Neutrino Factory and those for a
Superbeam or Beta Beam facility. In general, the requirements for
either of the latter facilities are less stringent than those for a
Neutrino Factory. Here, we discuss concepts, parameters, and
expected performance of the required subsystems for our chosen
baseline design of a Neutrino Factory. We also give an indication of
the main R&D tasks — many of which are already under way —
that must be carried out to finalize facility design approaches.
Fermilab is working on the design of an 8 GeV superconducting RF H − linac called the Proton Driver. The energy of H − beam will be an order of magnitude higher than the existing ones. This brings up a number of technical challenges to transport and injection of H − ions. This paper will focus on the subjects of stripping losses (including stripping by blackbody radiation, field and residual gas) and carbon foil stripping efficiency, along with a brief discussion on other issues such as Stark states lifetime of hydrogen atoms, single and multiple
A muon front-end system is described which includes an initial pion to muon decay channel, a reverse phase slip bending chicane and a 190–400 MeV, 88 MHz muon linac. A chicane is preferred to a phase rotation system as it leads to a more linear acceleration of the muons in a shielded, 88 MHz linac. The design proposed is compatible with the linac-compressor ring option for the proton driver of the CERN neutrino factory scheme.
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