The Hadron Hose: Continuous Toroidal Focusing for Conventional Neutrino Beams

TL;DR

The Hadron Hose is a novel wire-based toroidal magnetic focusing device that enhances neutrino beam intensity and spectral uniformity for oscillation experiments.

Contribution

This paper introduces the Hadron Hose, a new continuous focusing system for neutrino beams, improving event rates and spectral consistency over traditional methods.

Findings

Increased neutrino event rate due to the Hadron Hose.

Reduced spectral differences between near and far detectors.

Potential applicability to various neutrino beam setups.

Abstract

We have developed a new focusing system for conventional neutrino beams. The ``Hadron Hose'' is a wire located in the meson decay volume, downstream of the target and focusing horns. The wire is pulsed with high current to provide a toroidal magnetic field which continuously focuses mesons. The hose increases the neutrino event rate and reduces differences between near-field and far-field neutrino spectra for oscillation experiments. We have studied this device as part of the development of the Neutrinos at the Main Injector (NuMI) project, but it might also be of use for other conventional neutrino beams.