20 Jan 2023



The nuSTORM facility will provide νe and νµ beams from the decay of low-energy muons confined within a storage ring. The instrumentation, combined with the knowledge of muon decay, will make it possible to determine the neutrino flux at the %-level





nuSTORM logo 

The Neutrinos from Stor​ed Muons facility​ will be the first neutrino-beam facility to be based on a stored muon beam and will form the core of a demonstrator for the high-energy muon collider

The neutrino beam will arise from the decays of muons confined in a storage ring with tunable momentum (1-6 GeV/c) and ~16% momentum spread. The well-known flavour composition and energy spectrum of the beam will allow ultimate precision νe and νμscattering measurements to be made over the kinematic range of interest to future long-baseline experiments. They will also enable searches beyond the Standard Model phenomena with a sensitivity that goes significantly beyond that of the short-baseline neutrino programme at FNAL. To maximize its impact, nuSTORM data-taking will begin by ≈ 2030 when the DUNE and Hyper-K collaborations will each be accumulating data sets capable of determining oscillation probabilities with per cent-level precision.​ 

Diagram showing particle production and decay in nuSTORM, described in caption below

​​Pions, produced in the bombardment of a target, are captured in a magnetic channel. The pion beam is then injected into the production straight of the decay ring. Roughly half of the pions decay as the beam passes through the production straight, while the undecayed pions and muons outside the momentum acceptance of the ring are directed to a beam dump.​​​ (SOURCE: K. Long, "nuSTORM at CERN: Executive Summary")​

The realisation of nuSTORM will strongly benefit the particle physics, nuclear physics and accelerator physics communities. The precise determination of neutrino-nucleus cross-sections will improve the sensitivity of DUNE and Hyper-K to CP​ violation. Neutrinos from muon decay will provide a unique 100% polarised probe of nuclear dynamics and collective effects in nuclei. The nuSTORM target complex and storage ring will provide an essential testbed for muon-collider and beam-instrumentation R&D.


PPD has long-standing expertise in measurements of neutrino cross-sectionand oscillations studies. One of the PPD projects is to develop the nuSTORM state-of-the-art simulation to improvethe design of the beamline, consolidate the detector design and perform sensitivity studies of neutrino cross-section measurements.​