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Muons have a similar latency/energy correlation from pion decay as do theneutrinos, and hence in each time-slice in a stroboscopic analysis measurementsof their momentum spectra can reduce systematic uncertainties due to flux.There are, however, unique issues for muons: 1) during standard neutrinodata-taking muon measurements in the forward direction must be in formidablehigh-flux high-radiation environments; 2) because of the very high incidenthadron flux in the Absorber Hall, muons must be detected after a thickabsorber, imposing a range cutoff at a momentum much above the minimum neutrinomomentum of interest; 3) the muon velocity, unlike that of neutrinos, differsfrom $c$, and so the muon detected time will require correction for the muonflight path, requiring measurement of the muon momentum; 4) multiple scatteringis significant for low-momentum muons, and so a `good geometry' is essentialfor precision muon flux measurements; and 5) developments in psec timing allowmuon momenta in the momentum region of interest to be measured precisely bytime-of-flight over short distances with photodetectors of a few-psecresolution. Here we advocate that a program of extensive precise low-intensitymuon momentum spectrum measurements be carried out early in the LBNF programbefore the Absorber Hall becomes too hot. The low-momentum muon spectra takenin this experiment would be cross-normalized to the high-intensity neutrinodata through the currently planned muon monitors which can operate in both thelow and high intensity geometries.  While beyond the scope of uniquely muon-related issues, the note includes aproposal for an long-base-line oscillation analysis strategy that exploitsstroboscopic information for both neutrinos and muons to reduce systematicuncertainties on the neutrino fluxes and event selection in Far and Neardetectors.

Adding Stroboscopic Muon Information For Reduction of Systematic Uncertainties in DUNE