[en] The physics requirements for the long base line neutrino oscillation experiment MINOS dictate that the NuMI beamline be located in the aquifer at Fermilab. A methodology is described for calculating the level of radioactivation of groundwater caused by operation of this beamline. A conceptual shielding design for the 750 meter long decay pipe is investigated which would reduce radioactivation of the groundwater to below government standards. More economical shielding designs to meet these requirements are being explored. Also, information on local geology, hydrogeology, government standards, and a glossary have been included

[en] We report a study of neutrino interactions on heavy nuclei in an exposure of emulsion stacks placed inside the Fermilab 15-foot Bubble Chamber. Our technique for locating interactions in cryogenically sensitive emulsions using bubble chamber measurements is described. We have compared hadrons produced in 128 charged-current neutrino interactions selected from 294 interactions found in emulsion, with hadrons produced in neutrino-deuterium interactions in the bubble chamber liquid. We have located and analyzed 5 charm particle decays. 45 refs., 13 figs., 4 tabs. (author)

[en] The charged-particle multiplicity distribution from 250-GeV/c π^-p interactions in the Fermilab 15-ft bubble chamber is presented. The corrections to the raw data are described. Fits to these data along with other high-energy bubble-chamber data show that cluster models with two components: a low-multiplicity, diffractive component and a high-multiplicity, nondiffractive component: describe the data fairly well. The charged multiplicity of each cluster is found to be approx.2, while the number of clusters for each component grows linearly with ln(s). The multiplicity moments are consistent with other experiments. We find < n/sub c/>=8.427 +- 0.059, f/sup c/c₂=8.66 +- 0.11, < n/sub c/>/D=2.038 +- 0.023. The total inelastic cross section is sigma/sub I/=21.42 +- 0.50 mb

[en] An event representing the production and decay of the charmed F⁺ meson has been identified by means of a 3-constraint fit to the decay hypothesis F⁺ → π⁺π^-π⁰, in which both γ-rays from the π⁰ converted. The event was produced by a charged current vsub(μ) interaction in an emulsion stack located inside the Fermilab 15-foot bubble chamber. The F⁺ traveled 50 μm, corresponding to a proper time of 1.4 x 10^-13 seconds, before decaying in flight. Its mass was determined to be 2017 +- 25 MeV. (orig.)

[en] Two-particle correlation functions R (Δy) have been studied for π⁺π^-, K⁰/sub S/K⁰/sub S/, K⁰/sub S/π^+-, Λπ^+-, and Lambda-barπ^+- pairs in π^-p interactions at 250 GeV/c. Dynamical correlations are estimated by subtracting a Monte Carlo calculation containing only energy and momentum conservation correlations. K⁰/sub S/K⁰/sub S/ correlations is found to be considerably larger than π⁺π^- correlation while K⁰/sub S/π^+-, Lambda-barπ^+-, and Λπ^+- correlations are small

[en] 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- 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 project, but it might also be of use for other conventional neutrino beams

[en] A data acquisition system consisting of time–of–flight scintillation counters, associated electronics, and a PDP–9 computer was developed and installed for use with the SLAC 40 in. hydrogen bubble chamber (HBC). The system was designed for optimum timing resolution subject to the limitations imposed by the HBC design and was used primarily to determine the momentum of a neutral beam of KL0 and neutrons, by measuring time–of–flight from a production target to the chamber. The system was also used to trigger the HBC flash only when a low momentum beam particle was recorded. Furthermore, this paper gives the details of the design and operation of the hardware and of the procedures necessary to incorporate the time–of–flight information into the more conventional bubble chamber picture analysis.

[en] A neutrino--proton scattering experiment has been performed at Fermilab by using a wide-band horn-focused neutrino beam and the 15-ft bubble chamber filled with hydrogen. For the inclusive reaction ν/sub μ/ + p → μ^- + hadrons, the mean value of Q² is found to increase linearly with energy, as is expected from Bjorken scaling, and a fit to the data gives < Q²> = (0.18 +- 0.01) E. The distribution in the Bjorken scaling variable x shows evidence for deviations from predictions based on electron-scattering data and the quark-parton model

[en] We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beam line at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle (6.3 deg.) with respect to the NuMI beam axis. Samples of charged-current quasielastic ν_μ and ν_e interactions are analyzed and found to be in agreement with expectation. This provides a direct verification of the expected pion and kaon contributions to the neutrino flux and validates the modeling of the NuMI off-axis beam.

[en] Results from the Fermilab 15-ft bubble chamber on the charged-particle multiplicity distributions produced in high-energy charged-current neutrino-proton interactions are presented. Comparisons are made to γp, ep, μp, and inclusive pp scattering. The mean hadronic multiplicity < n/subc/> appears to depend only on the mass of the excited hadronic state, independent of the mode of excitation. A fit to the neutrino data gives < n/subc/>= (1.09+-0.38) +(1.09+-0.03)lnW²