This paper explores the use of L/E oscillation probability distributions to compare experimental measurements and to evaluate oscillation models. In this case, L is the distance of neutrino travel and E is a measure of the interacting neutrino's energy. While comparisons using allowed and excluded regions for oscillation model parameters are likely the only rigorous method for these comparisons, the L/E distributions are shown to give qualitative information on the agreement of an experiment's data with a simple two-neutrino oscillation model. In more detail, this paper also outlines how the L/E distributions can be best calculated and used for model comparisons. Specifically, the paper presents the L/E data points for the final MiniBooNE data samples and, in the Appendix, explains and corrects the mistaken analysis published by the ICARUS collaboration.

Executive SummaryThis document presents the physics case for bringing SciBar, the fully active, finely segmented tracking detector at KEK, to the FNAL Booster Neutrino Beam (BNB) line. This unique opportunity arose with the termination of K2K beam operations in 2005. At that time, the SciBar detector became available for use in other neutrino beam lines, including the BNB, which has been providing neutrinos to the MiniBooNE experiment since late 2002.The physics that can be done with SciBar/BNB can be put into three categories, each involving several measurements. First are neutrino cross section measurements which are interesting in their own right, including analyses of multi-particle final states, with unprecedented statistics. Second are measurements of processes that represent the signal and primary background channels for the upcoming T2K experiment. Third are measurements which improve existing or planned MiniBooNE analyses and the understanding of the BNB, both in neutrino and antineutrino mode.For each of these proposed measurements, the SciBar/BNB combination presents a unique opportunity or will significantly improve upon current or near-future experiments for several reasons. First, the fine granularity of SciBar allows detailed reconstruction of final states not possible with the MiniBooNE detector. Additionally, the BNB neutrino energy spectrum is a close match to the expected T2K energy spectrum in a region where cross sections are expected to vary dramatically with energy. As a result, the SciBar/BNB combination will provide cross-section measurements in an energy range complementary to MINERνA and complete our knowledge of neutrino cross sections over the entire energy range of interest to the upcoming off-axis experiments.SciBar and BNB have both been built and operated with great success. As a result, the cost of SciBar/BNB is far less than building a detector from scratch and both systems are well understood with existing detailed and calibrated Monte Carlo simulations. The performance expectations assumed in this document are therefore well-grounded in reality and carry little risk of not meeting expectations.This document includes a site optimization study with trade-offs between the excavation costs associated with placing the detector at different angles from the axis of the BNB and the physics which can be performed with the neutrino flux expected at these locations. Table 1 provides a summary of the impact of placing SciBar at these locations on the proposed measurements. The overwhelming conclusion of this study is that an on-axis location presents the best physics case and offsets the additional costs due to excavation. The estimated cost of the detector enclosure at the desired on-axis location is $505K.This proposal requests an extension of the BNB run through the end of FY2007, one year past its currently approved run, regardless of the outcome of the MiniBooNE ν e appearance search. Our schedules show that SciBar would be operational in the BNB within 9 months of initiation of the ...

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Fermilab's unique ability to accumulate large numbers of antiprotons makes it possible to directly measure the gravitational force on antimatter for the first time. Such a measurement will be a fundamental test of gravity in a new regime, directly testing both the equivalence principle and the prediction of General Rel ativity that matter and antimatter behave identically in the gravitational field of the earth. VVe propose to decelerate antiprotons in the Main Injector and transfer them into an antihydrogen-production Penning trap. The anti hydrogen will emerge from the trap in a low-velocity beam and pass through an atomic interferometer where the gravitational deflection will be measured. A 1% mea surement should be possible soon after antihydrogen production is established. A possible follow-on phase of the experiment (beyond the scope of this LoI) can use laser-based interferometry techniques to measure much more precisely any difference between the gravitational forces 011 matter and antilllat ter and search . sensitively for a possible "fifth force" significantly weaker than gravity.

Design principles, materials properties, and a preliminary design are presented for a low cost, large aperture hadron calorimeter/muon identifier. The design reported is for a large water tank with light collectors to measure the Cerenkov light produced by the hadronic (and electromagnetic) shower induced by incident hadrons.

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We review the performance of the Fermilab rapid-cycling Booster emphasizing those a spec ts which allow acceleration of up to 4. 5 x 1013 protons per second to energies of 8 to 10 GeV. Characteristics of a kaon factory based on this machine will be discussed.

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