Limits on muon-neutrino oscillations in the mass range Delta(m2) = 30-1000 eV2/c4

The results of a search for inclusive muon-neutrino oscillations (MNO) are reported. A beam of neutrinos with energies betweeen 40 and 230 GeV is produced by decays of sign and momentum-selected pions and kaons in a 352-m-long evacuated decay pipe with segmented ionization chambers, hadron dump, and muon profile monitor, and detected by shielded target calorimeters (with scintillation counters, spark chambers, and iron toroidal muon spectrometers) centered 715 and 1116 m from the midpoint of the decay pipe. The apparatus and data-reduction procedures are described in detail. Limits (at 90-percent confidence level) on MNO are shown in a graph in terms of Delta(m2) and sin2(2 theta): MNO are ruled out for Delta(m2) = 30-1000 eV2/c4 and sin2(2 theta) greater than 0.02-0.20. The implications for astrophysical models and certain grand unified theories are indicated.