A water Cherenkov counter sensitive to nonwaveshifted ultraviolet Cherenkov photons

We describe a prototype water Cherenkov counter which has been built and tested with relativistic cosmic ray muons. An analysis of the expected photoelectron yield is described. The predicted result of 315 +/- 31 photoelectrons is compared with the experimental result of 272 +/- 30 photoelectrons. We find that over 70% of the Cherenkov photons detected have wavelengths less than 400 nm.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/25977/1/0000043.pd

Search for Nucleon Decays induced by GUT Magnetic Monopoles with the MACRO Experiment

The interaction of a Grand Unification Magnetic Monopole with a nucleon can lead to a barion-number violating process in which the nucleon decays into a lepton and one or more mesons (catalysis of nucleon decay). In this paper we report an experimental study of the effects of a catalysis process in the MACRO detector. Using a dedicated analysis we obtain new magnetic monopole (MM) flux upper limits at the level of $\sim 3\cdot 10^{-16} cm^{-2} s^{-1} sr^{-1}$ for $1.1\cdot 10^{-4} \le |\beta| \le 5\cdot 10^{-3}$, based on the search for catalysis events in the MACRO data. We also analyze the dependence of the MM flux limit on the catalysis cross section.Comment: 12 pages, Latex, 10 figures and 2 Table

A study of the reaction p+p -> d+[positive pion] from 1 to 2.8 BeV

http://deepblue.lib.umich.edu/bitstream/2027.42/5458/5/bac5594.0001.001.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/5458/4/bac5594.0001.001.tx

A Study Of The Reaction Proton-proton Going To(deuteron,positive Pion) From 1 To 2.8 Bev.

PhDNuclear physicsUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/183928/2/6505908.pd

PBAR: A superconducting magnet spectrometer for cosmic ray antiproton studies

We describe the PBAR balloon-borne magnet spectrometer flown on August 13-14, 1987 to measure the abundance of cosmic ray antiprotons in the energy interval 100-1580 MeV at the top of the atmosphere. The limits first reported [S.P. Ahlen et al., Phys. Rev. Lett. 61 (1988) 145] have been improved [M.H. Salamon et al., Astrophys. J. 349 (1990) 78] to an overall limit (85% CL). We summarize the overall design and performance of the PBAR spectrometer, which had the unique ability to establish the mass of each singly charged cosmic ray, as well as to reject spurious antimatter candidates caused by hard scatterings within the instrument.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/28388/3/0000161.pd