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Title: Particle physics---Experimental

We are continuing a research program in particle astrophysics and high energy experimental particle physics. We have joined the DUMAND Collaboration, which is constructing a deep undersea astrophysical neutrino detector near Hawaii. Studies of high energy hadronic interactions using emulsion chamber techniques were also continued, using balloon flight exposures to ultra-high cosmic ray nuclei (JACEE) and accelerator beams. As members of the DUMAND Collaboration, we have responsibility for development a construction of critical components for the deep undersea neutrino detector facility. We have designed and developed the acoustical positioning system required to permit reconstruction of muon tracks with sufficient precision to meet the astrophysical goals of the experiment. In addition, we are making significant contributions to the design of the database and triggering system to be used. Work has been continuing in other aspects of the study of multiparticle production processes in nuclei. We are participants in a joint US/Japan program to study nuclear interactions at energies two orders of magnitude greater than those of existing accelerators, using balloon-borne emulsion chambers. On one of the flights we found two nuclear interactions of multiplicity over 1000 -- one with a multiplicity of over 2000 and pseudorapidity density {approximately} 800 in themore » central region. At the statistical level of the JACEE experiment, the frequency of occurrence of such events is orders of magnitude too large. We have continued our ongoing program to study hadronic interactions in emulsions exposed to high energy accelerator beams.« less
Authors:
; ; ;
Publication Date:
OSTI Identifier:
6003208
Report Number(s):
DOE/ER/40614-8
ON: DE92004253
DOE Contract Number:
FG06-91ER40614
Resource Type:
Technical Report
Research Org:
Washington Univ., Seattle, WA (United States). Dept. of Physics
Sponsoring Org:
DOE; USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COSMIC MUONS; MUON DETECTION; COSMIC NEUTRINOS; NEUTRINO DETECTION; ASTROPHYSICS; MULTIPLICITY; PARTICLE PRODUCTION; PROGRESS REPORT; CHARGED PARTICLE DETECTION; COSMIC RADIATION; DETECTION; DOCUMENT TYPES; ELEMENTARY PARTICLES; FERMIONS; IONIZING RADIATIONS; LEPTONS; MASSLESS PARTICLES; MUONS; NEUTRINOS; RADIATION DETECTION; RADIATIONS; SECONDARY COSMIC RADIATION 662320* -- Neutrino Interactions-- (1992-); 661300 -- Other Aspects of Physical Science-- (1992-); 440104 -- Radiation Instrumentation-- High Energy Physics Instrumentation