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 the 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.
- Research Organization:
- Washington Univ., Seattle, WA (United States). Dept. of Physics
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG06-91ER40614
- OSTI ID:
- 6003208
- Report Number(s):
- DOE/ER/40614-8; ON: DE92004253
- Country of Publication:
- United States
- Language:
- English
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GENERAL PHYSICS
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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
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