Progress report on a new search for free e/3 quarks in the cores of 10(15) - 10(16) eV air showers

Details Progress report on a new search for free e/3 quarks in the cores of 10(15) - 10(16) eV air showers Progress report on a new search for free e/3 quarks in the cores of 10(15) - 10(16) eV air showers

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....8..306h&link_type=abstract

In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 8 p 306-309 (SEE N85-36066 24-93)

Physics

Cloud Chambers, Cores, Cosmic Ray Showers, Particle Density (Concentration), Quarks, Scintillation Counters, Stereophotography, Trigger Circuits, Charged Particles, Galactic Cosmic Rays, Ionization Chambers

Scientific paper

The Leeds 3 sq m Wilson cloud chamber is being used in a new search for free e/3 quarks close to the axes of 10 to the 15th power - 10 to the 16th power eV air showers. A ratio trigger circuit is used to detect the incidence of air shower cores; the position of the shower center and the axis direction are determined from photographs of current-limited spark chambers. It is thus possible, for the first time, to know where we have looked for quarks in air showers and to select for scanning only those cloud chamber photographs where we have good evidence that the shower axis was close to the chamber. 250 g/sq cm of lead/concrete absorber above the cloud chamber serve to reduce particle densities and make a quark search possible very close to the shower axes. The current status of the search is given.

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