Results from a magnetic-monopole search utilizing He proportional tubes

The results from the University of California, San Diego magnetic-monopole search are presented. The detector is an array of helium proportional tubes having an aperture whose area\ifmmode\times\else\texttimes\fi{}solid angle is 32.4 ${\mathrm{m}}^{2}$sr. For a live time of 367 days, no bare monopole candidates were observed, setting the upper flux limit of 2.3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}13}$ ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}2}$${\mathrm{sr}}^{\mathrm{\ensuremath{-}}1}$${\mathrm{sec}}^{\mathrm{\ensuremath{-}}1}$ for velocities between 1.1\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}4}$ c and 6.0\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}4}$ c. A description of a larger proportional-tube array (256 ${\mathrm{m}}^{2}$sr) is also given in the Appendix.