  One possible approach for detecting ultra-high-energy cosmic rays and
neutrinos is to search for radio emission from extensive air showers created
when they interact in the atmosphere of Jupiter, effectively utilizing Jupiter
as a particle detector. We investigate the potential of this approach. For
searches with current or planned radio telescopes we find that the effective
area for detection of cosmic rays is substantial (~3*10^7 km^2), but the
acceptance angle is so small that the typical geometric aperture (~10^3 km^2
sr) is less than that of existing terrestrial detectors, and cosmic rays also
cannot be detected below an extremely high threshold energy (~10^23 eV). The
geometric aperture for neutrinos is slightly larger, and greater sensitivity
can be achieved with a radio detector on a Jupiter-orbiting satellite, but in
neither case is this sufficient to constitute a practical detection technique.
Exploitation of the large surface area of Jupiter for detecting
ultra-high-energy particles remains a long-term prospect that will require a
different technique, such as orbital fluorescence detection.
