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We describe an experiment using the Parkes radio telescope in the 1.2-1.5 GHzfrequency range as part of the LUNASKA project, to search for nanosecond-scalepulses from particle cascades in the Moon, which may be triggered byultra-high-energy astroparticles. Through the combination of a highly sensitivemulti-beam radio receiver, a purpose-built backend and sophisticatedsignal-processing techniques, we achieve sensitivity to radio pulses with athreshold electric field strength of 0.0053 $\mu$V/m/MHz, lower than previousexperiments by a factor of three. We observe no pulses in excess of thisthreshold in observations with an effective duration of 127 hours. Thetechniques we employ, including compensating for the phase, dispersion andspectrum of the expected pulse, are relevant for future lunar radioexperiments.

A lunar radio experiment with the Parkes radio telescope for the LUNASKA project