Improved flux limits for particles with energies in excess of 10 ²² eV and the status of the Nu- Moon@LOFAR observations

When Ultra-high-energy (UHE) neutrinos or cosmic rays interact in the lunar surface they will initiate a particle cascade. These cascades have a sizeable negative charge excess and radiate coherent Cherenkov radio emission in a process known as the Askaryan effect. The optimal frequency window for observing these pulses with radio telescopes on the Earth lies around 150 MHz. Using this principle we are able to set a limit on the flux of both UHE neutrinos and UHE cosmic rays with 47.6 hours of observation time with the Westerbork Synthesis Radio Telescope array. In the near future, the digital radio array LOFAR will be used to perform a more sensitive observation. The status of this project, the NuMoon project, will be presented including the results of a complete simulation of the sensitivity.