The distribution of laser beams' intensity leads to such important spatial parameters as oscillation modes of laser device, divergence Angle of laser beams, the power of laser beams, laser radius etc.
The characteristic of spatialdistribution of plasma ion density in reaction chamber were diagnosed by a Langmuir double probe, and the effect of Ar pressure and RF power were also investigated.
The aggregation indices and Taylor's power law are used to test the spatialdistribution of the third generation larvae of leaf miner in the tobacco fields.