Taking the next step

Policy makers need a way to measure environmental results of farming practices, and incorporate those outcomes into farm policy. Modeling tools can help, but are not yet adequate to serve as performance-based policy guidelines. Roundtables can help diverse groups of people explore a new concept like performance-based policies.</p

Generation of nonlinear force driven blocks from skin layer interaction of Petawatt-Picosecond laser pulses for ICF

The discovery of the essential difference of maximum ion energy for TW-ps laser plasma interaction compared with the 100 ns laser pulses[lI led to the theory of a skin layer model ['I where the control of prepulses suppressed the usual relativistic self-focusing. The subsequent generation of two nonlinear force driven blocks has been demonstrated experimentally and in extensive numerical studies where one block moves against the laser light and the other lock into the irradiated target. These blocks of nearly solid state density DT plasma correspond to ion beam current densities L31 exceeding lo1' A/cm' where the ion velocity can be chosen up to highly relativistic values. Using the results of the expected ignition of DT fuel by light ion beams, a selfsustained fusion reaction front may be generated even into uncompressed solid DT fuel similar to the Nuckolls-Wood [41 scheme where 10 kJ laser pulses produce 100 MJ fusion energy. This new and simplified scheme of laser-ICF needs and optimisation of the involved parameters