Water was photoionized through a one-photon process upon 193 nm laser irradiation. The quantum yield of photoionization was a few percent. Multiphoton ionization was not observed in this work, up to the laser fluence of 1.6 J/cm2.
JapanThe determination of anions in aqueous solution using an ArF laser is described. Chloride ion can be determined down to a level of 4X10-' M by measuring the absorption of Cl formed by ArF laser irradiation using a multiple-reflection method with a helium-cadmium laser (~=325 nm) as the monitoring light source. Br, I-, SCN-and 5042-were determined by measuring the absorption of radicals or hydrated electrons formed upon UV laser irradiation with detection limits of 4X l0-', 4X107, 1X106 -and 1 X 10.4 M, respectively.
We have applied magnetic assist and magnetic pulse compression to copper vapor laser and studied the switching characteristics, especially with the attention to the energy dissipation characteristics. As for magnetic assist, a suitable delay time was studied. And 2-stage MPC was designed using a simulation code and an all solid state driver with SI thyristors was developed.
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