A method and apparatus for regulating photocurrents is described. The pool skimmer basket kit of the invention may further include a third skimmer basket, the third skimmer basket having a peripheral wall portion and a bottom wall portion, each wall portion of the third skimmer basket defining therein a plurality of perforations of a third size. They may be deposited on an intermediate structure selected in the group consisting of glass fibers, carbon fibers, SiC foams, carbon foams, alveolar \u03b2-SiC foams, said intermediate structure filling the reaction chamber of said reactor at least partially. Theses plurality of parallel flanges are used to increase the coupling coefficient and directivity of the helix coupler and maintain geometries that optimize magnetic field coupling.