A multi-grid ion beam source has an extraction grid, an acceleration grid, a focus grid, and a shield grid to produce a highly collimated ion beam. The system includes a validator that determines a reference digital signature for an executable image using the contents of the executable image excluding those portions of the executable that are fixed-up by a program loader. Advantageously, the relatively fixed window permits operation at relatively high frequencies such as at OC-192 rates of SONET. The horizontal electric field control unit controls the potentials of pairs of drive electrodes included in the liquid crystal panel, and thereby controls a horizontal electric field that is generated between each pair of drive electrodes. The respective screens only need to be suspended in the related holders in such a suspension device. for a period ranging from 4 to 24 hours and separating it to obtain polyaniline salt in both solution and solid forms, which are soluble in organic solvents and a mixture of solvents.