 To fully utilize such high intensity beams and avoid overwhelming (and dangerous) isobaric contamination, accompanying efforts are needed in the new field of beam preparation and purification.In order to use high-resolution mass separation to eliminate isobaric impurities, a reduction of the beam emittance by an RFQ coolers is necessary to minimize transmission losses.As a result, a key feature in next generation RFQ beam coolers will be their ability to handle beam currents in the microampere range.