A light source device includes at least one discharge tube, a discharge medium sealed inside the discharge tube, and first and second electrodes for exciting the discharge medium. The suction belt is subjectible to vacuum from suction regions of different pressure levels disposed behind one another in a direction of sheet transport and the suction regions are producible by a single vacuum source. The sensor output is sequentially displayed as a graph on a display device. Retention members protrude from the interior of the outer container to retain the plastic liner within the storage tank. Using the present invention, every detectable cell in a population can be identified and affected, without substantially affecting non-targeted cells within the mixture. The product slurry is exposed to a pressure drop in a flash zone, producing a second slurry and vaporized diluent.