An apparatus and method for manipulating, effecting interaction of, photochemically transforming andor sorting small dielectric particles or other materials. A laser scanning optical system deflects and scans a plurality of laser beams concurrently with a single polygon mirror to irradiate the photosensitive drums. The first base station communicates with a user equipment within the first cell. The processor is configured to determine the parameters of the structure from the one or more output signals during measurements. The third housing chamber is connected with a second pressure channel 11 of a second pressure connection 10.