An image output device of the invention includes an XHTML analyzer module 22 that analyzes each input XHTML file and generates RGB data, a conversion unit 30 that converts the RGB data into CMYK print data, and a print execution module 34 that transfers the print data to a print head to execute printing. A radial erosion rate profile for a given magnetron is measured. The present invention enables display of structure in cross-section by setting a strip-like processing region in an inclined portion of a sample cross-section and enlarging the display of the strip-like processing region on a processing monitor in a short-side direction. The system may be deployed as a single UIMVIM pair or as multiple UIMVIM pairs within a multi-fixture installation. A second end of the air duct curves upwardly to a nozzle provided on the top side of the duct cover.