An adhesive film for a reflection sheet and a reflection sheet using the adhesive film is provided. An electrical power pack may include a first power switch and a delay element to delay an operation of the first power switch. A plurality of speakers are provided for sounding musical tones corresponding to a musical tone signal supplied from said tone generator. A neutral gas that has been introduced into the vacuum chamber interacts with the generated discharge, producing ions within the vacuum chamber that are subsequently transferred into the mass analyzer in the vacuum chamber.