Patent ID: 11107668

Abstract:
Four rod electrodes (50a to 50d) for separating ions according to a mass-to-charge ratio are held by a rod holder (51). The rod holder (51) is placed on a metal holder sustaining stand (52) provided on a bottom surface of a vacuum housing (1), and is fixed while being pressed by a fixation band (53) fixed to the holder sustaining stand (52) with screws (56). A heat release layer (55) made from heat dissipation silicone or the like is inserted between the fixation band (53) and the rod holder (51) and between the fixation band (53) and the holder sustaining stand (52). Therefore, heat generated in the rod holder (51) due to dielectric loss is not only directly transmitted to the holder sustaining stand (52), but also efficiently transmitted to the holder sustaining stand (52) through the fixation band (53).