Spin manipulator for use in electron spectroscopy

A spin manipulator (20) for use in electron spectroscopy, comprising a multipole assembly comprising eight poles or a multiple of four poles greater than eight. The multipole assembly comprises inner pole elements (22) and outer poles (26). There is a vacuum vessel (24) inside of which the inner pole (22) elements are provided. The inner poles are connectable to a voltage source for the generation of an electric field. The outer poles (26) are provided outside the vacuum vessel along the periphery of the vacuum vessel (24), and are connectable to a current source for the generation of a magnetic flux. The inner pole elements (22) are essentially flat and rectangular structures. There is provided an end plate (34a, 34b) at each end of the vacuum vessel (24), said end plates arranged to be insulated from the vacuum vessel and to abut the inner pole elements with insulator means interposed between the inner poles and an end plate.