Abstract: A method for measuring axial deviation in a taut-wire alignment system (1) that includes a dynamically grounded resistive wire (2) extending along a longitudinal reference axis and adjacent to elements to be aligned (3). The method comprises applying an AC voltage signal to a measurement electrode provided with a reference electrode, the measurement electrode being arranged in a measurement plane in a holder attached to an element to be aligned (3); carrying out a measurement using a capacitive bridge that includes a first capacitor consisting of the measurement electrode and the wire, as well as a second capacitor, in order to provide a measurement signal representing an axial position of the measurement electrode relative to the taut wire (2) ; and processing the measurement signal to provide data indicating the axial deviation between the element to be aligned (3, 7) and a predetermined alignment position. The method is particularly suitable for aligning elements in linear colliders.

Abstract: A positioning actuator with three axes includes a base having a movable supporting member and a device for moving the member up and down, and a shaft connecting the movable head of the actuator to the base. The connecting shaft forms a swivel-type double linkage enabling sideways movement of the head relative to the base, and the lower end of the connecting shaft engages a part made of elastomeric material and is provided within the movable supporting member.