CERN Accelerating science

Internal Note
Report number	CERN-ACC-NOTE-2016-0068
Title	Recent development of micro-triangulation for magnet fiducialisation
Author(s)	Vlachakis, Vasileios (CERN) ; Fuchs, Jean-Frederic (CERN) ; Mainaud Durand, Helene (CERN)
Corporate author(s)	CERN. Geneva. ATS Department
Publication	2016
Imprint	05 Dec 2016
Number of pages	6
Presented at	14th International Workshop on Accelerator Alignment, Grenoble, France, 3 - 7 Oct 2016
Subject category	Engineering
Study	CLIC
Keywords	Fiducialisation ; Quadrupole ; CLIC ; Pacman ; Microtriangulation ; Survey ; Alignment
Abstract	The micro-triangulation method is proposed as an alternative for magnet fiducialisation. The main objective is to measure horizontal and vertical angles to fiducial points and stretched wires, utilising theodolites equipped with cameras. This study aims to develop various methods, algorithms and software tools to enable the data acquisition and processing. In this paper, we present the first test measurement as an attempt to demonstrate the feasibility of the method and to evaluate the accuracy. The preliminary results are very promising, with accuracy always better than 20 μm for the wire position, and of about40 μm/m for the wire orientation, compared with a coordinate measuring machine.
Other source	Inspire
Submitted by	[email protected]