| Published Articles | |
| Report number | CERN-ACC-2017-0004 |
| Title | A Rotary Mount for Positioning a Stretched Wire Axis Within a Coordinate Measurement Machine |
| Author(s) | Sanz, Claude (CERN & Cranfield University) ; Cherif, Ahmed (CERN) ; Mainaud Durand, Hélène (CERN) ; Morel, Francois (CERN) ; Morantz, Paul (Cranfield University) ; Shore, Paul (Cranfield University) ; Schneider, Jürgen (HEXAGON METROLOGY) ; Steffens, Norbert (HEXAGON METROLOGY) |
| Publication | 2017 |
| Imprint | 2016-10-03 |
| In: | 14th International Workshop on Accelerator Alignment, Grenoble, France, 3 - 7 Oct 2016 |
| Subject category | Accelerators and Storage Rings |
| Abstract | The European Organisation for Nuclear Research (CERN) is studying future colliders for increasing the chances of new discoveries. Among them there is the Compact Linear Collider (CLIC). This electron-positron collider with a sub-micrometric beam size would require a pre-alignment of its thousands of elements within tolerances at the micron level. For this, a test bench where the pre-alignment is performed in one single series of measurements using a stretched wire as a reference is being considered. This study is the focus of the PACMAN project, a study on Particle Accelerator Components’ Metrology and Alignment to the Nanometre scale. This project is a Marie-Skłodowska Curie Program supported by the European Commission (FP7 Program). This series of measurements consists in the alignment of a stretched wire at the theoretical position of the beam in each collider element, followed by its location with respect to references positioned outside the element. The challenge is to measure the form error of this wire with 0.1 µm accuracy and its position with 0.5 µm precision on a Coordinate Measuring Machine (CMM). For this purpose, a non-contact sensor is being mounted on a support so that it can rotate. This paper introduces the requirements for this support and the sensor: no magnetic fields created, high accuracy on the positioning, low error motion, open on the side; and it describes and discusses the technical solutions: from the material to use to the bearings, including the kind of sensor. |
Email contact: tommaso.portaluri@cern.ch
Record created 2017-02-01, last modified 2017-02-01
