| Preprint | |
| Report number | CERN-ACC-2015-0082 |
| Title | Experiment of Laser Pointing Stability on Different Surfaces to validate Micrometric Positioning Sensor |
| Author(s) | Stern, Guillaume (Zurich, ETH) ; Mainaud Durand, Helene (CERN) ; Piedigrossi, Didier (CERN) ; Sandomierski, Jacek (CERN) ; Sosin, Mateusz (CERN) ; Geiger, Alain (Zurich, ETH) ; Guillaume, Sebastien (Zurich, ETH) |
| Publication | 2014 |
| Imprint | 13 Oct 2014 |
| Number of pages | 6 |
| Presented at | 13th International Workshop on Accelerator Alignment (IWAA 2014), Beijing, China, 13 - 17 Oct 2014 |
| Subject category | Accelerators and Storage Rings |
| Study | CLIC |
| Keywords | CLIC ; Survey ; Alignment |
| Abstract | CLIC requires 10 μm precision and accuracy over 200m for the pre-alignment of beam related components. A solution based on laser beam as straight line reference is being studied at CERN. It involves camera/shutter assemblies as micrometric positioning sensors. To validate the sensors, it is necessary to determine an appropriate material for the shutter in terms of laser pointing stability. Experiments are carried out with paper, metal and ceramic surfaces. This paper presents the standard deviations of the laser spot coordinates obtained on the different surfaces, as well as the measurement error. Our experiments validate the choice of paper and ceramic for the shutter of the micrometric positioning sensor. It also provides an estimate of the achievable precision and accuracy of the determination of the laser spot centre with respect to the shutter coordinate system defined by reference targets. |
| Copyright/License | Preprint: © 2015-2025 CERN (License: CC-BY-4.0) |
| Submitted by | [email protected] |
ჩანაწერი შექმნილია 2015-08-04, ბოლოს შესწორებულია 2016-06-29
