CLIC (Compact Linear Collider) is a next generation particle collider under study at CERN. The accelerator will operate beams of nanometric size (1 nm ×40 nm) and produce a high density of collisions at the interaction cross section (2x10)^34 hits/(m^2 s)). To guarantee this collision quality, the pre-alignment tolerance of the main components of the accelerator must lie within 10 μm. In...
For the Sirius, Brazilia’s 4th generation light source under development by LNLS, a novel Double Cristal
Monochromator (DCM) is developed. The monochromator is known as one of the most critical optical
elements in a beamline. The new 4th generation light source, with an emittance in the range of 100 prad,
requires extreme stability performance, requiring a crystal to crystal stability in the...
The National Physical Laboratory (UK) has developed and delivered a novel 6 degree-of-freedom micro-vibration test system for the European Space Agency’s test centre, ESTEC. The system measures the dynamic force and torque produced by spacecraft components between 10 µN to 1 N (1 µNm to 1 Nm), and subjects sensitive specimens to a known micro-vibration environment in the range 1 µg to 10 mg....
Accurate, specific and traceable uncertainty budgeting of measurements is identified as key tool allowing micrometre alignment of large assemblies. The lack of standard methods to allow such accurate uncertainty statements is identified as a major research gap. As an answer to this a new uncertainty budgeting strategy following the International Standard of Uncertainty in Measurement (GUM -...
In the future linear collider CLIC, the electromagnets focussing the beams of particles will have to be extremely stable, at the nanometre scale. In order to fulfil such stringent requirements, a prototype of coil-free active isolation system has been developed. This presentation will summarize the latest results obtained with our active isolation system. It consists of an extended frame...
Development of a seismic sensor for the future Compact Linear Collider (CLIC) will be presented. Sensor in which three different types of sub-nanometre displacement transducers have been integrated: a Fabry-Pérot interferometer, an optical encoder and a capacitive transducer. This sensor allows us to compare the resolution of all the transducers under the same conditions, thus enabling us to...
Measuring machines gives a more and more accurate number of points in order to describe a surface. In a design process, we need to have a better description of geometry in order to assess all the behaviours involving interactions between material and it’s environment.
Focussing at the same time the infinite complexity of real objects and the simplification needed to make simple choices is a...
