Alessandro BERTARELLI (CERN)
LHC Collimators (Phase II): What is an ideal material?
The collimation system which is being installed has been designed to ensure high robustness during the LHC start-up and initial luminosity runs (Phase I). However, RF studies predict that the Phase I collimator impedance will prevent the machine from attaining its nominal luminosity. Hence, from the early phases of design, it has been envisaged to complement this system with a series of...
Ludger WEBER (EPFL)
Diamond-based Metal Composites
High end applications as the beam collimators for the LHC or first wall materials in fusion reactors require not only innovative engineering of the assembly and the structural parts but require also unique property combinations of the materials they are made of, e.g. good electrical conductivity, high thermal conductivity, low absorption of elemental particles, low coefficient of thermal...
René NAGEL (ARC)
Copper based composites reinforced with carbon nanofibers
The Powder Technology Center of the Austrian Research Centers GmbH is working since several years on the development of materials with advanced thermal properties. Different Cu and Al based fiber or particle reinforced composites have been studied. As reinforcement materials carbon fibers, carbon nanofibers (nanotubes), SiC or diamond particles have been used to prepare materials with...
Sven KNIPPSCHEER (PLANSEE SE)
Development and manufacturing status of diamond-based composites
Advanced metal diamond composites with Silver, Aluminum and Copper matrices exhibit high thermal conductivity in the range of 400-700 W m-1 K-1 and low CTE of about 7 – 9 ppm/K. A gas pressure assisted infiltration process has been developed for cost-efficient industrial production of diamond composite substrates and heat sinks. The composite microstructure and interface morphology...
Carsten Omet (GSI)
Dynamic vacuum - Collimator technology for suppression and control of desorption gases
During operation with low charge state heavy ions (e.g. U28+) in the GSI synchrotron SIS18, fast beam losses have been observed in experiments. At the same time, a dynamic behaviour of the residual gas pressure was observed. To evercome these problems, a collimator system has been devoped and is now in the final preparation for installation into two of the twelve sectors of SIS18 in the...
Javier Narciso (Alicante University)
Carbon-metal composites for thermal management
Carbon-metal matrix composites are a very attractive materials for thermal applications, given their very high thermal conductivity in at least two planes. Therefore, in an attempt to obtain a good thermal conducting material as well as a low Coefficient of Thermal Expansion (CTE), a mixture of reinforcements (graphite and carbon fibre) was infiltrated with liquid alloys. The role of...