Because of the increased radioactivity in LSS2 (SPS slow extraction towards north area), new low-Z materials were studied for use in electrostatic septa. Carbon Nano Tubes wire (CNT) was the first candidate to be studied. A test facility was built to assess the behaviour of the CNT wires in high field conditions.
CERN-ISOLDE is a facility dedicated to the production of radioactive ion beams (RIBs) for physics research.
The quality and quantity of available RIBs is governed by the choice of target materials and their microstructural properties.
In this contribution we highlight the potential of nanomaterials and carbon nanotubes in target material development for more efficient isotope extraction and...
Thin targets are used in high-power accelerators because of low energy deposited by the beam and fast cooling.
Extreme beams test the limits to those structures. A series of damage tests done on CERN machines on carbon fiber targets used in wire scanners is presented. Damage events observed on PSI machines on carbon fibers and molybdenum wires are discussed.
The presentation will provide an overview of the 1D and 2D nanomaterials synthesis capabilities at the University of Bath and some initial ideas to develop carbon nanotube-based ropes for CERN’s wire scanner application.
DEXMAT produces Galvorn CNT materials using a proprietary fluid phase production method. This method produces CNTF in which the CNT molecules are highly aligned along the fiber axis, resulting in high strength, electrical conductivity, and thermal conductivity along the axis of the fiber. Compared to a copper wire with the same diameter, a CNTF produced by this method has 12 times higher...
As part of a study on the properties of carbon nanotubes, we are going to briefly present the micro-Robotex station, which consists of a Zeiss Auriga 60 scanning electron microscope, on which are installed a Focused Ion Beam-FIB from Orsay Physics, a Gas Injection System-GIS from Oxford Instrument, and a robot with 6 degrees of freedom installed inside the vacuum chamber. By manufacturing...
The microscopy team at CERN is devoted to providing material characterization including topographical imaging, morphology, phase identification and chemical analysis through the utilization of Scanning Electron Microscopy (SEM), Focused Ion Beam (FIB)-SEM and X-ray Diffraction (XRD).
Material characterization is carried out on a wide range of materials with emphasis on metals and alloys,...
Floating catalyst CVD is the universal route to grow 1D nanoparticles, such as nanotubes and nanowires, in the gas phase and collect them in the form of freestanding nanotextiles, non-woven mats, and fibres. Due to high aspect ratio of constituent nanoparticles and network structure, macromaterials of CNTs exhibit high mechanical and electrical properties coupled with high flexibility and...
MME Mechanical and Materials laboratories undertake thermophysical and mechanical measurements for a wide range of components and devices at CERN, and uses state-of-the-art techniques to provide the necessary inputs for the analyses, and validate them experimentally. Thus, these laboratories constitute a crucial resource in supporting critical equipment throughout its lifecycle, from...
The increased luminosity of future particle accelerators will require improvements to beam instrumentation techniques and materials. A promising route for future wire scanners is the use of braided carbon nanotubes which have an exceptional combination of mechanical and thermal characteristics. This study outlines initial investigations into the effects of braiding on mechanical performance...
Calculation of the energy loss of an incident beam in a thin wire is the first step if we want to assess the thermal behaviour of the wire during the scan process. We will present these calculations with the FLUKA code and the choice of key parameters to get realistic results. Simulations at specific energies for SPS (450 GeV), LHC (7 TeV) and FCC (50 TeV) were performed with different...
Low-density materials as targets for wire scanners demonstrate favorable thermal behavior. Simulations with the PyTT package are carried out to study the secondary emission yield and the maximum temperature for carbon nanotube and carbon fibre wire for the PSI Main Ring Cyclotron and HL-LHC beams. These results show that with low-density materials, the maximum temperature reached is lower due...
