D. Kumar J. Hargreaves A. Bharj A. Scorror L. M. Harding H. Dominguez-Andrade R. Holmes R. Burrows H. Dawson A. D. Warren P.E.J. Flewitt T.L. Martin
Plasma-wall interactions in a commercial-scale fusion power station may exert high transient thermal loads on plasma-facing surfaces, repeatedly subjecting underlying structural materials to high temperatures for short durations. Specimens of the reduced activation ferritic-martensitic steel Eurofer-97 were continuously aged at constant temperat…
Preprint PublishedT.L. Martin A.D. Warren D. Kumar A. Siberry R. Springell R. Holmes R. Clark L. Platts R. Burrows C. Harrington M. Gorley E. Surrey S. Rowthu P. Grundler S. Ritter
The next generations of nuclear fusion reactors, including ITER and DEMO, will consider several different cooling systems for heat dissipation, power generation and tritium breeding. This includes the water-cooled lithium-lead blanket (WCLL) design, which bears significant similarities to the water-cooled circuit in a pressurised water fission reac…
PreprintC Harrington A Baron-Wiechec R Burrows R Holmes R Clark S Walters T Martin R Springell J Öijerholm R Becker
The European DEMO design will potentially use single phase water cooling in various components that require protection against corrosion damage. Coolant conditions will be similar to fission PWRs but with additional considerations arising from the materials of choice (Eurofer, CuCrZr), 14 MeV neutron irradiation, the presence of tritium, and strong…
Preprint PublishedI. Turner A J T. Holmes
A model for a beam-driven plasma neutraliser for a 1MeV, 40A beam of D- ions is presented and is based on the dimensions of the ITER gas neutraliser. For the beam-driven plasma neutraliser there is no need for an external power source for producing and sustaining the plasma. Instead the use of high magnetic fields is employed for plasma confinement…
Preprint PublishedI Turner A J T Holmes J Zacks R McAdams
A 1D model of an RF driven ion source is presented and is based on the ionisation of thermal electrons. The RF source differs from traditional filament and arc ion sources because there are no primary electrons present, and is simply composed of an antenna region (driver) and a main plasma discharge region. However the model does still make use …
Preprint PublishedR. McAdams A. J. T. Holmes D. B. King E. Surrey I. Turner J. Zacks
A summary of negative ion development work being presently undertaken at the Culham Centre for Fusion Energy (CCFE) is given. The Small Negative Ion Facility (SNIF) has an RF driven volume ion source with beam extraction at energies up to 30keV. The extracted beam of Hions has an associated co-extracted electron beam with an electron to ion ratio o…
Preprint PublishedE. Surrey A.J.T. Holmes
A one dimensional model of the magnetic multipole volume plasma source has been developed for application to intense ion/neutral atom beam injectors. The model uses plasma transport coefficients for particle and energy flow to create a detailed description of the plasma parameters along an axis parallel to that of the extracted beam. In this paper …
Preprint PublishedE. Surrey A.J.T. Holmes
A one dimensional model of the magnetic multipole volume plasma source has been developed for use in intense ion/neutral atom beam injectors. The model uses plasma transport coefficients for particle and energy flow to create a detailed description of the plasma parameters along an axis parallel to that of the extracted beam. Primarily constructed …
Preprint Published