UKAEA Journals

Showing 1 - 10 of 707 Journals Results
2021
UKAEA-STEP-PR(21)01

Rare earth barium copper oxides (REBCO) are a particular class of cuprate high temperature superconductor. The favourable properties of REBCO coated conductor tapes (CCTs) and the well-established production methods have brought these tapes to the forefront of tokamak fusion research, showing a lot of promise for the development of powerful, high f…

Preprint
2021
UKAEA-CCFE-PR(21)81

The impact of plasma shaping through magnetic well modifications on the stability of resistive ballooning modes in tokamaks is analysed, also including finite diamagnetic flows. Various limiting cases of the dispersion relati…

Preprint Purchase
2021
UKAEA-STEP-PR(21)02

As part of the UKAEA Spherical Tokamak for Energy Production (STEP) fusion power station programme, a novel breeding blanket design was assessed. A conceptual design of STEP, which will be an innovative plan for a commercially-viable fusion power station, will be completed by 2024. The final aim of the current assessment is to find a conceptual des…

Preprint
2021
UKAEA-CCFE-PR(21)79

Reconstructions of plasma equilibria using magnetic sensors and a Dα constraint were routine during operation of the MAST spherical tokamak, but reconstructions using kinetic profiles was not. These are necessary for stability and disruption analysis of the MAST database, as well as going forward for operation in the upgrade to the device, MAST…

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 13/04/2022
2021
UKAEA-CCFE-PR(21)78

Alfvén eigenmode (AE) instabilities driven by alpha-particles have been observed in D-3He fusion experiments on the Joint European Torus (JET) with the ITER-like wall (ILW). For the efficient generation of fusion alpha-particles from D-3He fusion reaction, the 3‑ion radio frequency (RF) scenario was used t…

Preprint Published
2021
UKAEA-CCFE-PR(21)75

Eurofer97 steel is a primary structural material for the plasma facing-components of future fusion reactors. Laser welding is a promising technique that can overcome the challenges of remote handling and maintenance. However, the interaction of the induced residual stress distribution with the heterogeneous microstructure may degrade the mechani…

Preprint
2021
UKAEA-CCFE-PR(21)74

An important contribution to the mechanical stresses present in the ITER ICH antenna is related to the non-uniform heating of its front section due to RF losses, plasma and charge exchange, and the effects of neutron radiation. As a consequence, intensive convective cooling is necessary to maintain temperature and the related thermally induced s…

Preprint
2021
UKAEA-CCFE-PR(21)72

During the design process of fusion reactors it is desirable to rapidly prototype different design concepts and assess their suitability against a range of high level requirements. This helps to narrow the design window and scope out potential designs which can undergo further more detailed analysis. The Paramak is an open-source tool that aims …

Preprint Published
2021
UKAEA-CCFE-PR(21)69

The ASCOT orbit-following code has been equipped with a model for simulating charge exchange (CX) of fast ions with background atoms in magnetically confined fusion plasmas. The model was successfully verified by comparing simulated reaction mean free paths to analytical values across a range of fusion-relevant parameters. ASCOT was used to simu…

Preprint
2021
UKAEA-CCFE-PR(21)68

Using the notion of eigenstrain produced by the defects formed in a material exposed to high energy neutron irradiation, we develop a method for computing macroscopic elastic stress and strain arising in components of a fusion power plant during operation. In a microstructurally isotropic material, the primary cause of macroscopic elastic stress an…

Preprint