UKAEA Papers

Showing 1 - 10 of 1893 UKAEA Paper Results
2022
UKAEA-CCFE-PR(22)22

Capacitive plasma pickup is a well-known and difficult problem for plasma-facing edge diagnostics. Ths problem must be addressed to ensure an accurate and robust interpretation of the real signal measurements versus noise. JET’s Faraday cup fast ion loss detector array is particularly prone to this issue and can be used as a testbed to prototy…

Preprint
2022
UKAEA-CCFE-PR(22)21

This paper describes the development of electromagnetic plasma burn-through model. Full circuit equations describing the currents in solenoid, poloidal field coil, and toroidally conducting passive structure have been integrated into the differential equation system of the plasma energy and particle balances in DYON. This enables consistent calcula…

Preprint
2022
UKAEA-CCFE-PR(22)20

In this work, the Universal Equation of States (UES) is revisited and generalised by including ferromagnetic and antiferromagnetic configurations. The energy of a system is calculated by means of three parameters, namely, the energy, volume and corresponding scaling volume (directly related to the bulk modulus) at the local ground state of the corr…

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The published version of this paper is currently under embargo and will be available on 28/04/2023
2022
UKAEA-CCFE-PR(22)19

A systematic numerical investigation is carried out to understand the effect of variation of the equilibrium pressure pedestal structure on the H-mode plasma response to the applied resonant magnetic perturbation (RMP) field in tokamaks. The plasma response to the n=1−4 (n is the toroidal mode number) RMP fields is computed and …

Preprint
2022
UKAEA-CCFE-PR(22)18

A new method for the calculation of Shutdown Dose Rates (SDDR) has been developed, the Novel-1-Step (N1S) method. The new method retains the benefits of only requiring a single radiation transport calculation, as in the use of the direct-1-step (D1S) method, while removing the need for pre-calculations to determine dominant nuclides and time corr…

Preprint
2022
UKAEA-CCFE-PR(22)17

As the international tokamak ITER is being built, non-linear MHD simulations are playing an essential role in active research, understanding, and prediction of tokamak plasmas for the realisation of a fusion power plant. The development of MHD codes like JOREK is a key aspect of this research effort, and provides invaluable insight into the plasma …

Preprint
2022
UKAEA-CCFE-PR(22)15

Heat exchangers have manifold applications, from micro-electronics to nuclear fusion reactors. Their required performance expectations will continue to increase in line with the power consumption and miniaturisation of technology. Additive manufacturing enables the creation of novel, compact heat exchangers with greater surface-to-volume ratios and…

Preprint
2022
UKAEA-CCFE-PR(22)16

The contribution provides a concise overview of ion beam analysis methods and pro- cedures in studies of materials exposed to fusion plasmas in controlled fusion devices with magnetic confinement. An impact of erosion-deposition processes on the morphology of wall materials is- presented. In particular, results for deuterium analyses are discussed.…

Preprint Published
2022
UKAEA-CCFE-PR(22)14

Helium ash alpha-particles at  100keV in magnetically confi ned fusion plasmas may have the same Larmor radius, as well as cyclotron frequency, as the energetic beam-injected deuterons that heat the plasma. While the velocity-space distribution of the helium ash is monotonically decreasing, that of the energetic deuterons is a delta-function in…

Preprint