Conference Papers

Showing 1 - 9 of 9 Conference Paper Results
2020
UKAEA-CCFE-CP(21)05
47th EPS Plasma Physics Virtual Conference, 21-25 June 2021

The disruption mitigation system at ITER will include four shattered pellet injectors (SPI), which will be dedicated to the mitigation of electro-magnetic loads (EML), thermal loads and the avoidance and suppression of runaway electrons. Recently the JETILW was equipped with an SPI with a wide capability. Specifically: pellet diameter d = [4.57, 8.…

Preprint
2018
UKAEA-CCFE-CP(20)95
45th European Physical Society Conference on Plasma Physics (EPS), Prague, 2-6 July 2018

Preprint Published
2018
UKAEA-CCFE-CP(20)94
45th European Physical Society Conference on Plasma Physics (EPS), Prague, 2-6 July 2018

Edge localised modes (ELMs) are magneto-hydrodynamic (MHD) instabilities that drive filamentary plasma eruptions in high confinement tokamak discharges [1]. Gaining an improved understanding of ELMs is important [2]; in future fusion reactors such as ITER, ELM heat fluxes will need to be limited to ensure durability of divertor materials [3]. A …

Preprint Published
2018
UKAEA-CCFE-CP(20)72
27th IAEA Fusion Energy Conference, Ahmedabad, India, 22-27 October 2018

The spherical torus/tokamak (ST) is a potentially attractive configuration for narrowing scientific and technical gaps to a fusion demonstration power plant and as a more compact and/or modular fusion power source. Due to a reduced plasma surface area to volume ratio, the ST configuration offers the potential to access high power exhaust heat fl…

Preprint
2020
UKAEA-CCFE-CP(19)47
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

Spherical Tokamaks (STs) could provide a route towards a compact fusion reactor due to advantageous properties such as high plasma beta. A GW-scale ST plasma is explored where Q=10 and R=2.5m. In this design 110 MW of NBI is needed to provide 9 MA of noninductive current, where the remaining 12 MA is pressure driven. To penetrate into the core a 1 …

Preprint Published
2019
UKAEA-CCFE-CP(19)53
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

During edge localised modes (ELMs) high heat fluxes are incident on divertor targets, which future fusion devices will not withstand [1]. A solution to reduce the heat fluxes could be the new Super-X divertor, which will be tested on the MAST-U tokamak. The divertor has an increased connection length, magnetic flux expansion and is designed to reta…

Preprint Published
2019
UKAEA-CCFE-CP(19)51
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

H-mode tokamak plasmas are typically characterised by quasi-periodic instabilities called edge localised modes (ELMs) driven by unstable peeling-ballooning modes [1]. For large scale fusion power plants, the predicted particle and heat fluxes are unacceptable, and an active ELM control method is required. One promising method relies on t…

Preprint Published
2019
UKAEA-CCFE-CP(19)45
14th International Symposium on Fusion Nuclear Technology (ISFNT-14) Budapest,Hungary, 22-27 September 2019

Spherical Tokamaks offer a number of potential advantages for a future fusion power plant. They have a high ratio of thermal to magnetic field pressure (beta) and strong flows, either of which could result in reduced turbulence. Fewer Toroidal Field (TF) coils and a different geometry offers the potential for new methods of remote maintenance …

Preprint Purchase
The published version of this paper is currently under embargo and will be available on 14/02/2022
2019
UKAEA-CCFE-CP(19)19
45th European Physical Society Conference on Plasma Physics (EPS), Prague, 2-6 July 2018

The nonlinear phase of MHD ballooning modes determines whether they are essentially benign or disruptive. Disruptive or hard limits are produced by ballooning modes across magnetic confinement fusion, for example; as ELMs, some tokamak disruptions [1], and perhaps the LHD Core Density Collapse [2]. This work improves our understanding of how these …

Preprint Published