Conference Papers

Showing 1 - 6 of 6 Conference Paper Results
2019
UKAEA-CCFE-CP(19)52
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

The presence of Error Fields (EFs) in magnetic fusion devices can affect energy confinement and plasma stability by braking plasma rotation, by inducing fast particle losses and being amplified when exploring high-b regimes. The resulting EF Locked Modes (LMs) can be stabilized by NBI injection through the rotation shielding mechanism. However, the…

Preprint
2019
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
2019
UKAEA-CCFE-CP(19)33
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

The initial Ohmic current ramp phase of JET hybrid plasmas, including a current ‘overshoot’ before the main heating, is used to optimise the q-profile shape to allow access to high β and avoid MHD instabilities [1]. Such hybrid plasmas have never been operated using tritium (T) or mixed deuterium-tritium (D-T) fuel. However, experiments with i…

Preprint
2018
UKAEA-CCFE-CP(18)03
27th IAEA Fusion Energy Conference, Ahmedabad, India, 22-27 October 2018

Recent results from MAST address key physics issues for ITER operations and the design of future devices, by advancing our understanding of through analysis of high-resolution data and numerical modelling. Modelling of the interaction between filaments with BOUT++ indicates filaments separated by more than 5x their width move independently, and …

Preprint
2018
UKAEA-CCFE-CP(18)02
27th IAEA Fusion Energy Conference, Ahmedabad, India, 22-27 October 2018

The evolution of the JET high performance hybrid scenario, including the central accumulation of tungsten (W) impurity on axis, is reproduced with predictive multi-channel integrated modelling over multiple confinement times using transport models derived from first principles [1].

Preprint
2018
UKAEA-CCFE-CP(18)01
45th European Physical Society Conference on Plasma Physics (EPS), Prague, 2-6 July 2018

The dependence of JET neutron deficit and energy balance on neutral beam (PINI) selection has been investigated experimentally. The discrepancy between neutrons predicted and measured during JET pulses has consistently deviated, with the measured neutrons typically being lower than expected by simulation. A number of investigations into this hav…

Preprint