Conference Papers

Showing 1 - 4 of 4 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)41
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

An n = 1 locked, or slowly rotating, mode has been observed in most pulses prior to JET disruptions. However, a small fraction of non-disruptive pulses has a locked mode which eventually vanishes without disruption. Hence, on JET the locked mode amplitude is routinely used as an indicator of unhealthy plasma. There are two threshold levels…

Preprint
2019
UKAEA-CCFE-CP(19)35
46th European Physical Society Conference on Plasma Physics (EPS), Milan, 8-12 July 2019

In high-performance, ITER baseline-scenario pulses (3MA/2.7T) in JET-ILW with high levels (~ 32 MW) of heating power, typically ~ 20-40% of the input power is radiated, predominantly by W impurities, which are sputtered from the divertor targets and reach the confined plasma. Sustained ELMy H-mode operation at such high heating power in JET-ILW req…

Preprint
2019
UKAEA-CCFE-CP(19)30
30th Symposium on Fusion Technology (SOFT), Giardini Naxos, Messina, Sicily, 16-21 September 2018

The JET Real-Time Protection Sequencer (RTPS) co-ordinates responses for magnetic and kinetic actuators to protect the ITER-Like Wall from possible melting events and other undesirable scenarios. It allows programmable stop responses per pulse, based on alarms raised by other systems. The architecture combines a modular run-time application deve…

Preprint