
UKAEACCFECP(23)672023
The fusion reaction between deuterium and tritium, D(T,n)4He is the main source of energy in future thermonuclear reactors. Charged fusion products of this reaction, αparticles (4Heions), are born with an average energy of 3.5 MeV. Transferring energy to the thermal plasma during their slowing down, the…

UKAEACCFECP(23)642023
The fusion reaction between deuterium and tritium, D(T,n)4He is the main source of energy in future thermonuclear reactors. Charged fusion products of this reaction, αparticles (4Heions), are born with an average energy of 3.5 MeV. Transferring energy to the thermal plasma during their slowing down, the…

UKAEACCFEPR(22)282022
A new quasilinear saturation model SAT3 has been developed for the purpose of calculating radial turbulent fluxes in the core of tokamak plasmas. The new model is shown to be able to better recreate the isotope mass dependence of nonlinear gyrokinetic fluxes compared to contemporary quasilinear models, including SAT2 [1], whilst performing at least…

UKAEACCFECP(23)612021
The relative role of particle transport and edge fuelling in setting the Hmode density pedestal is still a key open question [1]. Although reduced pedestal models have proven successful in predicting the pedestal pressure for a wide range of plasma scenarios [2,3,4], they lack a first principle based, predictive model for the edge density. Pred…

UKAEACCFEPR(21)292021
The verification and calibration of a new quasilinear transport model with a large database of gyrokinetic turbulence simulations is presented in this paper. In a previous paper [1], a model for the saturated spectrum of electric potential fluctuations was developed based on the properties of the nonlinear 3D spectrum. In this paper, a modificat…

UKAEACCFEPR(21)042021
In preparation for the upcoming MASTU campaign, pedestal stability of spherical tokamaks is revisited by investigating standard Hmode discharges on MAST. As a step beyond previous studies, both ion and electron profiles are used for obtaining equilibria and a diverse set of pedestals is evaluated. Stability analysis with the ELITE and CGYRO codes…

UKAEACCFEPR(20)1162020
The findings of an investigation into the properties of the three dimensional (3D) saturated fluctuation intensity of the electric potential in gyrokinetic turbulence simulations is presented. Scans in flux surface elongation and Shafranov shift are used to isolate the tokamak geometric dependencies. The potential intensity required in order to …

UKAEACCFEPR(19)752019
The evolution of the JET high performance hybrid scenario, including central accumulation of the tungsten (W) impurity, is reproduced with predictive multichannel integrated modelling over multiple confinement times using firstprinciple based models. 8 transport channels are modelled predictively, with selfconsistent sources, radiation and magne…

UKAEACCFECP(18)022018

UKAEACCFEPR(18)512018
An effect due to fusion born triton production has been observed in JET highperformance deuterium plasma discharges with NBI and Hminority ICRF heating, using DD and DT neutron spectrometry as well as fusion product loss measurements. The observations show that increase of the triton burn up rate leads to decrease of second harmonic ωcH
Showing 1  10 of 16 UKAEA Paper Results