-
UKAEA-CCFE-PR(26)4142025
One of the main objectives of the ITER experiment is to demonstrate stable operation with a scientific fusion Q ~ 10 for up to 500 s. The ITER 5.3T/15MA DT-plasma scenario is designed for this purpose. Operation of the full pulse consists of several non-trivial steps. The paper considers specifically the challenges of ramp-up and flat-top operation…
-
UKAEA-CCFE-PR(25)3822025
The plasma energy and particle flows in double-null configurations during MAST L-mode discharges are investigated using the 3D plasma turbulence code STORM. The modelling reproduces key phenomena, such as in-out and up-down heat load asymmetries, despite not having a sophisticated neutral model. Turbulent energy transport, driven by ballooning-like…
-
UKAEA-CCFE-CP(25)252024
The integrated modelling tool JINTRAC [1] was recently updated and now has the unique capability of fully consistent treatment of Deuterium and Tritium in the whole plasma volume. In this work this is utilized with coupled core-SOL-divertor simulations performed for the ITER 15MA/5.3T DT Q=10 scenario. The work is built on previous simulations publ…
-
UKAEA-CCFE-PR(25)2942024
By use of Lagrangian tracers propagated on 2D simulations of Scrape-Off Layer (SOL) turbulence, we are able to determine the non-local fractional-advection, fractional-diffusion equation (FADE) coefficients for a number of equilibrium cases- Solution of the resultant FADEs shows good agreement with the simulation mean density profiles. We detail…
-
UKAEA-STEP-PR(24)182024
This paper presents a comprehensive overview of the preliminary divertor design and plasma exhaust scenario for the reactor-class Spherical Tokamak for Energy Production (STEP) project. Due to the smaller size of the machine, with a major radius less than half that of most DEMO concepts, the current design features a double-null divertor geometr…
-
UKAEA-CCFE-PR(24)032024
To design a safe termination scenario for a burning ITER plasma is a challenge that requires extensive core plasma and divertor modelling. The presented work consists of coupled core/edge/SOL/divertor simulations, performed with the JINTRAC code, studying the Q=10 flat-top phase and exit phase of the ITER 15MA/5.3T DT scenario. The modelling uti…
-
UKAEA-CCFE-CP(26)402023
A key objective of fusion research is to develop pathways to integrate good confinement in the core and pedestal with strong dissipation of power and particles in the divertor through a combination of experimental demonstration and modelling. The MAST Upgrade spherical tokamak has unique capabilities to find solutions to this integration challeng…
-
UKAEA-CCFE-PR(25)2682023
In the initial stages of ITER operation, ELM mitigation systems need to be commissioned. This requires controlled flat-top operation in type-I ELMy H-mode regimes. Hydrogen or helium plasma discharges are used exclusively in these stages to ensure no production of neutrons from fusion reactions. With the expected higher L-H power threshold of hy…
-
UKAEA-CCFE-PR(25)2642023
Advances in edge and scrape-off layer diagnostics have shown that often the ion temperature is higher than the electron temperature in scrape-off layer filaments. We have therefore extended the STORM model beyond the cold ion limit commonly used, to include hot ion effects. We find that filaments are both faster and more coherent than in a cold …
-
UKAEA-CCFE-PR(24)2622023
STORM is a plasma turbulence code capable of simulating 3d turbulence across the full scrape-off layer of a tokamak fusion reactor, using a drift reduced, collisional fluid model. STORM uses mostly finite difference schemes, with a staggered grid in the direction parallel to the magnetic field. We describe the model, geometry and initialisation opt…
Showing 1 - 10 of 74 UKAEA Paper Results