A. Boboc J. Macdonald R. Felton Mark J Brown W Studholme S Cramp the JET Operators
Originally designed for five years of plasma operations, the JET Far Infrared (FIR) interferometer/polarimeter diagnostic system is still operating at its full capabilities nearly forty years later and in ITER relevant conditions, albeit with significantly lower neutron fluences and for several D-T campaigns. The original design changed substantial…
PreprintO. Myatra B. Lipschultz D. Moulton K. Verhaegh B. Dudson S. Orchard A. Fil C. Cowley
Control of the detachment front between the target and the X-point is necessary for minimizing the effect of detachment on the core plasma (core radiation and loss of confinement) and maximizing the divertor functions (reduction of target heat load and sputtering, He pumping). However, such control has been difficult in experiments. The SOLPS-ITER …
PreprintE. Nasr S. Wimbush P Noonan P. Harris R. Gowland & A. Petrov
Spherical Tokamak for Energy Production (STEP) requires high-field magnet designs and has therefore adopted REBCO-based high temperature superconductor (HTS). HTS enables the Toroidal Field (TF) coils to be re-mountable, which unlocks STEP’s vertical maintenance approach, however, re-mountable joints, approximately 18 GJ of stored energy, and lim…
PreprintD. Kennedy M. Giacomin B. Patel C. M. Roach D. Dickinson
The importance of parallel magnetic field perturbations in gyrokinetic simulations of electromagnetic instabilities and turbulence at mid-radius in the burning plasma phase of the conceptual high-β, reactor-scale, tight-aspect-ratio tokamak STEP is discussed. Previous studies have revealed the presence of unstable hybrid kinetic ballooning modes (…
PreprintA. Fil L. Henden S. Newton T. Hender M. Hoppe
Generation of Runaway Electrons during plasma disruptions, and their potential impact on the plasma facing components, is of great concern for ITER and future reactors based on the tokamak concept. The STEP (Spherical Tokamak for Energy Production) programme aims at producing net energy from a prototype fusion energy plant. At its current design po…
PreprintJonathan Keep Chris Harrington Steven Killingbeck Stuart Muldrew Chris Waldon
The STEP design space is an intimidating and hostile arena to operate with extensive uncertainties in the pathway heightened by many moving parts, causality breakdown, and multiple significant decisions to be made. Many strongly interacting elements (tensions) of the requirements/constraints and the design within the physics, technology and enginee…
PreprintJ. R. Harrison C. Bowman J. G. Clark A. Kirk B. S. Patel P. Ryan R. Scannell A. J. Thornton K. Verhaegh
The integration of good core and edge/pedestal confinement with strong dissipation of heat and particles in the divertors is a significant challenge for the development of fusion energy. Alternative divertor configurations offer potential advantages by broadening the operational space where a device can operate with detached divertors and acce…
PreprintJames Roberts Ross MacDonald Alex Russell James Redman Ian Bunce Terry O’Sullivan Ethan Flynn
In future demonstration fusion power plants, plasma facing components will face high steady state and ultra-high transient heat loads from the plasma. Introducing low thermal conductivity features to the component can reduce the peak temperatures seen by the coolant pipe, but at the trade-off of a loss of steady-state performance. Producing low-…
PreprintJ. Foster H. Lux
Estimating costs of prototype or demonstration fusion power plants is difficult enough due to the often still preliminary designs combined with a non-existing supply chain for many bespoke technologies or materials. Extrapolating to commercial fusion power plants without a clear design is even harder and uncertainties are large. As a result, for…
PurchaseThomas Piercy Guido Herrmann Angelo Cangelosi Ioannis Dimitrios Zoulias Erwin Lopez
In current telerobotics and telemanipulator applications, operators must perform a wide variety of tasks, often with a high risk associated with failure. A system designed to generate data-based behavioural estimations using observed operator features could be used to reduce risks in industrial teleoperation. This paper describes a non-invasive …
Published