UKAEA Papers

Showing 1 - 9 of 9 UKAEA Paper Results
2022
UKAEA-CCFE-PR(22)13

A local flux expansion method has been proposed for estimating the strike point position for the advanced divertor configuration on MAST Upgrade tokamak. The paper discusses the application and assesses the performance of the technique on a long-legged divertor plasma configuration on an operating device – the DIII-D tokamak. A comparison of …

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The published version of this paper is currently under embargo and will be available on 07/03/2024
2021
UKAEA-CCFE-PR(21)79

Reconstructions of plasma equilibria using magnetic sensors and a Dα constraint were routine during operation of the MAST spherical tokamak, but reconstructions using kinetic profiles was not. These are necessary for stability and disruption analysis of the MAST database, as well as going forward for operation in the upgrade to the device, MAST…

Preprint Published
2021
UKAEA-CCFE-PR(21)69

The ASCOT orbit-following code has been equipped with a model for simulating charge exchange (CX) of fast ions with background atoms in magnetically confined fusion plasmas. The model was successfully verified by comparing simulated reaction mean free paths to analytical values across a range of fusion-relevant parameters. ASCOT was used to simulat…

Preprint Published
2021
UKAEA-CCFE-CP(21)02

Measurements made using flush-mounted Langmuir probes (FMPs) in tokamaks are difficult to interpret when operating at grazing angles of magnetic field incidence due to the effects of sheath expansion on the probe collection area. The super-X divertor on the upgraded Mega Ampere Spherical Tokamak (MAST-U) will have very shallow angles of magnetic fi…

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The published version of this paper is currently under embargo and will be available on 22/02/2023
2020
UKAEA-CCFE-CP(20)111

The Mega Amp Spherical Tokamak (MAST) is currently being extensively upgraded to provide a system that will be able to add to the knowledge base for ITER as well as testing innovative reactor systems such as the Super-X divertor. MAST-U will have increased coil system and power supply capability. Therefore, to ensure operation of MAST-U within safe…

Preprint Published
2020
UKAEA-CCFE-PR(20)10

Fusion Power is generated by harnessing the energy released by replicating the fusion processes that happen within stars e.g. The Sun. The Sun uses hydrogen as a fuel and the core temperature of our Sun is estimated to be 15million°C, however the fusion rate for hydrogen is very slow, in order to generate power by the fusion within a machine on…

Preprint Published
2018
UKAEA-CCFE-PR(18)59

A Neutron Camera (NC) was used on the Mega Ampere Spherical Tokamak (MAST) to measure the DD neutron emissivity along four collimated lines of sight, two on-axis and two off-axis, all viewing the plasma in tangential direction. The encouraging results obtained suggested that an upgraded NC for MAST-U would provide fundamental information for the st…

Preprint Published
2014

A plasma vertical control system able to control high elongation (∼2.5) plasmas at moderate internalinductance (∼0.9) is analysed, including both active and passive components in a closed loop system.The analysis is based on the RZIp rigid plasma model and this is extensively validated using present dayMAST discharges, especially at the limits …

Published