English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The application of non-axisymmetric resonant magnetic perturbations (RMPs) tolow current plasmas in the Mega Amp Spherical Tokamak (MAST) was found to becorrelated with substantial drops in neutron production, suggesting asignificant degradation of fast ion confinement. The effects of suchperturbations on fast ions in MAST have been modelled using a revised versionof a non-steady-state orbit-following Monte-Carlo code (NSS OFMC), in which theparametrization of fusion reaction rates has been updated and neutron rateshave been recalculated. Losses of fast ions via charge-exchange (CX) withbackground neutrals and the subsequent reionization of fast neutrals due tocollisions with bulk plasma particles have also been taken into account. Theeffects of the plasma response to externally-applied RMPs have been included inthe modelling. The updated results show that computed neutron rates in thepresence of RMPs with the plasma response and CX reactions taken into accountagree very well with the experimental data throughout the analysis target time.CX reactions play an important role in determining the neutron rates, inparticular before the onset of RMPs.

plasma physics and controlled fusion

The effects of resonant magnetic perturbations and charge-exchange  reactions on fast ion confinement and neutron emission in the Mega Amp  Spherical Tokamak