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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Between 1995 and 2009, electron temperature (Te) measurements of more than15000 plasmas produced in the Joint European Torus (JET) have been carefullyreviewed using the two main diagnostics available over this time period:Michelson interferometer and Thomson scattering systems. Long term stability ofJET Te is experimentaly observed by defining the ECE TS ratio as the ratio ofcentral Te measured by Michelson and LIDAR.  This paper, based on a careful review of Te measurement from 15 years of JETplasmas, concludes that JET Te exhibits a 15-20% effective uncertainty mostlymade of large-scale temporal drifts, and an overall uncertainty of 16-22%.  Variations of 18 plasma parameters are checked in another data set, made of a"reference data set" made of ohmic pulses as similar as possible between 1998and 2009. Time drifts of ECE TS ratios appear to be mostly disconnected fromthe variations observed on these 18 plasma parameters, except for the very lowamplitude variations of the field which are well correlated with off-plasmavariations of a 8-channel integrator module used for measuring many magneticsignals from JET.  From mid-2002 to 2009, temporal drifts of ECE TS ratios are regarded ascalibration drifts possibly caused by unexpected sensitivity to unknownparameters; the external temperature on JET site might be the best parametersuspected so far.  Off-plasma monitoring of MI made of calibration performed in the laboratoryare reported and do not appear to be clearly correlated with drifts of ECE TSratio and variations of magnetics signals integrators. Comparison ofestimations of plasma thermal energy for purely Ohmic and NBI-only plasmas doesnot provide any definite information on the accuracy of \mi or \lidarmeasurements.  Whatever causes these Te drifts, this experimental issue is regarded ascrucial for JET data quality.

Large-scale drifts observed on electron temperature measurements on JET plasmas