All Papers - UKAEA Scientific Publications

Showing 1 - 6 of 6 UKAEA Paper Results

UKAEA-CCFE-CP(23)492022

"Improved accuracy and robustness of electron density profiles from JET’s FMCW reflectometers"
- R. B. Morales
- A. Salmi
- P. Abreu
- C. H. S. Amador
- P. Carman
- J. Fessey
- J. Flanagan
- M. Fontana
- C. Giroud
- S. Hacquin
- S. Heuraux
- L. Meneses
- R. Sabot
- A. Silva
- A. Sirinelli
- G. Szepesi
- D. Taylor
- D. Terranova.
JET’s frequency-modulated continuous-wave (FMCW) reflectometers have been operating well with the current design since 2005 and density profiles are being automatically calculated intershot since then[1]. However, the calculated profiles had long suffered from several shortcomings – poor agreement to other diagnostics; sometimes inappropriat…
- Preprint
- Published
UKAEA-CCFE-CP(21)072021

"Mitigation of disruption electro-magnetic load with SPI on JET-ILW"
- S.N. Gerasimov
- P. Abreu
- L.R. Baylor
- A. Boboc
- I.S. Carvalho
- I.H. Coffey
- D. Craven
- V. Huber
- S. Jachmich
- E. Joffrin
- U. Kruezi
- M. Lehnen
- P.J. Lomas
- A. Manzanares
- M. Maslov
- E. Matveeva
- G. Pautasso
- A. Peacock
- S. Silburn
- C. Stuart
- H. Sun
- D. Shiraki
- R. Sweeney
- J. Wilson
- L.E. Zakharov
The disruption mitigation system at ITER will include four shattered pellet injectors (SPI), which will be dedicated to the mitigation of electro-magnetic loads (EML), thermal loads and the avoidance and suppression of runaway electrons. Recently the JETILW was equipped with an SPI with a wide capability. Specifically: pellet diameter d = [4.57, 8.…
- Preprint
UKAEA-CCFE-PR(19)202019

"Overview of disruptions with JET-ILW"
- Sergei Gerasimov
- P. Abreu
- G Artaserse
- M. Baruzzo
- P. Buratti
- I.S. Carvalho
- I.H. Coffey
- E. de la Luna
- T.C. Hender
- R.B. Henriques
- R. Felton
- U. Kruezi
- P.J. Lomas
- P. McCullen
- M. Maslov
- E. Matveeva
- S. Moradi
- L. Piron
- F.G. Rimini
- W. Schippers
- G. Szepesi
- M. Tsalas
- L.E. Zakharov
The paper presents an analysis of disruptions occurring during JET-ILW plasma operations covering the period from the start of ILW (ITER-like wall) operation up to completion of JET operation in 2016. The total number of disruptions was 1951 including 466 with deliberately induced disruptions. The average disruption rate of unintended disruptions i…
- Preprint
- Published
CCFE-PR(16)792016

"Electron cyclotron emission spectra in X- and O-mode polarisation at JET: Martin- Puplett interferometer, absolute calibration, revised uncertainties, inboard/outboard temperature profile, and wall properties"
- S. Schmuck
- J. Fessey
- J. E. Boom
- L. Meneses
- P. Abreu
- E. Belonohy
- I. Lupelli
At the tokamak Joint European Torus (JET), the electron cyclotron emission spectra in O-mode and X-mode polarisations are diagnosed simultaneous in absolute terms for several harmonics with two Martin-Puplett interferometers. From the second harmonic range in X-mode polarisation, the electron temperature profile can be deduced for the outboard side…
- Preprint
- Published
CCFE-PR(15)302015

"JET and COMPASS Asymmetrical Disruptions"
- S.N. Gerasimov
- P. Abreu
- M. Baruzzo
- V. Drozdov
- A. Dvornova
- J. Havlicek
- T.C. Hender
- O. Hronova
- U. Kruezi
- X. Li
- T. Markovič
- R. Pánek
- G. Rubinacci
- M. Tsalas
- S. Ventre
- F. Villone
- L.E. Zakharov
- JET Contributors
Asymmetrical disruptions may occur during ITER operation and they may be accompanied by large sideways forces and rotation of the asymmetry. This is of particular concern because resonance of the rotating asymmetry with the natural frequencies of the vacuum vessel (and other in-vessel components) could lead to large dynamic amplification of the for…
- Preprint
- Published
CCFE-PR(17)402015

"Provenance Metadata Gathering and Cataloguing of EFIT++ Code Execution"
- I. Lupelli
- D.G.Muir
- L. Appel
- R. Akers
- M. Carr
- P. Abreu
Journal publications, as the final product of research activity, are the result of an extensive complex modelling and data analysis effort. It is of paramount importance, therefore, to capture the origins and derivation of the published data in order to achieve high levels of scientific reproducibility, transparency, internal and external data reus…
- Preprint
- Published

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"Improved accuracy and robustness of electron density profiles from JET’s FMCW reflectometers"

"Mitigation of disruption electro-magnetic load with SPI on JET-ILW"

"Overview of disruptions with JET-ILW"

"Electron cyclotron emission spectra in X- and O-mode polarisation at JET: Martin- Puplett interferometer, absolute calibration, revised uncertainties, inboard/outboard temperature profile, and wall properties"

"JET and COMPASS Asymmetrical Disruptions"

"Provenance Metadata Gathering and Cataloguing of EFIT++ Code Execution"

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