All Papers - UKAEA Scientific Publications

Showing 1 - 10 of 19 UKAEA Paper Results

UKAEA-CCFE-PR(25)2892023

"Core-edge integrated neon-seeded scenario in deuterium-tritium at JET"
- C. Giroud
- I.S. Carvalho
- S. Brezinsek
- A. Huber
- D. Keeling
- J. Mailloux
- R.A. Pitts
- E. Lerche
- R. Henriques
- J. Hillesheim
- K. Lawson
- M. Marin
- E. Pawelec
- M. Sos
- H.J> Sun
- M. Tomes
- S. Aleiferis
- A. Bleasdale
- M. Brix
- A. Boboc
- J. Bernardo
- P. Carvalho
- I. Coffey
- S. Henderson
- F. Rimini
- M. Maslow
- E. Alessi
- T. Craciunescu
- M. Fontana
- J.M. Fontdecaba
- L. Garzotti
- L. Horvath
- I. Jepu
- J. Karhunen
- D. Kos
- E. Litherland-Smith
- A. Meigs
- S. Menmuir
- R.B. Morales
- S. Novak
- E. Peluso
- T. Pereira
- V. Paroli
- G. Pucella
- D. Refy
- S. Scully
- M. Sertoli
- S. Silburn
- D. Taylor
- B. Thomas
- A. Tookey
- Z. Stancar.
- G. Szepesi
- B. Viola
- A. Widdowson
- JET contributors
This paper reports the first experiment carried out in deuterium–tritium addressing the integration of a radiative divertor for heat-load control with good confinement. Neon seeding was carried out for the first time in a D–T plasma as part of the second D–T campaign of JET with its Be/W wall environment. The technical difficulties linked to …
- Published
UKAEA-CCFE-PR(23)1812023

"isotope physics of heat and particle transport with tritium in JET-ILW H-mode plasmas"
During the DTE2 campaign in the JET tokamak we performed a parameter scan in T and D-T complementing existing pulses in H and D. For the different main ion masses H-modes at fixed plasma current and magnetic field can have the pedestal pressure varying by a factor of 4 and the total pressure changing from betaN = 1.0 to 3.0. Based on this wide data…
- Preprint
- Published
UKAEA-CCFE-PR(23)1802023

"L-H transition studies in recent Tritium and Deuterium-Tritium campaigns at JET"
- E.R. Solano
- G. Birkenmeier
- C. Silva
- E. Delabie
- J.C. Hillesheim
- A. Baciero
- I. Balboa
- M. Baruzzo
- A. Boboc
- M. Brix
- C. Bourdelle
- I.S. Carvalho
- P. Carvalho
- C.D. Challis
- M. Chernyshova
- A. Chomiczewska
- R. Coelho
- T. Craciunescu
- E. de la Cal
- E. de la Luna
- R. Dumont
- P. Dumortier
- M. Fontana
- J.M. Fontdecaba
- L. Frassinetti
- D. Gallart
- J. Garcia
- C. Giroud
- W. Gromelski
- R.B. Henriques
- J. Hall
- A. Ho
- L. Horvath
- P. Jacquet
- I. Jepu
- E. Joffrin
- A. Kappatou
- P.J. Lomas
- D.L. Keeling
- D.B. King
- E. Kowalska-Strzęciwilk
- M. Lennholm
- E. Lerche
- E. Litherland-Smith
- V.G. Kiptily
- K.K. Kirov
- A. Loarte
- B. Lomanowski
- C.F. Maggi
- J. Mailloux
- M.J. Mantsinen
- M. Maslov
- A.G. Meigs
- I. Monakhov
- R.B. Morales
- A.H. Nielsen
- D. Nina
- C. Noble
- E. Pawelec
- M. Poradzinski
- G. Pucella
- P. Puglia
- D. Réfy
- J.J. Rasmussen
- E. Righi-Steele
- F.G. Rimini
- T. Robinson
- M. Sertoli
- S.A. Silburn
- P. Sirén
- Ž. Štancar
- H.J. Sun
- G. Szepesi
- D. Taylor
- B. Thomas
- E. Tholerus
- G. Verdoolaege
- P. Vincenzi
- B. Viola
- N. Vianello
- T. Wilson
- Preprint
- Published
UKAEA-CCFE-PR(22)312022

"The broadening of SOL profiles in JET tritium plasma and its impact on machine operation"
- HJ. Sun
- SA. Silburn
- IS. Carvalho
- C Giroud
- G Fishpool
- GF. Matthews
- DB. King
- RB. Henriques
- DL. Keeling
- FG. Rimini
- L. Garzotti
- D. Frigione
- D. Van Eester
- D Kos
- M-L. Mayoral
- J. Mailloux
- C. Maggi
- A. Huber
- D. Douai
- PJ. Lomas
- L Morten
- M. Maslov
- K. Kirov
- P. Jacquet
- CG. Lowry
- M. Baruzzo
- C. Stuart
- J. Mitchell
- L. Horvath
- DC. McDonald
- JET Contributors
Unusually high power loads on the Beryllium limiter caused by Neutral Beam re-ionisation, and much cooler divertor target surfaces were observed during the recent JET tritium campaign. As both phenomena are driven by scrape-off layer (SOL) physics, the SOL features of 72 tritium H-mode discharges and their deuterium references have been studied. …
- Preprint
- Published
UKAEA-CCFE-PR(22)092022

"THE DEPENDENCE OF CONFINEMENT ON THE ISOTOPE MASS IN THE CORE AND THE EDGE OF AUG AND JET-ILW H-MODE PLASMAS"
Experiments in ASDEX Upgrade (AUG) and JET with the ITER-like wall (JET-ILW) are performed to separate the pedestal and core contributions to confinement in H-modes with different main ion masses. A strong isotope mass dependence in the pedestal is found which is enhanced at high gas puffing. This is because the ELM type changes when going fro…
- Preprint
- Published
UKAEA-CCFE-CP(23)612021

"Pedestal particle balance studies in JET-ILW H-mode plasmas"
- L. Horvath
- M. Maslov
- P.A. Schneider
- C.F. Maggi
- L.Frassinetti
- B. Lomanowski
- R.B. Morales
- D. Nina
- S. Saarelma
- J. Simpson
- G. Corrigan
- D.I. Refy
- M.Brix
- T. Pereira
- M. Vecsei
- JET Contributors
The relative role of particle transport and edge fuelling in setting the H-mode density pedestal is still a key open question [1]. Although reduced pedestal models have proven successful in predicting the pedestal pressure for a wide range of plasma scenarios [2,3,4], they lack a first principle based, predictive model for the edge density. Pred…
- Preprint
- Published
UKAEA-CCFE-PR(23)1042021

"Studying pedestal characteristics in MAST ELMy regimes in preparation for future spherical tokamaks"
- S.F. Smith
- A. Kirk
- B. Chapman
- J. G. Clark
- C.J. Ham
- L. Horvath
- C. F. Maggi
- R. Scannell
- S. Saarelma
MAST pedestal data has been analysed, where a pedestal database of 892 shots was obtained, using the new upgraded MAST Thomson Scattering (TS) diagnostic. Various ELM types are discussed, where characteristics and trends of MAST pedestals are shown. The data from the upgraded TS diagnostic confirms pedestal characteristics found in earlier analy…
- Preprint
UKAEA-CCFE-PR(23)1022021

"The role of slab-ETG modes in JET-ILW pedestals with varying levels of power and fuelling"
We present the results of GENE gyrokinetic calculations based on a series of JET-ILW type I ELMy H-mode discharges operating with similar experimental inputsbut at different levels of power and gas fuelling. We show that turbulence due to slab electron-temperature-gradient modes (sETGs) produces a significant amount of heat flux in four JET-ILW …
- Published
UKAEA-CCFE-CP(23)132021

"High Performance ITER-baseline discharges in Deuterium with nitrogen and neon-seeding in the JET-ILW"
- C. Giroud
- S. Brezinsek
- R. Pitts
- I.S. Carvalho
- A. Huber
- E. Kaveeva
- D. Keeling
- J. Mailloux
- S. Aleiferis
- B. Chapman
- S. Henderson
- L. Garzotti
- E. Lerche
- M. MArin
- M. Maslov
- M. Brix
- P. Carvalho
- I. Coffey
- J. Fontdecaba
- L. Horvath
- I. Jepu
- J. Karhunen
- E. Litherland-Smith
- A. Meigs
- R.B. Morales
- T. Pereira
- D. Refy
- Z. Stancar
- M. Sertoli
- S. Silburn
- G. Szepesi
- A. Thorman
- M. Tomes
- I. Veselova
- B. Viola
- S. Wiesen
- JET contributors,
JET has investigated one the key issues for the baseline scenario in ITER, the integration of a radiative divertor for heat load control with the use of neon and nitrogen as seed impurity. A characterization of the choice of the impurity seed on plasma confinement, neutrons, pedestal MHD stability, pedestal instabilities, core transport is given…
- Preprint
UKAEA-CCFE-CP(23)112020

"Isotope identity experiments in JET with ITER-like wall"
- CF Maggi
- H Weisen
- F Casson
- F Auriemma
- R Lorenzini
- H Nordman
- E. Delabie
- J Flanagan
- D Keeling
- D King
- L Horvath
- M Maslov
- S Menmuir
- A Salmi
- PA Schneider
- G Sips
- T Tala
- JET Contributors
Dimensionless experiments test the invariance of plasma physics to changes in the dimensional plasma parameters, when the canonical dimensionless parameters are conserved [1], [2]. Isotope identity experiments exploit the change in isotope ion mass A = mi/mp to obtain plasmas with identical dimensionless profiles in the same tokamak. However, condi…
- Preprint

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