B. Labit
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View article: Edge radial electric field in positive and negative triangularity plasmas in the TCV tokamak
Edge radial electric field in positive and negative triangularity plasmas in the TCV tokamak Open
We present the first edge E r measurements in negative triangularity (NT) plasmas in the Tokamak à Configuration Variable (TCV). The Doppler backscattering measurements of reveal a significant impact of triangularity on the E r…
View article: First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak
First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak Open
Edge Localised Modes (ELMs) induced fast-ion losses have been characterised in the energy, E , and pitch, , space using a unique Fast Ion Loss Detector (FILD) on the tokamak à configuration variable. The FILD is equipped with a 1…
View article: Experimental characterization of inter-ELM modes in type-I ELMy scenarios at TCV using the thermal helium beam diagnostic
Experimental characterization of inter-ELM modes in type-I ELMy scenarios at TCV using the thermal helium beam diagnostic Open
The high confinement regime (H-mode) is considered fundamental for high-performance operation in next-step tokamaks. It is generally characterized by the occurrence of edge localized modes (ELMs), even though several no-ELM and small-ELM r…
View article: Isotope effects in linear and saturated ohmic confinement of TCV tokamak and gyrokinetic validation
Isotope effects in linear and saturated ohmic confinement of TCV tokamak and gyrokinetic validation Open
We investigated isotope effects during the tokamak à configuration variable (TCV) ohmic discharge of a diverted positive triangular shape configuration of deuterium (D) and hydrogen (H) plasmas. The transition from the linear ohmic confine…
View article: Low collisionality, peeling limited pedestals in JET-ILW: effect of density and isotope mass on pedestal structure, pedestal stability and pedestal prediction in deuterium and mixed deuterium/tritium plasmas
Low collisionality, peeling limited pedestals in JET-ILW: effect of density and isotope mass on pedestal structure, pedestal stability and pedestal prediction in deuterium and mixed deuterium/tritium plasmas Open
Pedestals limited by peeling instabilities have been reached in JET-ILW by operating at high , up to . The increase in via the increase of the toroidal field has stabilized the ballooning modes and has allowed to rea…
View article: Impact of the plasma boundary on machine operation and the risk mitigation strategy on JET
Impact of the plasma boundary on machine operation and the risk mitigation strategy on JET Open
This work examines the separatrix and Scrape-off-Layer (SOL) characteristics in three scenarios on JET: the Quasi-Continuous Exhaust (QCE) regime, the ITER Baseline scenario, and the X-point Radiator (XPR) regime. All three scenarios are p…
View article: Survey of the edge radial electric field in L-mode TCV plasmas using Doppler backscattering
Survey of the edge radial electric field in L-mode TCV plasmas using Doppler backscattering Open
A Doppler backscattering (DBS) diagnostic has recently been installed on the Tokamak à Configuration Variable (TCV) to facilitate the study of edge turbulence and flow shear in a versatile experimental environment. The dual channel V-band …
View article: L–H power threshold for neutral beam heated plasmas with deuterium, hydrogen, helium and mixed ion species in TCV
L–H power threshold for neutral beam heated plasmas with deuterium, hydrogen, helium and mixed ion species in TCV Open
A systematic study of the power threshold for L–H transition has been conducted in TCV. Only results from NB heated plasmas are reported. The dependencies of on plasma current, plasma density and main ion species have been investig…
View article: Overview of the third JET deuterium-tritium campaign
Overview of the third JET deuterium-tritium campaign Open
JET returned to deuterium-tritium operations in 2023 (DTE3 campaign), approximately two years after DTE2. DTE3 was designed as an extension of JET’s 2022-2023 deuterium campaigns, which focused on developing scenarios for ITER and DEMO, in…
View article: The quasi-continuous exhaust regime in ASDEX Upgrade and JET
The quasi-continuous exhaust regime in ASDEX Upgrade and JET Open
The quasi-continuous exhaust (QCE) regime is a type-I ELM-free high confinement regime obtained at high plasma shaping and high separatrix density. A comparison with various ELM-free regimes in the literature is presented together with pot…
View article: The quasi-continuous exhaust regime in JET
The quasi-continuous exhaust regime in JET Open
The quasi-continuous exhaust (QCE) regime is a regime that is naturally type-I ELM-free. It combines the high density at the plasma edge needed for power exhaust with the high normalised energy confinement typical for H-mode operation. In …
View article: Modelling of ETG turbulent transport in the TCV pedestal
Modelling of ETG turbulent transport in the TCV pedestal Open
Results of the first gyrokinetic simulations of the TCV pedestal are presented. Two discharges at varying levels of gas puffing are considered as input parameters for the local GENE simulations. Linear and nonlinear simulations are carried…
View article: Helium plasma operations on ASDEX Upgrade and JET in support of the non-nuclear phases of ITER
Helium plasma operations on ASDEX Upgrade and JET in support of the non-nuclear phases of ITER Open
For its initial operational phase, ITER has until recently considered using non-nuclear hydrogen (H) or helium (He) plasmas to keep nuclear activation at low levels. To this end, the Tokamak Exploitation Task Force of the EUROfusion Consor…
View article: Linking Edge Flows to the Magnetic Geometry Asymmetry in Tokamaks
Linking Edge Flows to the Magnetic Geometry Asymmetry in Tokamaks Open
International audience
View article: Study of impurity C transport and plasma rotation in negative triangularity on the TCV tokamak
Study of impurity C transport and plasma rotation in negative triangularity on the TCV tokamak Open
Carbon impurity transport is studied in the TCV tokamak using a charge exchange recombination diagnostic. TCVs flexible shaping capabilities were exploited to extend previous impurity transport studies to negative triangularity ( δ < 0). A…
View article: Overview of the EUROfusion Tokamak Exploitation programme in support of ITER and DEMO
Overview of the EUROfusion Tokamak Exploitation programme in support of ITER and DEMO Open
Within the 9th European Framework programme, since 2021 EUROfusion is operating five tokamaks under the auspices of a single Task Force called ‘Tokamak Exploitation’. The goal is to benefit from the complementary capabilities of each machi…
View article: The effect of plasma shaping on high density H-mode SOL profiles and fluctuations in TCV
The effect of plasma shaping on high density H-mode SOL profiles and fluctuations in TCV Open
The impact of plasma shaping on the properties of high density H-mode scrape-off layer (SOL) profiles and transport at the outer midplane has been investigated on Tokamakà configuration variable. The experimental dataset has been acquired …
View article: Progress in the development of the ITER baseline scenario in TCV
Progress in the development of the ITER baseline scenario in TCV Open
Under the auspices of EUROfusion, the ITER baseline (IBL) scenario has been jointly investigated on AUG and TCV in the past years and this paper reports on the developments on TCV. Three ITER shapes, namely the JET, AUG and ITER IBL have b…
View article: Effect of the isotope mass on pedestal structure, transport and stability in D, D/T and T plasmas at similar β <sub>N</sub> and gas rate in JET-ILW type I ELMy H-modes
Effect of the isotope mass on pedestal structure, transport and stability in D, D/T and T plasmas at similar β <sub>N</sub> and gas rate in JET-ILW type I ELMy H-modes Open
The work describes the pedestal structure, transport and stability in an effective mass ( A eff ) scan from pure deuterium to pure tritium plasmas using a type I ELMy H-mode dataset in which key parameters that affect the pedestal behaviou…
View article: ICRH assisted breakdown study on JET
ICRH assisted breakdown study on JET Open
Ion cyclotron (IC) wave assisted breakdown has the potential to increase the robustness of plasma initiation during the ITER pre-fusion operation phase. Studies were performed at JET at ITER relevant loop electric field, , a…
View article: Analysis and expansion of the quasi-continuous exhaust (QCE) regime in ASDEX Upgrade
Analysis and expansion of the quasi-continuous exhaust (QCE) regime in ASDEX Upgrade Open
The quasi-continuous exhaust (QCE) regime, formerly known as either type-II ELM or small ELM regime is studied in ASDEX Upgrade. The regime is a natural type-I ELM-free H-mode. The operational space of QCE discharges in ASDEX Upgrade with …
View article: Determination of MHD mode structures using soft x-ray diagnostics in TCV
Determination of MHD mode structures using soft x-ray diagnostics in TCV Open
A forward modeling technique is developed for determining the characteristic features of observed MHD modes from the line-of-sight data of the soft x-ray (SXR) diagnostics with 64 vertical lines-of-sight in theTokamak à Configuration Varia…
View article: Quasicontinuous Exhaust Scenario for a Fusion Reactor: The Renaissance of Small Edge Localized Modes
Quasicontinuous Exhaust Scenario for a Fusion Reactor: The Renaissance of Small Edge Localized Modes Open
Tokamak operational regimes with small edge localized modes (ELMs) could be a solution to the problem of large transient heat loads in fusion reactors. A ballooning mode near the last closed flux surface governed by the pressure gradient a…
View article: Improved heat and particle flux mitigation in high core confinement, baffled, alternative divertor configurations in the TCV tokamak
Improved heat and particle flux mitigation in high core confinement, baffled, alternative divertor configurations in the TCV tokamak Open
Nitrogen seeded detachment has been achieved in the tokamak a configuration variable (TCV) in alternative divertor configurations (ADCs), namely X-divertor and X -point target, with and without baffles in H-mode plasmas with high core conf…
View article: Full conversion from ohmic to runaway electron driven current via massive gas injection in the TCV tokamak
Full conversion from ohmic to runaway electron driven current via massive gas injection in the TCV tokamak Open
Full conversion from ohmic to runaway electron (RE) driven current was observed in the tokamak à configuration variable (TCV) following massive injection of neon through a disruption mitigation valve into a low-density limited circular pla…
View article: Full conversion from Ohmic to runaway electron driven current via massive gas injection in the TCV tokamak
Full conversion from Ohmic to runaway electron driven current via massive gas injection in the TCV tokamak Open
Full conversion from Ohmic to runaway electron (RE) driven current was observed in the TCV tokamak following massive injection of neon through a disruption mitigation valve into a low-density limited circular plasma. Following a partial di…
View article: Enhanced confinement in diverted negative-triangularity L-mode plasmas in TCV
Enhanced confinement in diverted negative-triangularity L-mode plasmas in TCV Open
The favorable confinement properties of negative-triangularity (NT) tokamak configurations were discovered in the TCV tokamak in the late 1990s and were documented over the two following decades, through investigations of predominantly ele…