J. Decker
YOU?
Author Swipe
View article: First velocity-space resolved measurements of relativistic electron losses in a magnetically confined plasma
First velocity-space resolved measurements of relativistic electron losses in a magnetically confined plasma Open
This letter reports on the first direct velocity-space resolved measurements of runaway electrons (REs) losses in magnetically confined plasmas using a unique Fast Particle Loss Detector (FPLD) installed on the magnetic confinement fusion …
View article: An upper pressure limit for low-<i>Z</i> benign termination of runaway electron beams in TCV
An upper pressure limit for low-<i>Z</i> benign termination of runaway electron beams in TCV Open
We present a model for the particle balance in the post-disruption runaway electron plateau phase of a tokamak discharge. The model is constructed with the help of, and applied to, experimental data from TCV discharges investigating the so…
View article: An upper pressure limit for low-Z benign termination of runaway electron beams in TCV
An upper pressure limit for low-Z benign termination of runaway electron beams in TCV Open
We present a model for the particle balance in the post-disruption runaway electron plateau phase of a tokamak discharge. The model is constructed with the help of, and applied to, experimental data from TCV discharges investigating the so…
View article: Experimental research on the TCV tokamak
Experimental research on the TCV tokamak Open
Tokamak à configuration variable (TCV), recently celebrating 30 years of near-continual operation, continues in its missions to advance outstanding key physics and operational scenario issues for ITER and the design of future power plants …
View article: Cross-calibration and first vertical ECE measurement of electron energy distribution in the TCV tokamak
Cross-calibration and first vertical ECE measurement of electron energy distribution in the TCV tokamak Open
This paper describes the first vertical electron cyclotron emission measurement of non-thermal electron distributions in the Tokamak à Configuration Variable . These measurements were conducted in runaway electron scenarios and in the pres…
View article: Overview of the TCV digital real-time plasma control system and its applications
Overview of the TCV digital real-time plasma control system and its applications Open
Real-time plasma control systems are at the heart of operation of modern tokamaks. The control system of the TCV tokamak has recently seen a major upgrade in terms of its hardware and software components. Control algorithms are entirely pr…
View article: Dynamics of JET runaway electron beams in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mrow> <mml:msub> <mml:mi>D</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:mrow> </mml:mrow> </mml:math> -rich shattered pellet injection mitigation experiments
Dynamics of JET runaway electron beams in -rich shattered pellet injection mitigation experiments Open
The publication provide further insights into the dynamics of JET runaway electron (RE) beams mitigated by D2-rich shattered pellet injection (SPI) (Reux et al 2022 Plasma Phys. Control. Fusion 64 034002). Multi-diagnostic analyses show th…
View article: Expulsion of runaway electrons using ECRH in the TCV tokamak
Expulsion of runaway electrons using ECRH in the TCV tokamak Open
Runaway electrons (REs) are a concern for tokamak fusion reactors from discharge startup to termination. A sudden localized loss of a multi-megaampere RE beam can inflict severe damage to the first wall. Should a disruption occur, the exis…
View article: Cross-Calibration and First Vertical ECE Measurement of Electron Energy Distribution in the TCV Tokamak
Cross-Calibration and First Vertical ECE Measurement of Electron Energy Distribution in the TCV Tokamak Open
This paper describes the first Vertical Electron Cyclotron Emission (V-ECE) measurement of non-thermal electron distributions in the \textit{Tokamak à Configuration Variable}, TCV. These measurements were conducted in runaway electron scen…
View article: Expulsion of runaway electrons using ECRH in the TCV tokamak
Expulsion of runaway electrons using ECRH in the TCV tokamak Open
Runaway electrons (REs) are a concern for tokamak fusion reactors from discharge startup to termination. A sudden localized loss of a multi-megaampere RE beam can inflict severe damage to the first wall. Should a disruption occur, the exis…
View article: Evaluation of ECG-Gated, High-Pitch Thoracoabdominal Angiographies With Dual-Source Photon-Counting Detector Computed Tomography
Evaluation of ECG-Gated, High-Pitch Thoracoabdominal Angiographies With Dual-Source Photon-Counting Detector Computed Tomography Open
Purpose: The aim of this study was to evaluate the radiation dose, image quality, and the potential of virtual monoenergetic imaging (VMI) reconstructions of high-pitch computed tomography angiography (CTA) of the thoracoabdominal aorta on…
View article: Benign termination of runaway electron beams on ASDEX Upgrade and TCV
Benign termination of runaway electron beams on ASDEX Upgrade and TCV Open
This paper discusses the development of a benign termination scenario for runaway electron (RE) beams on ASDEX Upgrade and TCV. A systematic study revealed that a low electron density ( n e ) companion plasma was required to achieve a larg…
View article: Impact of microwave beam scattering by density fluctuations on the electron–cyclotron power deposition profile in tokamaks
Impact of microwave beam scattering by density fluctuations on the electron–cyclotron power deposition profile in tokamaks Open
Electron–cyclotron waves are a tool commonly used in tokamaks, in particular to drive current. Their ability to drive current in a very localized manner renders them an optimal tool for MHD mode mitigation. However, such applications requi…
View article: Resonant interaction between runaway electrons and the toroidal magnetic field ripple in TCV
Resonant interaction between runaway electrons and the toroidal magnetic field ripple in TCV Open
This work explains the anomalously high runaway electron (RE) pitch angles inferred in the flat-top of dedicated Tokamak à Configuration Variable (TCV) experiments. Kinetic modelling shows that the resonant interaction between the gyromoti…
View article: A unified description of atomic physics for electron Fokker–Planck calculations
A unified description of atomic physics for electron Fokker–Planck calculations Open
Most realistic kinetic calculations for tokamak plasmas are now required to incorporate the effect of partially ionized high-Z elements arising either from uncontrolled influxes of metallic impurities, such as tungsten in high input power …
View article: Experimental and numerical investigations of electron transport enhancement by electron-cyclotron plasma-wave interaction in tokamaks
Experimental and numerical investigations of electron transport enhancement by electron-cyclotron plasma-wave interaction in tokamaks Open
Energy transfer from electron-cyclotron (EC) waves to the plasma is being routinely used in tokamaks to heat and drive current through the electron channel. Technical applications such as magnetohydrodynamic mode mitigation require power d…
View article: Optimization of X-mode electron cyclotron current drive in high-electron-temperature plasma in the EAST tokamak
Optimization of X-mode electron cyclotron current drive in high-electron-temperature plasma in the EAST tokamak Open
A discharge with electron temperature up to 14 keV has been achieved in EAST. Analysis of the electron cyclotron current drive (ECCD) efficiency at high electron temperature under EAST parameters is presented using C3PO/LUKE code. Simulati…
View article: A FAIR based approach to data sharing in Europe
A FAIR based approach to data sharing in Europe Open
The European fusion research activities have, over recent decades, generated a vast and varied set of data. The volume and diversity of the data that need to be catalogued and annotated make the task of organising and making the data avail…
View article: Electron-cyclotron resonance heating and current drive source for flux-driven gyrokinetic simulations of tokamaks
Electron-cyclotron resonance heating and current drive source for flux-driven gyrokinetic simulations of tokamaks Open
Electromagnetic waves that resonate with the cyclotron motion of electrons in a magnetized plasma can efficiently transfer their momentum and energy to the plasma. This is routinely used to heat or drive current in tokamak plasmas. The imp…
View article: Blueprint architecture for a Fusion Open Data Framework
Blueprint architecture for a Fusion Open Data Framework Open
The overall objective of the Fair4Fusion project is to demonstrate the impact of making data from fusion devices more easily findable and accessible. The main focus towards achieving this goal is to improve FAIRness of the fusion data to m…
View article: Overview of the TCV tokamak experimental programme
Overview of the TCV tokamak experimental programme Open
The tokamak à configuration variable (TCV) continues to leverage its unique shaping capabilities, flexible heating systems and modern control system to address critical issues in preparation for ITER and a fusion power plant. For the 2019–…
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: Results on quiescent and post-disruption runaway electrons studies at Frascati Tokamak Upgrade: RE mitigation via solid deuterium pellets and anomalous Doppler instability
Results on quiescent and post-disruption runaway electrons studies at Frascati Tokamak Upgrade: RE mitigation via solid deuterium pellets and anomalous Doppler instability Open
Results from the last FTU campaigns on RE mitigation strategies for quiescent and post-disruption RE beams are presented. We provide experimental evidence that for some RE quiescent scenarios D2 solid pellets achieve complete RE suppressio…
View article: Latest results on quiescent and post-disruption runaway electron mitigation experiments at Frascati Tokamak Upgrade
Latest results on quiescent and post-disruption runaway electron mitigation experiments at Frascati Tokamak Upgrade Open
Results from the last FTU campaigns on the deuterium large (wrt FTU volume) pellet REs suppression capability, mainly due to the induced burst MHD activity expelling REs seed are presented for discharges with 0.5 MA and 5.3T. Clear indicat…
View article: Quasilinear treatment of wave–particle interactions in the electron cyclotron range and its implementation in a gyrokinetic code
Quasilinear treatment of wave–particle interactions in the electron cyclotron range and its implementation in a gyrokinetic code Open
A quasilinear operator for wave–particle interactions in the electron cyclotron range is derived using the cold plasma dispersion relation. The finite width of the beam implies a broadening of the resonance layer in the velocity space whic…
View article: Study of suprathermal electron dynamics during electron cyclotron current drive using hard x-ray measurements in the TCV tokamak
Study of suprathermal electron dynamics during electron cyclotron current drive using hard x-ray measurements in the TCV tokamak Open
Suprathermal electron dynamics in real and momentum spaces plays an important role in the physics of electron cyclotron current drive (ECCD), in particular for predicting the wave driven current. In the TCV tokamak, a hard x-ray spectrosco…