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Artur Perek

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Publications associées (43)

Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV (vol 63, 026006, 2023)

Basil Duval, Christian Gabriel Theiler, Cristian Galperti, Artur Perek

In the published paper titled 'Model-based impurity emission front control using deuterium fueling and nitrogen seeding in TCV' (2023 Nucl. Fusion 63 026006), the legend of figure 5 shows the wrong colors: red and blue are switched. This corrigendum provid ...

IOP Publishing Ltd2023

A spectroscopic inference and SOLPS-ITER comparison of flux-resolved edge plasma parameters in detachment experiments on TCV

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

This work presents the use of a collisional-radiative model to infer plasma parameters from 2D emissivities of several deuterium Balmer lines. The emissivities were obtained by MANTIS, an absolutely calibrated, ten-camera imaging polychromator with

IOP Publishing Ltd2022

Improved heat and particle flux mitigation in high core confinement, baffled, alternative divertor configurations in the TCV tokamak

Patrick Blanchard, Basil Duval, Holger Reimerdes, Benoît Labit, Christian Gabriel Theiler, Hugo De Oliveira, Umar Sheikh, Filippo Bagnato, Matteo Vallar, Sophie Danielle Angelica Gorno, Claudia Colandrea, Harshita Raj, Artur Perek

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 confinement. Both ADCs ...

IOP Publishing Ltd2022

New insights on divertor parallel flows,E x B drifts, and fluctuations from in situ, two-dimensional probe measurement in the Tokamak a Configuration Variable

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Hugo De Oliveira, Cedric Kar-Wai Tsui, Sophie Danielle Angelica Gorno, Artur Perek

In situ, two-dimensional (2D) Langmuir probe measurements across a large part of the TCV outer divertor are reported in L-mode discharges with and without divertor baffles. This provides detailed insights into time averaged profiles, particle fluxes, and f ...

IOP Publishing Ltd2022

Evidence on the effects of main-chamber neutrals on density shoulder broadening

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Cedric Kar-Wai Tsui, Umar Sheikh, Marcelo Baquero Ruiz, Nicola Vianello, Mirko Wensing, Sophie Danielle Angelica Gorno, Artur Perek

Evidence that density shoulder broadening is dependent on high main-chamber neutral density is presented. Shoulder broadening does notoccur when the sources for main-chamber neutrals are minimized using divertor baffles and wide gaps to the first wall (sim ...

2022

Systematic extraction of a control-oriented model from perturbative experiments and SOLPS-ITER for emission front control in TCV

Mirko Wensing, Olivier Claude Martin Février, Artur Perek

Systematic extraction of locally valid dynamic models from experiments is necessary for controller design and the validation of high fidelity models. This paper describes the extraction of a dynamic model in the form of a transfer function, giving the dyna ...

IOP Publishing Ltd2022

A study of the influence of plasma-molecule interactions on particle balance during detachment

Basil Duval, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

In this work we provide experimental insights into the impact of plasma-molecule interactions on the target ion flux decrease during divertor detachment achieved through a core density ramp in the TCV tokamak. Our improved analysis of the hydrogen Balmer s ...

Elsevier2021

A novel hydrogenic spectroscopic technique for inferring the role of plasma-molecule interaction on power and particle balance during detached conditions

Basil Duval, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

Detachment, an important mechanism for reducing target heat deposition, is achieved through reductions in power, particle and momentum; which are induced through plasma-atom and plasma-molecule interactions. Experimental research in how those reactions pre ...

IOP PUBLISHING LTD2021

Development of an 11-channel multi wavelength imaging diagnostic for divertor plasmas in MAST Upgrade

Basil Duval, Yanis Andrebe, Wouter Vijvers, Artur Perek

Divertor detachment and alternative divertor magnetic geometries are predicted to be promising approaches to handle the power exhaust of future fusion devices. In order to understand the detachment process caused by volumetric losses in alternative diverto ...

2021

Real-time feedback control of the impurity emission front in tokamak divertor plasmas

Basil Duval, Christian Gabriel Theiler, Federico Alberto Alfredo Felici, Cristian Galperti, Artur Perek

In magnetic confinement thermonuclear fusion the exhaust of heat and particles from the core remains a major challenge. Heat and particles leaving the core are transported via open magnetic field lines to a region of the reactor wall, called the divertor. ...

Nature Research2021

Tomographic reconstruction of the runaway distribution function in TCV using multispectral synchrotron images

Basil Duval, Joan Decker, Umar Sheikh, Gergely Papp, Artur Perek

Synchrotron radiation observed in a quiescent Tokamak a Configuration Variable (TCV) runaway discharge is studied using filtered camera images targeting three distinct wavelength intervals. Through the tomographic simultaneous algebraic reconstruction tech ...

IOP Publishing Ltd2021

Measurement of the 2D emission profiles of hydrogen and impurity ions in the TCV divertor

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

Plasma emission of hydrogen and impurities is measured with use of filtered camera imaging in TCV divertor. The measurement technique is discussed in detail including: selection choice of filters, the absolute calibration procedure and the tomographic inve ...

Elsevier2021

Initial TCV operation with a baffled divertor

Patrick Blanchard, Basil Duval, Ambrogio Fasoli, Jean-Marc Moret, Holger Reimerdes, Duccio Testa, Christian Gabriel Theiler, Matthieu Toussaint, Hugo De Oliveira, Cedric Kar-Wai Tsui, Umar Sheikh, Marcelo Baquero Ruiz, Roberto Maurizio, Mirko Wensing, Filippo Bagnato, Davide Galassi, Lorenzo Martinelli, Sophie Danielle Angelica Gorno, Claudia Colandrea, Harshita Raj, Artur Perek

The Tokamak à Configuration Variable (TCV) tokamak is in the midst of an upgrade to further its capability to investigate conventional and alternative divertor configurations. To that end, modular and removable gas baffles have been installed to decrease t ...

IOP Publishing Ltd2021

SOLPS-ITER validation with TCV L-mode discharges

Patrick Blanchard, Basil Duval, Holger Reimerdes, Marco Wischmeier, Christian Gabriel Theiler, Hugo De Oliveira, Cedric Kar-Wai Tsui, Kevin Henricus Annemarie Verhaegh, Marcelo Baquero Ruiz, Mirko Wensing, Filippo Bagnato, Lorenzo Martinelli, Sophie Danielle Angelica Gorno, Claudia Colandrea, Artur Perek

This work presents a quantitative test of SOLPS-ITER simulations against tokamak a configuration variable (TCV) L-mode experiments. These simulations account for drifts, currents, kinetic neutrals, and carbon impurities providing the most complete edge tra ...

2021

The role of plasma-molecule interactions on power and particle balance during detachment on the TCV tokamak

Basil Duval, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Artur Perek

This paper shows experimental results from the TCV tokamak that indicate plasma-molecule interactions involving D2+

IOP Publishing Ltd2021

Runaway electron synchrotron radiation in a vertically translated plasma

Basil Duval, Joan Decker, Umar Sheikh, Gergely Papp, Artur Perek

Synchrotron radiation observed from runaway electrons (REs) in tokamaks depends upon the position and size of the RE beam, the RE energy and pitch distributions, as well as the location of the observer. We show experimental synchrotron images of a vertical ...

IOP Publishing Ltd2020

Development of a real-time algorithm for detection of the divertor detachment radiation front using multi-spectral imaging

Christian Gabriel Theiler, Wouter Vijvers, Kevin Henricus Annemarie Verhaegh, Artur Perek

In this paper we present a novel algorithm to extract the optical plasma boundary and radiation front for detached divertor plasmas. We show that reliable detection of the divertor leg and radiation front is possible using lightweight image processing tool ...

IOP Publishing Ltd2020

MANTIS: A real-time quantitative multispectral imaging system for fusion plasmas

Basil Duval, Yanis Andrebe, Wouter Vijvers, Cristian Galperti, Kevin Henricus Annemarie Verhaegh, Artur Perek

This work presents a novel, real-time capable, 10-channel Multispectral Advanced Narrowband Tokamak Imaging System installed on the TCV tokamak, MANTIS. Software and hardware requirements are presented together with the complete system architecture. The im ...

AMER INST PHYSICS2019

SOLPS-ITER simulations of the TCV divertor upgrade

Basil Duval, Holger Reimerdes, Marco Wischmeier, Christian Gabriel Theiler, Kevin Henricus Annemarie Verhaegh, Mirko Wensing, Davide Galassi, Artur Perek

The effect of the upcoming TCV divertor upgrade on the distribution of neutrals and the onset of detachment is studied using 2D transport code simulations. The divertor upgrade is centered around the installation of a gas baffle to form a divertor chamber ...

2019

Progress toward divertor detachment on TCV within H-mode operating parameters

Basil Duval, Holger Reimerdes, Alexander Karpushov, Benoît Labit, Christian Gabriel Theiler, Wouter Vijvers, Antoine Pierre Emmanuel Alexis Merle, Curdin Tobias Wüthrich, Cedric Kar-Wai Tsui, Umar Sheikh, Kevin Henricus Annemarie Verhaegh, Roberto Maurizio, Artur Perek

Recent experiments on Tokamak à Configuration Variable have made significant progress toward partial detachment of the outer divertor in neutral beam heated H-mode plasmas in conventional and alternative divertor configurations. The heating power required ...

2019

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