Explanipedia

Runaway electron beam stability and decay in COMPASS Open

O. Ficker, E. Macúšová, J. Mlynář, David Břeň, A. Casolari , et al. · 2019

This paper presents two scenarios used for generation of a runaway electron (RE) beam in the COMPASS tokamak with a focus on the decay phase and control of the beam. The first scenario consists of massive gas injection of argon into the cu…

Experimental Runaway Electron Current Estimation in COMPASS Tokamak Open

M. Vlainic, O. Ficker, J. Mlynář, E. Macúšová · 2019

Runaway electrons present a potential threat to the safe operation of future nuclear fusion large facilities based on the tokamak principle (e.g., ITER). The article presents an implementation of runaway electron current estimations at COM…

Runaway electron experiments at COMPASS in support of the EUROfusion ITER physics research Open

J. Mlynář, O. Ficker, E. Macúšová, T. Markovič, D. Naydenkova , et al. · 2018

The role of the COMPASS tokamak in research of generation, confinement and losses of runaway electron (RE) population is presented. Recently, two major groups of experiments aimed at improved understanding and control of the REs have been …

Modelling Runaway Electrons Dynamics in Tokamak Plasmas: Progresses and Challenges Open

Y. Peysson, G. Anastassiou, J.F. Artaud, Ádám Budai, Alain J. Brizard , et al. · 2018

Comparison of runaway electron generation parameters in small, medium-sized and large tokamaks—A survey of experiments in COMPASS, TCV, ASDEX-Upgrade and JET Open

Victor F. Plyusnin, C. Reux, V. Kiptily, G. Pautasso, J. Decker , et al. · 2017

This paper presents a survey of the experiments on runaway electrons (RE) carried out recently in frames of EUROFusion Consortium in different tokamaks: COMPASS, ASDEX-Upgrade, TCV and JET. Massive gas injection (MGI) has been used in diff…

Losses of runaway electrons in MHD-active plasmas of the COMPASS tokamak Open

O. Ficker, J. Mlynář, M. Vlainic, J. Čeřovský, J. Urbán , et al. · 2017

The significant role of magnetic perturbations in mitigation and losses of runaway electrons (REs) was documented in dedicated experimental studies of RE at the COMPASS tokamak. REs in COMPASS are produced both in low density quiescent dis…

M. Vlainic - Studies of Runway Electrons in COMPASS Open

M. Vlainic · 2017

RE beam generation in MGI disruptions on COMPASS Open

O. Ficker, J. Mlynář, E. Macúšová, M. Vlainic, V. Weinzettl , et al. · 2017

In the experiments with the massive gas injection (MGI) triggered disruptions in the COMPASS tokamak, post-disruptive runaway electron (RE) beams are generated occasionally. In this contribution, a relatively large set of discharges from t…

Studies of Runaway Electrons in COMPASS Tokamak Open

M. Vlainic · 2017

Post-disruptive runaway electron beams in the COMPASS tokamak Open

M. Vlainic, J. Mlynář, J. Cavalier, V. Weinzettl, R. Papřok , et al. · 2015

For ITER-relevant runaway electron studies, such as suppression, mitigation, termination and/or control of a runaway beam, it is important to obtain the runaway electrons after the disruption. In this paper we report on the first discharge…

Kinetic modelling of runaway electron avalanches in tokamak plasmas Open

Emelie Nilsson, J. Decker, Y. Peysson, R. Granetz, F. Saint-Laurent , et al. · 2015

Runaway electrons can be generated in tokamak plasmas if the accelerating force from the toroidal electric field exceeds the collisional drag force owing to Coulomb collisions with the background plasma. In ITER, disruptions are expected t…

First dedicated observations of runaway electrons in the COMPASS tokamak Open

M. Vlainic, J. Mlynář, V. Weinzettl, R. Papřok, M. Imríšek , et al. · 2015

Runaway electrons present an important part of the present efforts in nuclear fusion research with respect to the potential damage of the in-vessel components. The COMPASS tokamak a suitable tool for the studies of runaway electrons, due t…

Kinetic modelling of runaway electron avalanches in tokamak plasmas Open

Emelie Nilsson, J. Decker, Y. Peysson, R. Granetz, F. Saint-Laurent , et al. · 2015

Runaway electrons (REs) can be generated in tokamak plasmas if the accelerating force from the toroidal electric field exceeds the collisional drag force due to Coulomb collisions with the background plasma. In ITER, disruptions are expect…

Post-Disruptive Runaway Electron Beam in COMPASS Tokamak Open

M. Vlainic, J. Mlynář, J. Cavalier, V. Weinzettl, R. Papřok , et al. · 2015

For ITER-relevant runaway electron studies, such as suppression, mitigation, termination and/or control of runaway beam, obtaining the runaway electrons after the disruption is important. In this paper we report on the first achieved disch…

Effects of plasma control on runaway electrons in the COMPASS Tokamak Open

J. Mlynář, O. Ficker, M. Vlainic, V. Weinzettl, M. Imríšek , et al. · 2015

Synchrotron Radiation from Runaway Electrons in COMPASS Tokamak Open

M. Vlainic, P. Vondráček, J. Mlynář, V. Weinzettl, O. Ficker , et al. · 2015

5. CONCLUSION A method of extracting the relevant information from the reflected SR using an appropriate analysis is presented. From here the threshold of the average critical energy W c =40 keV during the discharge can be estimated. The f…

CsI(Tl) semiconductor detectors for hard X-ray diagnostics at COMPASS Tokamak Open

R. Papřok, M. Vlainic, J. Mlynář, V. Weinzettl, Mykyta Varavin , et al. · 2015

Measurements of the hard X-ray (HXR) radiation provide rich data for runaway electron studies. Most of the data corresponds to radiation from the plasma facing components (solid first-wall) due to impact of the runaway electrons escaping t…

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