2nd Technical Meeting on the Collisional-Radiative Properties of Tungsten and Hydrogen in Edge Plasma of Fusion Devices

The 2nd Technical Meeting on the Collisional-Radiative Properties of Tungsten and Hydrogen in Edge Plasma of Fusion Devices, was held from 28 November – 1 December 2023 in Room CR2 at IAEA Headquarters in Vienna, Austria. The Scientific Secretary is Kalle HEINOLA.

For registration and abstract submission, please see the Indico meeting page.

The IAEA is committed to the promotion of gender equality in all its activities and qualified women scientists are particularly encouraged to participate in the meeting.

Introduction

Tungsten is currently the most prominent candidate to be used as an armour material in the first wall components of future fusion power plants. It has excellent physical and thermomechanical properties to withstand the extreme conditions necessary for fusion, including high heat gradients and particle fluxes from the reactor’s hydrogen plasma fuel. However, even small amounts of ejected tungsten material off the components’ surfaces can be detrimental to the hydrogen plasma operation. In order to perform predictive simulations of plasma performance incorporating tungsten impurities and to characterise the tungsten source originating from the wall components, validated and evaluated atomic and molecular data must be used as input in the simulations.

This Technical Meeting on Tungsten and Hydrogen in Edge Plasmas brings together physicists from a broad range of fusion research domains to discuss and share information on the current understanding of physics and data requirements for tungsten and hydrogen plasma interactions. The goal is to provide a forum for information exchange between i) fusion experimentalists utilizing linear plasma and magnetic fusion devices as well as researchers performing fundamental laboratory experiments, and ii) physicists performing edge plasma simulations as well as theorists providing fundamental atomic, molecular and plasma-wall interaction data for fusion. Participants are invited to propose a presentation of their research, either as an oral contribution or as a poster.

Objectives

  • Knowledge-sharing and networking between fusion researchers and plasma scientists in different domains to identify commonalities, foster collaboration and share opportunities.
  • Training and instruction of early-stage career researchers in experimental and theoretical tools used in research of plasma-particle processes taking place in edge plasma regions of a fusion reactor.
  • Discussion and review of emerging research areas in fusion physics and science specifically related to atomic and molecular edge plasma processes and plasma-wall processes incorporating tungsten and hydrogen.
  • Proceedings of the meeting to be made available in a suitable journal publication.

Target Audience

Research scientists related to nuclear fusion, at any stage of their career, who are involved in the quantitative and qualitative study, analysis, modelling or prediction of collisional-radiative properties or plasma-wall interactions of tungsten and hydrogen in fusion devices, using or producing fundamental data on these processes. Experimental and theoretical approaches are welcomed.

The IAEA is committed to the promotion of gender equality in all its activities and qualified women scientists are particularly encouraged to participate in the meeting.

Topics

  • Missing tungsten and hydrogen data in magnetically-confined edge plasma models
    • Rates for ionization, recombination and excitation
    • Multi-step ionization and excitation
    • Non-resonant charge exchange
  • Recommended tungsten and hydrogen data for edge plasma modelling
    • Addressing the large scatter in the various sets for W atomic data (in particular excitation rates)
    • Hydrogen molecular data: vibrationally-, rotationally- and isotopically-resolved data; mixed molecules; limited data available for T2, TH and TD
    • Metastable states of W
    • Uncertainties of W and hydrogen data
  • The inclusion of reduced photon opacity information in collisional-radiative models
    • Revised CRM with (semi)opaque lines
    • Full non-linear model or a reduced CRM
    • Isotope effects of collisional broadening in high plasma density
    • Wall reflection models for photons: on W and Be or deposited layers; surface roughness effects
  • Data needs for ITER: CR and plasma-wall interactions with W and hydrogen
    • Accuracy improvement for ionization, recombination, radiation and CX rates of W
    • CR: to obtain reliable charge distribution of W for modelling W upstream migration and penetration to core plasma
    • Spectral lines of interest W0 to at least W64+
    • Dielectronic recombination rates and photon opacity for W vapour shielding during fast transients

Of particular relevance to this meeting is this memo from ITER enumerating the open issues in the new baseline with a tungsten wall for Q=10 operation that require experimental assessment.

Agenda

Tuesday, 28 November 2023

10:00 – 10:30Arjan KONING (SH-NDS), Christian HILL, Kalle HEINOLA: Meeting opening, welcome, introductions
10:30 – 11:00Zhifeng CHENG (ITER, France)
ITER Spectroscopic Diagnostics and Atomic Data Needs
[abstract (pdf)] [presentation (pdf: 2.5 MB)]
11:00 – 11:30Rui DING (Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), China)
Charge-exchange deuterium flux to the main chamber wall and its induced material erosion in EAST
[abstract (pdf)]
11:30 – 11:45Coffee Break
11:45 – 12:15Dirk WÜNDERLICH (Max Planck Institute for Plasma Physics, Garching, Germany)
Vibrationally and ro-vibrationally resolved collisional radiative modelling of molecular hydrogen: current status and outlook
[abstract (pdf)] [presentation (pdf: 1.2 MB)]
12:15 – 12:45MURAKAMI Izumi (National Institute for Fusion Science, Japan)
Extreme ultraviolet spectra and collisional-radiative model for mid-charged tungsten ions
[abstract (pdf)]
12:45 – 13:15All: discussion
13:15 – 14:30Lunch
14:30 – 15:00Sebastiján BREZINSEK (Forschungszentrum Jülich (FZJ), Germany)
Studies of H2 molecules in the plasma boundary of Wendelstein 7-X
15:00 – 15:30Ewa PAWELEC (University of Opole, Poland)
Challenges in the analysis of the spectra of tritium-containing molecules
[abstract (pdf)] [presentation (pdf: 1.8 MB)]
15:30 – 15:45Coffee Break
15:45 – 16:15Sven WIESEN (Forschungszentrum Jülich (FZJ), Germany)
Detailed charge exchange neutral distribution modelling for the ITER main wall
[presentation (pdf: 1.9 MB)]
16:15 – 16:45Mathias GROTH (Aalto University, Finland)
Impact of H, D, T and D-T Hydrogenic Isotopes on Detachment in JET ITER-like Wall Low-Confinement Mode Plasmas
[abstract (pdf)] [presentation (pdf: 7.5 MB)] online
16:45 – 17:45All: discussion

Wednesday, 29 November 2023

09:00 – 09:30FUJII Keisuke (Oak Ridge National Laboratory, United States of America)
Validating Collision-Radiation-Predissociation Dataset for Molecular Hydrogen with Visible Emission Spectra
[abstract (pdf)]
09:30 – 10:00Kevin VERHAEGH (United Kingdom Atomic Energy Authority, United Kingdom)
The importance of plasma-chemistry in detached plasmas and the need for updated rates through CRM
[abstract (pdf)] [presentation (pdf: 5.2 MB)]
10:00 – 10:15Coffee Break
10:15 – 10:45Christian CUPAK (TU Wien, Austria)
Effects of surface roughness on W sputtering
[abstract (pdf)]
10:45 – 11:15Fredric GRANBERG (Department of Physics, University of Helsinki, Finland)
Computational study of tungsten surface sputtering under various conditions
[abstract (pdf)]
11:15 – 11:45All: discussion
11:45 – 13:00Lunch
13:00 – 13:30Martin O'MULLANE (Department of Physics, University of Strathclyde, United Kingdom)
Update on atomic data and population models for hydrogen and tungsten
[abstract (pdf)] [presentation (pdf: 3.1 MB)]
13:30 – 14:00Vincenzo LAPORTA (CNR Bari, Italy)
Update on electron-H2 and -D2 cross sections [WITHDRAWN]
14:00 – 14:15Coffee Break
14:15 – 14:45Ling ZHANG (Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), China)
Tungsten density and influx evaluations based on the latest atomic data in EAST tokamak plasma
[abstract (pdf)] [presentation (pdf: 6.6 MB)]
14:45 – 15:15Wilasinee KINGKAM (Thailand Institute of Nuclear Technology, Thailand)
Overview of Thailand's Tokamak 1 Experimental Studies
[abstract (pdf)] [presentation (pdf: 5.7 MB)]
15:15 – 16:15All: discussion

Thursday, 30 November 2023

09:00 – 09:30David TSKHAKAYA (Institute of Plasma Physics of the Czech Academy of Sciences, Czechia)
Atomic data needs for studying of W sputtering in high density divertor plasmas
[abstract (pdf)] [presentation (pdf: 1.9 MB)]
09:30 – 10:00Liam SCARLETT (Faculty of Science and Engineering, Curtin University, Australia)
Electron collisions with molecular hydrogen and its isotopologues
[abstract (pdf)]
10:00 – 10:30Kerry LAWSON (United Kingdom Atomic Energy Authority, United Kingdom)
Inclusion of opacity in collisional-radiative models of hydrogen-like He and D to explain discrepancies with line intensity measurements in the JET tokamak
[abstract (pdf)] [presentation (pdf: 8.8 MB)]
10:30 – 10:45Coffee Break
10:45 – 11:15Stephan ERTMER (Forschungszentrum Jülich (FZJ), Germany)
Energy, angular and atomic level distribution functions of sputtered tungsten based on spectroscopic investigations
[abstract (pdf)]
11:15 – 11:45Bowen LI (Lanzhou School of Nuclear Science and Technology, China)
Contributions of metastable states and non-Maxwellian EEDF to electron-impact ionization of tungsten ions
[abstract (pdf)] [presentation (pdf: 2.9 MB)]
11:45 – 12:15All: discussion
12:15 – 13:30Lunch
13:30 – 14:00Udo VON TOUSSAINT (Max Planck Institute for Plasma Physics, Garching, Germany)
Modelling of Reflection and Sputtering properties from structured and crystalline surfaces: Old and new insights
14:00 – 14:30Christian BAUMANN (Forschungszentrum Jülich (FZJ), Germany)
Global tungsten erosion and impurity migration modeling for the DEMO with the ERO2.0 code
[presentation (pdf: 1.7 MB)]
14:30 – 14:45Coffee Break
14:45 – 15:45All: discussion on fusion devices
15:45 – 16:45All: discussion
19:00 – 21:00Social Dinner: Restaurant Beim Hofmeister, Bräunerstraße 7, 1010 Wien.

Friday, 1 December 2023

09:00 – 09:15Zhifeng CHENG (ITER, France)
Open issues in the new ITER baseline
[abstract (pdf)] [presentation (pdf: 2.5 MB)]
09:15 – 09:45Christian HILL (IAEA)
CollisionDB - an open IAEA database for collision processes in fusion plasmas
09:45 – 10:05Coffee Break
10:05 – 10:35Sebastiján BREZINSEK (Forschungszentrum Jülich (FZJ), Germany)
Fusion devices: summary (experimental activities)
10:35 – 11:05Martin O'MULLANE (Department of Physics, University of Strathclyde, United Kingdom)
Atomic and molecular data: summary (modelling activities)
11:05 – 11:35Dirk WÜNDERLICH (Max Planck Institute for Plasma Physics, Garching, Germany)
Collisional-radiative modelling: summary
11:35 – 12:05Sven WIESEN (Forschungszentrum Jülich (FZJ), Germany)
Fusion devices: summary (modelling activities)
[presentation (pdf: 1.9 MB)]
12:05 – 12:35Sebastiján BREZINSEK (Forschungszentrum Jülich (FZJ), Germany)
Atomic and molecular data: summary (experimental activities)
12:35 – 13:35All: discussion

Participants

36 participants from 17 countries.

NameInstitution
Christian BAUMANN Forschungszentrum Jülich (FZJ), Germany
Sebastiján BREZINSEK Forschungszentrum Jülich (FZJ), Germany
Zhifeng CHENG ITER, France
Christian CUPAK TU Wien, Austria
Rui DING Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), China
Stephan ERTMER Forschungszentrum Jülich (FZJ), Germany
FUJII Keisuke Oak Ridge National Laboratory, United States of America
Fredric GRANBERG Department of Physics, University of Helsinki, Finland
Mathias GROTH Aalto University, Finland
Christian HILL IAEA
Haikel JELASSI National Center of Nuclear Sciences and Technologies (CNSTN), Tunisia
Wilasinee KINGKAM Thailand Institute of Nuclear Technology, Thailand
Vincenzo LAPORTA CNR Bari, Italy
Ahmed LASHIN Egyptian Atomic Energy Authority, Egypt
Kerry LAWSON United Kingdom Atomic Energy Authority, United Kingdom
Bowen LI Lanzhou School of Nuclear Science and Technology, China
MURAKAMI Izumi National Institute for Fusion Science, Japan
Martin O'MULLANE Department of Physics, University of Strathclyde, United Kingdom
Ewa PAWELEC University of Opole, Poland
Liam SCARLETT Faculty of Science and Engineering, Curtin University, Australia
Faridodin SEDIGHI Nuclear Science and Technology Research Institute, Iran
David TSKHAKAYA Institute of Plasma Physics of the Czech Academy of Sciences, Czechia
Kevin VERHAEGH United Kingdom Atomic Energy Authority, United Kingdom
Udo VON TOUSSAINT Max Planck Institute for Plasma Physics, Garching, Germany
Sven WIESEN Forschungszentrum Jülich (FZJ), Germany
Dirk WÜNDERLICH Max Planck Institute for Plasma Physics, Garching, Germany
Ling ZHANG Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), China
Dmitriy BORODIN Forschungszentrum Jülich (FZJ), Germany
Kalle HEINOLA IAEA
DIPTI IAEA
Igor BRAY Faculty of Science and Engineering, Curtin University, Australia
Alisher KADYROV Faculty of Science and Engineering, Curtin University, Australia
Arjan J. KONING IAEA
Birger BUTTENSCHÖN Max Planck Institute for Plasma Physics (IPP), Greifswald, Germany
Duc Ba NGUYEN Duy Tân University, Vietnam
Peter YARON Flinders University, Australia

Presentations

There are 30 presentations at this event.

Christian BAUMANN (Forschungszentrum Jülich (FZJ), Germany)
Global tungsten erosion and impurity migration modeling for the DEMO with the ERO2.0 code
[presentation (pdf: 1.7 MB)]

Sebastiján BREZINSEK (Forschungszentrum Jülich (FZJ), Germany)
Studies of H2 molecules in the plasma boundary of Wendelstein 7-X

Sebastiján BREZINSEK (Forschungszentrum Jülich (FZJ), Germany)
Fusion devices: summary (experimental activities)

Sebastiján BREZINSEK (Forschungszentrum Jülich (FZJ), Germany)
Atomic and molecular data: summary (experimental activities)

Zhifeng CHENG (ITER, France)
ITER Spectroscopic Diagnostics and Atomic Data Needs
[abstract (pdf)] [presentation (pdf: 2.5 MB)]

Zhifeng CHENG (ITER, France)
Open issues in the new ITER baseline
[abstract (pdf)] [presentation (pdf: 2.5 MB)]

Christian CUPAK (TU Wien, Austria)
Effects of surface roughness on W sputtering
[abstract (pdf)]

Rui DING (Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), China)
Charge-exchange deuterium flux to the main chamber wall and its induced material erosion in EAST
[abstract (pdf)]

Stephan ERTMER (Forschungszentrum Jülich (FZJ), Germany)
Energy, angular and atomic level distribution functions of sputtered tungsten based on spectroscopic investigations
[abstract (pdf)]

FUJII Keisuke (Oak Ridge National Laboratory, United States of America)
Validating Collision-Radiation-Predissociation Dataset for Molecular Hydrogen with Visible Emission Spectra
[abstract (pdf)]

Fredric GRANBERG (Department of Physics, University of Helsinki, Finland)
Computational study of tungsten surface sputtering under various conditions
[abstract (pdf)]

Mathias GROTH (Aalto University, Finland)
Impact of H, D, T and D-T Hydrogenic Isotopes on Detachment in JET ITER-like Wall Low-Confinement Mode Plasmas
[abstract (pdf)] [presentation (pdf: 7.5 MB)]

Christian HILL (IAEA)
CollisionDB - an open IAEA database for collision processes in fusion plasmas

Wilasinee KINGKAM (Thailand Institute of Nuclear Technology, Thailand)
Overview of Thailand's Tokamak 1 Experimental Studies
[abstract (pdf)] [presentation (pdf: 5.7 MB)]

Vincenzo LAPORTA (CNR Bari, Italy)
Update on electron-H2 and -D2 cross sections

Kerry LAWSON (United Kingdom Atomic Energy Authority, United Kingdom)
Inclusion of opacity in collisional-radiative models of hydrogen-like He and D to explain discrepancies with line intensity measurements in the JET tokamak
[abstract (pdf)] [presentation (pdf: 8.8 MB)]

Bowen LI (Lanzhou School of Nuclear Science and Technology, China)
Contributions of metastable states and non-Maxwellian EEDF to electron-impact ionization of tungsten ions
[abstract (pdf)] [presentation (pdf: 2.9 MB)]

MURAKAMI Izumi (National Institute for Fusion Science, Japan)
Extreme ultraviolet spectra and collisional-radiative model for mid-charged tungsten ions
[abstract (pdf)]

Martin O'MULLANE (Department of Physics, University of Strathclyde, United Kingdom)
Update on atomic data and population models for hydrogen and tungsten
[abstract (pdf)] [presentation (pdf: 3.1 MB)]

Martin O'MULLANE (Department of Physics, University of Strathclyde, United Kingdom)
Atomic and molecular data: summary (modelling activities)

Ewa PAWELEC (University of Opole, Poland)
Challenges in the analysis of the spectra of tritium-containing molecules
[abstract (pdf)] [presentation (pdf: 1.8 MB)]

Liam SCARLETT (Faculty of Science and Engineering, Curtin University, Australia)
Electron collisions with molecular hydrogen and its isotopologues
[abstract (pdf)]

David TSKHAKAYA (Institute of Plasma Physics of the Czech Academy of Sciences, Czechia)
Atomic data needs for studying of W sputtering in high density divertor plasmas
[abstract (pdf)] [presentation (pdf: 1.9 MB)]

Kevin VERHAEGH (Eindhoven University of Technology, Netherlands)
The importance of plasma-chemistry in detached plasmas and the need for updated rates through CRM
[abstract (pdf)] [presentation (pdf: 5.2 MB)]

Udo VON TOUSSAINT (Max Planck Institute for Plasma Physics, Garching, Germany)
Modelling of Reflection and Sputtering properties from structured and crystalline surfaces: Old and new insights

Sven WIESEN (Dutch Institute for Fundamental Energy Research (DIFFER), Netherlands)
Detailed charge exchange neutral distribution modelling for the ITER main wall
[presentation (pdf: 1.9 MB)]

Sven WIESEN (Dutch Institute for Fundamental Energy Research (DIFFER), Netherlands)
Fusion devices: summary (modelling activities)
[presentation (pdf: 1.9 MB)]

Dirk WÜNDERLICH (Max Planck Institute for Plasma Physics, Garching, Germany)
Vibrationally and ro-vibrationally resolved collisional radiative modelling of molecular hydrogen: current status and outlook
[abstract (pdf)] [presentation (pdf: 1.2 MB)]

Dirk WÜNDERLICH (Max Planck Institute for Plasma Physics, Garching, Germany)
Collisional-radiative modelling: summary

Ling ZHANG (Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), China)
Tungsten density and influx evaluations based on the latest atomic data in EAST tokamak plasma
[abstract (pdf)] [presentation (pdf: 6.6 MB)]

Posters

There are 3 poster presentations at this event.

Haikel JELASSI (National Center of Nuclear Sciences and Technologies (CNSTN), Tunisia)
Energy levels, transition rates, lifetimes of transmutation of tungsten atoms He-like-(Hf, Ta, Re and Os) deduced from relativistic multiconfiguration Dirac-Hartree-Fock and many body perturbation theory calculations
[abstract (pdf)]

Ahmed LASHIN (Egyptian Atomic Energy Authority, Egypt)
Redesign of EAEA Plasma Focus Device-1
[abstract (pdf)] [presentation (pdf: 414.2 KB)]

Faridodin SEDIGHI (Nuclear Science and Technology Research Institute, Iran)
The side Effects of Hydrogen ions on Tungsten Surface due to Glow Discharge Cleaning procedure in Damavand Tokamak
[abstract (pdf)]