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Fusion research


Fusion energy holds the promise of providing safe, sustainable and low-carbon base-load energy that complements other energy sources like solar and wind. The fusion process uses abundant materials like deuterium from seawater and lithium and works by combining hydrogen atoms into helium like in the heart of the Sun. wiki

ECR Plasma

Within the European Co-fund Action Project EUROfusion we investigate and/or develop:

  • Edge Physics of Fusion Plasmas at the medium sized tokamak ASDEX-Upgrade
  • Plasma diagnostics methods based on the injection of fast neutral Li - beams Li - beams
  • Atomic data for fusion

In addition we have construct and built our own ion sources to produce beams of highly charged ions for our collision experiments:

  • ECR ion source: An all-permananet magnet 14.5 GHz Electron Cyclotron Resonance (ECR) ion sources (SOPHIE) has been built and is used for production of highly charged ion beams.


Fusion research group of Fritz Aumayr at TU Wien

Aumayr fusion research group at TU Wien

Our contribution to Europe´s nuclear fusion research program

Our group takes part in the Austrian Fusion Research Programme Fusion@ÖAW coordinated by the Austrian Academy of Sciences (ÖAW).
As an affiliated entity to ÖAW we participate in the large European Fusion Research Programm EUROfusion.

read more about the EUROfusion Research Programme in Austria, 2014-2020 (in English)

EUROfusion is the largest consortium of fusion researchers in the world. Together, its 30 member institutes and 150 affiliated universities and companies work to advance the field by executing scientific research and technological development along the European Research Roadmap to the Realisation of Fusion Energy.

Our latest contribution to fusion research: A new solution for the instability problem

QCE regime

For fusion reactors like ITER, plasma instabilities are a major challenge. Now our group at IAP/TU Wien together with IPP Garching) could demonstrate: There is an operational regime for fusion reactors that avoids this problem. Instead of large potentially destructive instabilities, one intentionally accepts many small instabilities that do not pose a problem for the reactor’s walls. The results have now been published in Physical Review Letters and featured in Physics (APS) as well as PhysicsWorld (IOP). Read more.

EUROfusion researchers achieve a new record for sustained energy from fusion

Researchers from the EUROfusion consortium, of our research group is affiliated to, used EUROfusions flagship device the Joint European Torus (JET) to release a record 59 megajoules of sustained fusion energy. The record and the scientific data from these crucial experiments are a major boost for ITER, the larger and more advanced version of JET. Watch the interview Fritz Aumayr gave to Puls 4 TV.

Link auf Youtube


ITER is the world's largest magnetic confinement fusion experiment currently under construction in the south of France https://www.iter.org/. The project aims to demonstrate the feasibility of fusion as a sustainable energy source, harnessing the power of the sun to produce clean and abundant energy. The ultimate goal is to achieve a net energy gain, where the fusion reactions generate more energy than is required to initiate and sustain the hot plasma. You can witness the progress firsthand by watching the short film produced by Fritz Aumayr during his latest tour of ITER.

Selected reprints

Edge Physics of Fusion Plasmas

G. F. Harrer, M. Faitsch, L. Radovanovic, E. Wolfrum, C. Albert, A. Cathey, M. Cavedon, M. Dunne, T. Eich, R. Fischer, M. Griener, M. Hoelzl, B. Labit, H. Meyer, and F. Aumayr
Quasicontinuous exhaust scenario for a fusion reactor: The renaissance of small edge localized modes
Physical Review Letters 129 (2022) 165001 (7 pages)

L. Radovanovic, M. G. Dunne, E. Wolfrum, G. F. Harrer, M. Faitsch, R. Fischer, F. Aumayr, and the ASDEX Upgrade Team
Ideal Ballooning Stability Analysis of the Pedestal in Highly Shaped Plasmas
Nuclear Fusion 62 (2022) 086004 (12 pages)

G. F. Harrer, E. Wolfrum, M. G. Dunne, P. Manz, M. Cavedon, P. T. Lang, B. Kurzan, T. Eich, B. Labit, J. Stober, H. Meyer, M. Bernert, F. Laggner, and F. Aumayr, and the Eurofusion MST1 Team, and the ASDEX Upgrade Team

Parameter dependences of small edge localized modes (ELMs)
Nuclear Fusion 58 (2018) 112001 (10 pages)

F. M. Laggner, E. Wolfrum, M. Cavedon, M. G. Dunne, G. Birkenmeier, R. Fischer, M. Willensdorfer, F. Aumayr, the EUROfusion MST1 Team and the ASDEX Upgrade Team
Plasma shaping and its impact on the pedestal of ASDEX Upgrade: Edge stability and inter-ELM dynamics at varied triangularity
Nuclear Fusion 58 (2018) 046008 (13 pages)

F. M. Laggner, E. Wolfrum, M. Cavedon, F. Mink, M. Bernert, M. G. Dunne, P. A. Schneider, A. Kappatou, G. Birkenmeier, R. Fischer, M. Willensdorfer, F. Aumayr, the EUROfusion MST1 Team and the ASDEX Upgrade Team
Pedestal structure and inter-ELM evolution for different main ion species in ASDEX Upgrade
Physics of Plasmas 24 (2017) 056105 (8 pages)

F.M. Laggner, E. Wolfrum, M. Cavedon, F. Mink, E. Viezzer, M.G. Dunne, P. Manz, H. Doerk, G. Birkenmeier, R. Fischer, S. Fietz, M. Maraschek, M. Willensdorfer, F. Aumayr, the EUROfusion MST1 Team and the ASDEX Upgrade Team
High frequency magnetic fluctuations correlated with the inter-ELM pedestal evolution in ASDEX Upgrade
Plasma Phys. Control. Fusion 58 (2016) 065005 (8 pages)

M. Willensdorfer, E. Fable, E. Wolfrum, F. Aumayr, R. Fischer, F. Reimold, F. Ryter, the ASDEX Upgrade Team
Role of electron temperature in the particle transport in the pedestal during pedestal evolution
Journal of Nuclear Materials 463 (2015) 1091 - 1095


A. Lopez-Cazalilla, C. Cupak, M. Fellinger, F. Granberg, P. S. Szabo, A. Mutzke, K. Nordlund, F. Aumayr, and R. González-Arrabal
Comparative study regarding the sputtering yield of nanocolumnar tungsten surfaces under Ar+ irradiation
Physical Review Materials 6 (2022) 075402 (13 pages)

C. Cupak, E. Pitthan, M. V. Moro, M. Fellinger, D. Primetzhofer, and F. Aumayr
Retention of deuterium in beryllium: A combined investigation using TDS, ERDA and EBS
Nuclear Materials and Energy 33 (2022) 101249 (7 pages)

P. S. Szabo, D. Weichselbaum, H. Biber, C. Cupak, A. Mutzke, R. A. Wilhelm, and F. Aumayr
Graphical user interface for SDTrimSP to simulate sputtering, ion implantation and the dynamic effects of ion irradiation
Nuclear Instruments and Methods in Physics Research B 522 (2022) 47 – 53

P. S. Szabo, C. Cupak, H. Biber, N. Jäggi, A. Galli, P. Wurz, and F. Aumayr
Analytical model for the sputtering of rough surfaces
Surfaces and Interfaces 30 (2022) 101924 (11 pages)

C. Cupak, P. S. Szabo, H. Biber, R. Stadlmayr, C. Grave, M. Fellinger, J. Brötzner, R. A. Wilhelm, W. Möller, A. Mutzke, M. V. Moro, and F. Aumayr
Sputter yields of rough surfaces: Importance of the mean surface inclination angle from nano- to microscopic rough regimes
Applied Surface Science 570 (2021) 151204Read more

K. Kantre, P. S. Szabo, M. V. Moro, C. Cupak, R. Stadlmayr, L. Z. Medina, F. Aumayr and D. Primetzhofer
Combination of in-situ ion beam analysis and thermal desorption spectroscopy for studying deuterium implanted in tungsten
Physica Scripta 96 (2021) 124004 (8 pages)

R. Stadlmayr, P.S. Szabo, D. Mayer, C. Cupak, T. Dittmar, L. Bischoff, S. Möller, M. Rasiński, R.A. Wilhelm, W. Möller, F. Aumayr
Sputtering of Nanostructured Tungsten and Comparison to Modelling with TRI3DYN
Journal of Nuclear Materials 532 (2020) 152019 (9 pages)

R. Stadlmayr, P.S. Szabo, D. Mayer, C. Cupak, W. Möller, and F. Aumayr
Erosion of iron-tungsten model films by deuterium ion irradiation: a benchmark for TRI3DYN
Physica Scripta T171 (2020) 014021 (6 pages)

L. Ballauf, F. Hechenberger, R. Stadlmayr, T. Dittmar, M. Daxner, S. Zöttl, F. Aumayr, Z. Herman, and P. Scheier
Formation of beryllium-hydrogen ions in chemical sputtering from 20 to 420 eV
Nuclear Materials and Energy 22 (2020) 100722 (8 pages)

R. Stadlmayr, P.S. Szabo, B.M. Berger, C. Cupak, R. Chiba, D. Blöch, D. Mayer, B. Stechauner, M. Sauer, A. Foelske-Schmitz, M. Oberkofler, T. Schwarz-Selinger, A. Mutzke, and F. Aumayr

Fluence dependent changes of surface morphology and sputtering yield of iron: comparison of experiments with SDTrimSP-2D
Nuclear Instruments and Methods in Physics Research B 430 (2018) 42 - 46

B. M. Berger, P. S. Szabo, R. Stadlmayr, and F. Aumayr
Sputtering measurements using a quartz crystal microbalance as a catcher
Nuclear Instruments and Methods in Physical Research B 406 (2017) 533–537

B.M. Berger, R. Stadlmayr, D. Blöch, E. Gruber, K. Sugiyama, T. Schwarz-Selinger, and F. Aumayr
Erosion of Fe-W model system under normal and oblige D ion irradiation
Nuclear Materials and Energy (2017) doi: 10.1016/j.nme.2017.03.030

B. M. Berger, R. Stadlmayr, G. Meisl, M. Cekada, C. Eisenmenger-Sittner, T. Schwarz-Selinger, and F. Aumayr
Transient effects during erosion of WN by deuterium ions studied with the quartz crystal microbalance technique
Nuclear Instruments and Methods in Physical Research B 382 (2016) 82–85

M. Oberkofler, D.Alegre, F. Aumayr, S. Brezinsek, T. Dittmar, K. Dobes, D. Douai, A. Drenik, M. Köppen, U. Kruezi, Ch. Linsmeier, C.P. Lungu, G. Meisl, M. Mozetic, C. Porosnicu, V. Rohde, S. G. Romanelli , the ASDEX Upgrade team and JET EFDA Contributors
Plasma–wall interactions with nitrogen seeding in all-metal fusion devices: Formation of nitrides and ammonia
Fusion Engineering and Design 98 - 99 (2015) 1371 - 1374

K. Dobes, M. Köppen, M. Oberkofler, C.P. Lungu, C. Porosnicu, Ch. Linsmeier, and F. Aumayr
Dynamics of Beryllium Surfaces with Nitrogen and Deuterium Projectiles
EUROfusion Pinboard Preprint (2015) WPPFC–PR(14)01

K. Dobes, V. Smejkal, T. Schäfer, and F. Aumayr
Interaction between seeding gas ions and nitrogen saturated tungsten surfaces
International Journal of Mass Spectrometry and Ion Processes 365-366 (2014) 64 - 67

K. Dobes, M. Köppen, M. Oberkofler, C.P. Lungu, C. Porosnicu, T. Höschen, G. Meisl, C. Linsmeier, and F. Aumayr
Interaction of nitrogen ions with beryllium surfaces
Nuclear Instruments and Methods in Physical Research B 340 (2013) 34 - 38

K. Dobes, P. Naderer, C. Hopf, T. Schwarz-Selinger, and F. Aumayr
Transient effects during sputtering of a-C:H surfaces by nitrogen ions
Nuclear Instruments and Methods in Physics Research B 286 (2012) 20 - 24

K. Dobes, P. Naderer, N. Lachaud, C. Eisenmenger-Sittner and F. Aumayr
Sputtering of tungsten by N+ and (N2)+ ions – investigations of molecular effects
Physica Scripta T145 (2011) 014017 (4 pages)

A. Golczewski, K. Dobes, G. Wachter, M. Schmid, and F. Aumayr
A quartz-crystal-microbalance technique to investigate ion - induced erosion of fusion relevant surfaces
Nuclear Instruments and Methods in Physics Research B 267 (2009) 695 - 699

A. Golczewski, A. Kuzucan, K. Schmid, J. Roth, M. Schmid, and F. Aumayr
Ion - induced erosion of tungsten surfaces studied by a sensitive quartz-crystal-microbalance technique
Journal of Nuclear Materials 390–391 (2009) 1102–1105

Beam diagnostics and modelling

M. Willensdorfer, G. Birkenmeier, R. Fischer, F.M. Laggner, E. Wolfrum, G. Veres, F. Aumayr, D. Carralero, L. Guimarãis, B. Kurzan and the ASDEX Upgrade Team
Characterization of the Li-BES at ASDEX Upgrade
Plasma Physics and Controlled Fusion 56 (2014) 025008 (10 pages)

M. Willensdorfer, E. Wolfrum, R. Fischer, J. Schweinzer, M. Sertoli, B. Sieglin, G. Veres, and F. Aumayr
Improved chopping of a lithium beam for plasma edge diagnostic at ASDEX Upgrade
Review of Scientific Instruments 83 (2012) 023501 (7 pages)

H. D. Falter, M. Proschek, S. Menhart, F. Aumayr, HP. Winter, D. Ciric, S. Cox , A. Dines, D. Godden, N. Hawkes and T.T.C. Jones
Helium doped hydrogen or deuterium beam as cost effective and simple tool for plasma spectroscopy
Review Scientific Instruments 71 (2000) 3723

R. Brandenburg, J. Schweinzer, S. Fiedler, F. Aumayr and HP. Winter
Modelling of fast neutral Li beams for fusion edge plasma diagnostics
Plasma Physics and Controlled Fusion 41 (1999) 471 - 484

S. Fiedler, R. Brandenburg, J. Baldzuhn, K. McCormick, F. Aumayr, J. Schweinzer, HP. Winter, W7-AS and ASDEX-Upgrade team
Edge plasma diagnostics on W7-AS and ASDEX-Upgrade using fast Li beams
Journal of Nuclear Materials 266-269 (1999) 1279 - 1284

E. Wolfrum, F. Aumayr, D. Wutte, HP. Winter, E. Hintz, D. Rusbüldt and R.P. Schorn
Fast lithium - beam spectroscopy of tokamak edge plasmas
Review of Scientific Instruments 64 (1993) 2285 - 2292

Atomic Data for Fusion

K. Igenbergs, J. Schweinzer, I. Bray, D. Bridi, and F. Aumayr
Database for Inelastic Collisions of Sodium Atoms with Electrons, Protons, and Multiply Charged Ions
Atomic Data and Nuclear Data Tables 94 (2008) 981 – 1014

J. Schweinzer, R. Brandenburg, I. Bray, R. Hoekstra,, F. Aumayr, R.K. Janev and HP. Winter
Database for inelastic collisions of lithium atoms with electrons, protons and multiply charged ions
Atomic Data and Nuclear Data Tables 72 (1999) 239 - 273

D. Wutte, R.K. Janev 8) , F. Aumayr, M. Schneider, J. Schweinzer 9) , J.J. Smith 8) and HP. Winter
Cross sections for Collision Processes of Li atoms interacting with electrons, protons, multicharged ions and hydrogen molecules
Atomic Data and Nuclear Data Tables 65 (1997) 155 - 180

ECR ion source development

E. Galutschek, R. Trassel, E. Salzborn, F. Aumayr and HP. Winter
Compact, low-cost, 14.5 GHz all-permanent magnet field ECR multiply charged ion source
Preprint in pdf-Format

M. Leitner, D. Wutte, J. Brandstötter, F. Aumayr and HP. Winter
Single-stage 5-GHz ECR-multicharged ion source with high magnetic mirror ratio and biased disk
Review Scientific Instruments 65 (1994) 1091 - 1093

D. Wutte, M. Leitner and HP. Winter
A 2.45-GHz electron cyclotron resonance multi-mA Li+ ion gun for fusion plasma diagnostics
Review Scientific Instruments. 65 (1994) 1094 - 1096

atomic/plasma/index.txt · Last modified: 2023-10-16 21:44 (external edit)