Brno Ph.D. Talent award

Kryštof Mrózek was awarded by the Brno Ph.D. Talent project, with the topic Feasibility study of applicability of a novel low-pressure plasma source for supporting air-breathing electric propulsion system.

PSEW 2022

Martina Mrkvičková was invited to give a talk "Measurements of the electric field: four methods match" at the 9th Plasma Science & Entrepreneurship Workshop in York, United Kingdom.

New group photo

New paper

Lucia Kuthanová, Tomáš Hoder

Dynamics of microflow at the plasma–liquid interface

Scientific Reports, volume 12, Article number: 16665, Published: 05 October 2022

Full paper

Invited presentation at GEC IOPS

Lucia Kuthanová was invited to present at the GEC International Online Plasma Seminar (IOPS) on her work on 'Memory propagation in barrier discharge at water interface'. The presentation was recorded and can be viewed online here.

SPIG 2022

New paper

ESCAMPIG 2022 conference

Pedro Viegas gave a talk about "Modelling chemistry and transport in CO2 microwave discharges for CO2 conversion" at The XXV Europhysics Conference on the Atomic and Molecular Physics of Ionized Gases in Paris, France.

New paper

New paper

New paper

RIVA 2022 Conference

Pedro Viegas gave a talk about "Modelling chemistry and transport in CO2 microwave discharges for CO2 conversion" at RIVA 2022 - XII Iberian Vacuum and Applications Conference in Braga, Portugal.

New paper

Lucia Kuthanová and Tomáš Hoder

Memory propagation in barrier discharge at water interface: suspected Markov states and spatiotemporal memory effects

Plasma Sources Science and Technology, Volume 31, Number 4, Published 28 April 2022

Full paper

New paper

IOP Trusted Reviewr

Zdeněk Bonaventura has achieved "IOP Trusted Reviewer" status.

New paper

Topical review

New paper

New paper

Zdeněk Bonaventura, Petr Bílek, Ján Tungli and Milan Šimek

Analysis of secondary emission mechanism in electron avalanches propagating in cylindrical nanoruptures in liquid water

Plasma Sources Science and Technology, Volume 31, Number 3. Published 7 March 2022 • © 2022 IOP Publishing Ltd

Full paper

New open access paper

New paper

New group member

Nima Bolouki has join our group.

Letter in high impact journal

A. W. van de Steeg, L. Vialetto, A. F. Sovelas da Silva, P. Viegas, P. Diomede, M. C. M. van de Sanden, and G. J. van Rooij

The Chemical Origins of Plasma Contraction and Thermalization in CO2 Microwave Discharges

The journal of Physical Chemistry Letters (IF 6.475), p. 1203–1208, Published 28 January 2022

Full paper

New open access paper

Pedro Viegas, Elmar Slikboer, Zdenek Bonaventura, Enric Garcia‑Caurel, Olivier Guaitella, Ana Sobota and Anne Bourdon

Quantification of surface charging memory effect in ionization wave dynamics

Scientific Reports, volume 12, article number: 1181, Published 21 January 2022

Full paper

New paper

IGA project award

David Prokop was awarded by the IGA project, Advanced time-correlated single photon counting spectroscopy.

New Technology Agency of the Czech Republic (TAČR) project

The Technology Agency of the Czech Republic Théta project Streamers and discharges sliding on dielectric surfaces in SF6 alternatives has started on 1 January 2022 and will finish on 31 December 2024. Four partners, from both academic and private sectors, will collaborate during this project. The team members participating on the project from our university are: doc. Mgr. Tomáš Hoder, Ph.D., Mgr. Zdeněk Bonaventura, Ph.D., Jaromír Hašana, Mgr. Lucia Kuthanová, Ph.D., doc. Mgr. Pavel Slavíček, Ph.D., Mgr. Ján Tungli.

Corrigendum

First paper on air-breathing electric propulsion simulations!

SVC Travel Support Award

Andrej Roštek has been chosen to receive an SVC (Society of Vacuum Coaters) Travel Support Award for SVC Technical Conference 2022 in California, USA.

Gold medal of the Faculty of Science

The Dean of the Faculty of Science Tomáš Kašparovský honoured 36 personalities who had made a significant contribution to the development of the Faculty, and its departments and institutes, over the last few decades. Tomáš Hoder and Pavel Dvořák were among the laureates. Congratulations!

New group photo

New equipment

We equipped our laboratory with a new toy: laser system from Ekspla, producing picosecond pulses with wavelengths tunable in range 193 – 2300 nm.

IOP Trusted Reviewers

Tomáš Hoder, Pedro Viegas and Zdeněk Bonaventura have all achieved "IOP Trusted Reviewer" status.

VD workshop

Several of our colleagues gave talks or presented posters this November in Prague at the 8th Plasma Science & Entrepreneurship Workshop.

Vice-Rector's Award

Petr Bílek and his supervisor Zdeněk Bonaventura won the Vice-Rector's Award of Masaryk University for Excellence in Doctoral Studies.

New paper

New paper

New paper

GEC 2021 conference

Even though the 74th Annual Gaseous Electronics Conference was held as a virtual only event, it was one of the major events for our group this year. We have given 2 invited talks, 3 regular talks and presented 2 posters.

Invited talk - Tomáš Hoder: Streamer discharges, their initiation and electric field

Abstract: Streamer discharges are present in many fields of science. They are basic components of atmospheric electricity and frequently utilized sources of non-equilibrium plasmas, both in fundamental research and applications. Three cases from the physics of streamer discharges are discussed in this presentation. In a free space, the quasi-stationary phase of the streamer development is a well understood phenomenon. Nevertheless the very first stages of the initiation of the streamer in pulse driven discharges lack an experimental understanding, mostly due to the diagnostical challenges connected with the high streamer velocity and its stochastic occurrence. Here, we offer an approach for such detailed diagnostics. In a similar way, the complexity and high velocity of streamer discharges developing on dielectric surfaces is the reason for unanswered questions or lack of experimental data in the field. We offer experimentally based answers to two such questions: What amplitudes can the electric field strength reach during the streamer-surface interaction? What is the initiation mechanism of long plasma filaments in surface barrier discharges? We apply the time-correlated single-photon counting-based optical emission spectroscopy to surface and coplanar barrier discharges in atmospheric air to study such phenomena. We show experimentally that the electric field amplitude reaches values of 400 kV/cm as the positive streamer propagates directly on the surface in a coplanar discharge arrangement. Furthermore, we reveal an ultra-fast development of a remotely initiated streamer cascade in the case of surface barrier discharge operated at high overvoltage. We show that this previously unknown mechanism leads to the generation of an intense cathode spot, which is a crucial condition for plasma transition to a highly-ionized state.

Abstract

Invited talk - Pedro Viegas: Effect of jet polarity on charging of a dielectric target: simulations and experiments

Abstract: The dynamical charging of a dielectric BSO target by an atmospheric pressure low-temperature plasma jet is addressed numerically and experimentally, using a two-dimensional fluid model and Mueller polarimetry measurements. The jet geometry is the same in experiments and simulations. The target is placed perpendicularly to the jet propagation and the jet is powered by rectangular pulses of applied voltage of different polarity and magnitude. The axial component of electric field inside the target is quantitatively compared between simulations and experiments, yielding excellent agreement for every studied condition, during and after the pulses. The electric field inside the target is closely related to the charge deposition on the target surface. It is shown that the spatial distribution of electric field inside the target during the pulse takes a different shape according to the jet polarity. Shortly after the pulse, charge deposition of opposite signal to the one of the applied voltage takes place. Finally, in the long time-scales in between pulses, the distributions of leftover surface charges on the target surface and leftover electric field inside the target are dependent on the polarity and magnitude of applied voltage. The discharge dynamics and the reasons behind these differences are investigated.

Abstract

Regular talks - Lucia Kuthanová, Lukáš Kusýn, Ján Tungli

• Lucia Kuthanová: Memory propagation in barrier discharge at water interface.
  
  

Abstract

• Lukáš Kusýn: Electric field and temperature patterns in lower-pressure streamer discharges.

Abstract

• Ján Tungli: Modelling of electron multiplication mechanism in nanovoids initiating the breakdown in liquid water.

Abstract

Posters - Martina Mrkvičková, Lucia Kuthanová

• Martina Mrkvičková: On the determination of electric field in atmospheric pressure DBD
  
  

Abstract

• Lucia Kuthanová: The phenomena at unstable plasma-liquid interface

Abstract

Plasma Froids seminary of CNRS

At Plasma Froids seminary of CNRS, Tomáš Hoder gave an invited talk "Ultra-fast plasma processes in gas and liquid".

Invited talk

Tomáš Hoder was invited to give a talk at the University Paul Sabatier, Toulouse, LAPLACE. His 40 minutes long presentation was titled "Filamentary barrier discharges: sub-nanosecond dynamics, electric field and memory effects".

Stay abroad

Tomáš Hoder spent September 2021 in the LAPLACE laboratory at the University of Paul Sabatier in Toulouse, France, as an invited professor. In cooperation with Dr.Nicolas Naudé, Dr.Antoine Belinger and Dr.Simon Dap they investigated homogeneous barrier discharges in Townsend and glow regimes at atmospheric pressure.

Letter in high-impact journal

Alex van de Steeg, Pedro Viegas, Ana Silva, Tom Butterworth, Alexander van Bavel, Joost Smits, Paola Diomede, Mauritius van de Sanden, and Gerard van Rooij

Redefining the Microwave Plasma-Mediated CO2 Reduction Efficiency Limit: The Role of O–CO2 Association

ACS Energy Letters (impact factor 23.1), Volume 6, Number 8, published 26 July 2021

Full article

New paper

ECPD 2021 conference

Adam Obrusnik was invited to give a talk at the European Conference on Plasma Diagnostics.

Publishing spree

Two papers in PSST first-authored by Miroslav Šnírer were published less than three months apart.

New paper

IOP Outstanding reviewers

Tomáš Hoder and Pavel Dvořák have both been awarded as Outstanding reviewers of Plasma Sources Science and Technology journal in its 2020 Reviewer Awards.

New paper

Petr Bílek, Ján Tungli, Tomáš Hoder, Milan Šimek and Zdeněk Bonaventura

Electron–neutral bremsstrahlung radiation fingerprints the initial stage of nanosecond discharge in liquid water

Plasma Sources Science and Technology, Volume 30, Number 4, Published 9 April 2021

Full article

New paper

New paper

Colaboration with Technical university of Eindhoven

Lukáš Kusýn started colaboration with the group of prof. Sander Nijdam in Technical university of Eindhoven (TUE) in Eindhoven, Neatherlands.

New paper

New group member

Pedro Viegas joined our group.

New Czech Science Foundation (GAČR) project

The Czech Science Foundation project Advanced methods for ultra-fast diagnostics of transient argon-containing plasmas has started on 1 January 2021 and will finish on 31 December 2023. The team members participating on the project are: doc. Mgr. Tomáš Hoder, Ph.D., Mgr. Zdeněk Bonaventura, Ph.D., Jaromír Hašana, Mgr. Lucia Kuthanová, Ph.D., Mgr. Martina Mrkvičková, Ph.D., Mgr. Adam Obrusník, Ph.D., Ing. David Prokop and Petr Saul.

New paper

Invited talk

Tomáš Hoder was invited to give a talk at the Institute of Plasma and Atomic Physics, Universität Bochum, Germany.

• Tomáš Hoder: Streamer discharges on dielectric surface

VD workshop

Tomáš Hoder gave an invited talk at the 7th Plasma Science & Entrepreneurship Workshop in Bochum, Germany.

• Tomáš Hoder: New insights into barrier discharges

NANOCON 2020 conference

Vít Kudrle presented a poster at the12^th International Conference on Nanomaterials - Research & Application in Brno, Czech Republic.

GEC 2020 conference

Petr Bílek and Zdeněk Bonaventura have given their talks at the 73rd Annual Gaseous Electronics Conference.

Invited talk

Tomáš Hoder was invited to talk about "High-resolution diagnostics of transient non-thermal plasmas" at the Heyerovsky Institute, Prague, Czech Republic.

Milan Odehnal prize

Petr Bílek received a honorable mention in the Milan Odehnal prize. He was awarded for study of electric field in air plasmas. Congratulations!

New paper

New paper

New paper

New paper

New paper

New paper

Lucia Potočňáková, Petr Synek, and Tomáš Hoder

Viscous droplet in nonthermal plasma: Instability, fingering process, and droplet fragmentation

Physical Review E, Volume 110, Issue 6, Publishe 1 June 2020

Full paper

New paper

New paper

New paper

Colaboration with University of Córdoba

Miroslav Šnírer started colaboration with the group of prof. Calzada in Córdoba, Spain (UCO) during his Erasmus stay, dedicated to plasma diagnostics of graphene synthesis in TIAGO.

Invited topical review

Publishing spree

Two papers were published on the exact same day.

New paper

New paper

New paper

New paper

New paper

NANOCON 2019 conference

Martin Kubečka presented a poster at the 11th International Conference on Nanomaterials - Research & Application in Brno, Czech Republic.

New paper

LAPD 2019

Pavel Dvořák was invited to give a general talk about "Two-photon absorption laser-induced fluorescence measurement of atomic hydrogen in discharges and flames induced at atmospheric pressure" at Laser Aided Plasma Diagnostics in Whitefish, Montana, USA.

New paper

XXXIV ICPIG & ICRP-10 conferences

Zdeněk Bonaventura was invited to give a talk and Vít Kudrle presented a poster at The Joint Conference of XXXIV International Conference on Phenomena in Ionized Gases (XXXIV ICPIG) and the 10th International Conference on Reactive Plasmas (ICRP-10).

• Zdeněk Bonaventura: Streamer-induced kinetics of the ground and excited states in N2—O2 including highly excited and auto-ionizing states of atomic species
• KUDRLE, Vít, Miroslav ŠNÍRER, Jozef TOMAN, Ondřej JAŠEK and Jana JURMANOVÁ: Influence of admixtures on atmospheric pressure microwave plasma torch used for graphene nanosheets synthesis

EPS 2019 conference

Miroslav Šnírer and Jan Faltýnek participated at the 46th European Physical Society Conference on Plasma Physics in Milan, Italy.

ISPC24 symposium

Adam Obrusník gave a talk at the 24th International Symposium on Plasma Chemistry in Naples, Italy.

• OBRUSNÍK, Adam, Pavel DVOŘÁK and Jiří DĚDINA: Identifying the scaling parameters of neutral kinetics in DBD plasma atomizers using screening and variance-based sensitivity analysis

Frontiers 2019 conference

Lukáš Kusýn presented his poster at the 13th Frontiers in Low-Temperature Plasma Diagnostics & 1st Frontiers in Low-Temperature Plasma Simulations in Bad Honnef, Germany.

• L. Kusyn, P. Hoffer, Z. Bonaventura, T. Hoder: Automated determination of pressure profile generated by discharges in contact with liquid phase by interferometric technique

ECPD 2019 conference

Pavel Dvořák was invited to give a talk at the European Conference on Plasma Diagnostics in Lisbon, Portugal.

New paper

New paper

Edge article in high impact journal

Invited talk

Tomáš Hoder was invited to give a talk at the Bochum University, Germany.

• Tomáš Hoder: High-Resolution Spectroscopic and Electrical Diagnostics of Barrier Discharges

New group photo

IPS 2018 workshop

EFRE 2018 conference

Zdeněk Bonaventura was invited to give a talk at the 6th International Congress on Energy Fluxes and Radiation Effects in Tomsk, Russia.

• Zdenek Bonaventura, Olivier Chanrion, Anne, Bourdon, Torsten Neubert: Runaway electrons from streamer breakdown in short overvolted gaps
  

New paper

MD10 conference

Vít Kudrle was invited to give a talk at the Xth INTERNATIONAL WORKSHOP on MICROWAVE DISCHARGES: Fundamentals and Applications in Zvenigorod, Russia.

• KUDRLE, Vít, Miroslav ŠNÍRER, Jozef TOMAN, Ondřej JAŠEK, Jana JURMANOVÁ, Lucia POTOČŇÁKOVÁ and Jaroslav HNILICA: Self-organization in Microwave Filamentary Discharges
  

SPIG 2018 symposium

Tomáš Hoder was invited to give a talk at the 29th Summer School and International Symposium on the Physics of Ionized Gases in Belgrade, Serbia.

• Tomáš Hoder: High-Resolution High-Sensitivity Spectroscopic and Electrical Diagnostics of Barrier Discharges

Two-parts paper

New paper

ESCAMPIG 2018 conference

Miroslav Šnírer presented his poster at E‌urophysics Conference on the Atomic and Molecular Physics of Ionized Gases in Glasgow, UK.

• Snirer, M., Toman, J., Jašek, O., Kudrle, V., & Jurmanová, J.: Optical emission spectroscopy of gas mixing process during graphene nanosheets synthesis by dual channel microwave plasma torch at atmospheric pressure
  

EPS 2018

Miroslav Šnírer presented a poster at the 45th European Physical Society Conference on Plasma Physics in Prague, Czech Republic.

Best image in plasma science

Miroslav Šnírer won "Best image in plasma science" at 45th European Physical Society Conference on Plasma Physics. Congratulations!

New paper

New paper

DPG conference

Tomáš Hoder was invited to give a talk at 82. Jahrestagung der DPG und DPG-Frühjahrstagung in Erlangen, Germany.

• Tomáš Hoder: High-Resolution Spectroscopic and Electrical Diagnostics of Barrier Discharges

New paper

PhD. talent award

Lukáš Kusýn was awarded PhD. talent scholarship for the years 2018-2021.

New paper

HAKONE XV Editorial

Tomáš Hoder, the Vice-chair of the Local Organising Committee, and Mirko Černák, the Chair of the International Scientific Committee, have written the editorial for a special issue of Eur. Phys. J. Appl. Phys., dedicated to the HAKONE 2016 conference in Brno, organized by our department.

ISPC 23 conference

Jan Faltýnek gave a talk at the 23rd International Symposium on Plasma Chemistry in Montreal, Canada.

New paper

IWM 2017 workshop

Tomáš Hoder was invited to give a talk at the 9th International Workshop on Microplasmas in Garmisch-Partenkirchen, Germany.

• Tomáš Hoder: High-Resolution Spectroscopy of Microplasmas and Novel Software massiveOES for Spectra Analysis

New functionality in "massiveOES" software and a new paper

In order to precisely understand the non-equilibrium of rotational-vibrational state distribution from the investigated spectra without limiting presumptions, a state-by-state temperature-independent fitting procedure is the ideal approach. In this paper, we present an addition of novel software tool developed for this purpose into our previously published software massiveOES, freely available for the scientific community. The introduced tool offers a convenient way to construct Boltzmann plots even from partially overlapping spectra, in a user-friendly environment. We apply the novel software to the challenging case of OH spectra in surface streamer discharges generated from the triple-line of the argon/water/dielectrics interface.

Jan Voráč, Petr Synek, Vojtěch Procházka and Tomáš Hoder

State-by-state emission spectra fitting for non-equilibrium plasmas: OH spectra of surface barrier discharge at argon/water interface

Journal of Physics D: Applied Physics, Volume 50, Number 29, Published 30 June 2017

Full paper

SPM5 workshop

Tomáš Hoder was invited to give a talk at the 5th Workshop on Solution Plasma and Molecular Technologies in Greifswald, Germany.

• Tomáš Hoder: Surface Barrier Discharge at Solution/Gas Interface:Applications in Surface Treatment And Fundamental Physics

New paper

New paper

New paper

New GRAVARC paper

The fourth (and with its 15 pages by far the longest) paper about our hypergravity experiments with gliding arc was published recently. The hypergravity conditions up to 18g were achieved at Large Diameter Centrifuge in European Space Agency research centre in Netherlands, where we got access thanks to the Spin Your Thesis! student programme.

Lucia Potočňáková, Jiří Šperka, Petr Zikán, Jack J W A van Loon, Job Beckers and Vít Kudrle

Experimental study of gliding arc plasma channel motion: buoyancy and gas flow phenomena under normal and hypergravity conditions

Plasma Sources Science and Technology, Volume 26, Number 4, Published 20 March 2017

Full paper

New paper

New software "massiveOES" and paper

In this study, the need to batch process the massive datasets containing overlapping molecular spectra in order to obtain the spatio-temporal maps of rotational and vibrational temperatures has arisen. However, none of the publicly accessible software packages provides such functionality. We therefore developed a software, massiveOES, specifically to overcome these shortcomings. This software is now freely available to the scientific community. This paper, besides the plasma diagnostics results, also briefly discusses the data processing methods used by our software.

Jan Voráč, Petr Synek, Lucia Potočňáková, Jaroslav Hnilica and Vít Kudrle

Batch processing of overlapping molecular spectra as a tool for spatio-temporal diagnostics of power modulated microwave plasma jet

Plasma Sources Science and Technology, Volume 26, Number 2, Published 31 January 2017

Full paper