Hans Höft
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View article: Discharge dynamics in a cylindrical SDBD prototype reactor under ns-pulsed and sinusoidal AC operation
Discharge dynamics in a cylindrical SDBD prototype reactor under ns-pulsed and sinusoidal AC operation Open
We developed a prototype reactor generating surface dielectric barrier discharges (SDBDs) in ambient air, designed for reliable operation while preventing constructive material degradation. It features stainless steel electrodes and quartz…
View article: Plasma Diffuse Reflectance Infrared Fourier Transform Spectroscopy Cell Design and Experimental Set‐Up for Operando‐DRIFTS Investigations on Plasma‐Induced Heterogeneous Catalyzed Reactions
Plasma Diffuse Reflectance Infrared Fourier Transform Spectroscopy Cell Design and Experimental Set‐Up for Operando‐DRIFTS Investigations on Plasma‐Induced Heterogeneous Catalyzed Reactions Open
Herein, the development and application of a customized nonthermal plasma diffuse reflectance infrared Fourier transform spectroscopy cell based on the Harrick reaction chamber is presented, which integrates a miniaturized dielectric barri…
View article: Discharge modes of self-pulsing discharges in argon at atmospheric pressure
Discharge modes of self-pulsing discharges in argon at atmospheric pressure Open
Self-pulsing discharges are an intriguing method to generate non-thermal plasma using DC high voltages. However, the sophisticated interaction between the electrical circuit and the actual plasma characteristics is still not well explored.…
View article: Machine learning assisted optical diagnostics on a cylindrical surface dielectric barrier discharge
Machine learning assisted optical diagnostics on a cylindrical surface dielectric barrier discharge Open
The present study explores combining machine learning (ML) algorithms with standard optical diagnostics (such as time-integrated emission spectroscopy and imaging) to accurately predict operating conditions and assess the emission uniformi…
View article: Machine learning assisted optical diagnostics on a cylindrical atmospheric pressure surface dielectric barrier discharge
Machine learning assisted optical diagnostics on a cylindrical atmospheric pressure surface dielectric barrier discharge Open
The present study explores combining machine learning (ML) algorithms with standard optical diagnostics (such as time-integrated emission spectroscopy and imaging) to accurately predict operating conditions and assess the emission uniformi…
View article: On the Development and Characterization of the Novel Portable Plasma Device "MobiPlas"
On the Development and Characterization of the Novel Portable Plasma Device "MobiPlas" Open
A novel, portable noble gas plasma source called MobiPlas which is designed for medical applications is presented. This atmospheric pressure plasma jet (APPJ) features an integrated gas supply system using a refillable steel gas tank and w…
View article: DBD-like and electrolytic regimes in pulsed and AC driven discharges in contact with water
DBD-like and electrolytic regimes in pulsed and AC driven discharges in contact with water Open
The interaction of an ambient air plasma with a water surface in a pin–water electrode configuration is presented in a polydiagnostic study. A discharge was generated by applying different high-voltage (HV) waveforms to a metallic pin elec…
View article: Peculiarities of measuring fluorescence decay times by a streak camera for ps-TALIF experiments in reactive plasmas
Peculiarities of measuring fluorescence decay times by a streak camera for ps-TALIF experiments in reactive plasmas Open
We present a detailed methodology for (i) correctly configuring a streak camera to capture raw picosecond two-photon absorption laser induced fluorescence signals (ps-TALIF) of H-atom in low- and atmospheric-pressure plasmas, and (ii) prop…
View article: Formation mechanisms of striations in a filamentary dielectric barrier discharge in atmospheric-pressure argon
Formation mechanisms of striations in a filamentary dielectric barrier discharge in atmospheric-pressure argon Open
Formation mechanisms of striations along the discharge channel of a single-filament dielectric barrier discharge (DBD) in argon at atmospheric pressure are investigated by means of a time-dependent, spatially two-dimensional fluid-Poisson …
View article: Plane Parallel Barrier Discharges for Carbon Dioxide Splitting: Influence of Discharge Arrangement on Carbon Monoxide Formation
Plane Parallel Barrier Discharges for Carbon Dioxide Splitting: Influence of Discharge Arrangement on Carbon Monoxide Formation Open
A planar volume dielectric barrier discharge (DBD) in pure carbon dioxide (CO2) for the formation of carbon monoxide (CO) is examined by combined electrical and CO density measurements. The influence of the type of electrode, the barrier m…
View article: Exploring the mechanisms leading to diffuse and filamentary modes in dielectric barrier discharges in N$$_2$$ with N$$_2$$O admixtures
Exploring the mechanisms leading to diffuse and filamentary modes in dielectric barrier discharges in N$$_2$$ with N$$_2$$O admixtures Open
The effects of nitrous oxide (N $$_2$$ O) in nitrogen (N $$_2$$ ) on the development and morphology of sine-driven dielectric barrier discharges in a single-filament arrangement were studied. Detailed insight in the characteristics o…
View article: Gas Flow Shaping via Novel Modular Nozzle System (MoNoS) Augments kINPen-Mediated Toxicity and Immunogenicity in Tumor Organoids
Gas Flow Shaping via Novel Modular Nozzle System (MoNoS) Augments kINPen-Mediated Toxicity and Immunogenicity in Tumor Organoids Open
Medical gas plasma is an experimental technology for anticancer therapy. Here, partial gas ionization yielded reactive oxygen and nitrogen species, placing the technique at the heart of applied redox biomedicine. Especially with the gas pl…
View article: Formation mechanisms of striations in a filamentary dielectric barrier discharge in atmospheric pressure argon
Formation mechanisms of striations in a filamentary dielectric barrier discharge in atmospheric pressure argon Open
Formation mechanisms of striations along the discharge channel of a single-filament dielectric barrier discharge (DBD) in argon at atmospheric pressure are investigated by means of a time-dependent, spatially two-dimensional fluid-Poisson …
View article: PRE-IONIZATION IN ATMOSPHERIC PRESSURE TOWNSEND DISCHARGES (APTD): SURFACE VS VOLUME MECHANISMS
PRE-IONIZATION IN ATMOSPHERIC PRESSURE TOWNSEND DISCHARGES (APTD): SURFACE VS VOLUME MECHANISMS Open
International audience
View article: Upscaling from single- to multi-filament dielectric barrier discharges in pulsed operation
Upscaling from single- to multi-filament dielectric barrier discharges in pulsed operation Open
A study on the scalability of discharge characteristics of a single-filament dielectric barrier discharge (DBD) to a spatially one-dimensional multi-filament arrangement driven by the same high-voltage (HV) pulses was performed for a gas m…
View article: The importance of pre-ionization on surface and volume for Atmospheric Pressure Townsend Discharges (APTD)
The importance of pre-ionization on surface and volume for Atmospheric Pressure Townsend Discharges (APTD) Open
International audience
View article: Impact of the electrode proximity on the streamer breakdown and development of pulsed dielectric barrier discharges
Impact of the electrode proximity on the streamer breakdown and development of pulsed dielectric barrier discharges Open
The impact of the electrode proximity on the streamer breakdown and development of pulsed-driven dielectric barrier discharges (DBDs) in a single-filament arrangement has been investigated in a gas mixture of 0.1 vol% O 2 in N 2 at 0.6 bar…
View article: Effective streamer discharge control by tailored nanosecond-pulsed high-voltage waveforms
Effective streamer discharge control by tailored nanosecond-pulsed high-voltage waveforms Open
In this paper we present our solid-state nanosecond pulse source (the solid-state impedance-matched Marx generator) which can generate arbitrary waveforms and which can be used for pulsed discharge generation. The purpose of the developmen…
View article: Effect of a high-voltage mesh electrode on the volume and surface characteristics of pulsed dielectric barrier discharges
Effect of a high-voltage mesh electrode on the volume and surface characteristics of pulsed dielectric barrier discharges Open
Electrical breakdown in a pulsed asymmetric dielectric barrier discharge between a glass-covered mesh electrode and a grounded metal electrode in the air at atmospheric pressure is investigated. Volume discharge forms between the metal tip…
View article: Double-propagation mode in short-gap spark discharges driven by HV pulses with sub-ns rise time
Double-propagation mode in short-gap spark discharges driven by HV pulses with sub-ns rise time Open
The object of this study is the investigation of spark discharges ignited by unipolar positive rectangular high voltage (HV) pulses with 200 ps rise time and (15 ± 2) kV amplitude with 3 ns duration full width at half maximum in synthetic …