Weltmann, Klaus-Dieter

Validation of THz absorption spectroscopy by a comparison with ps-TALIF measurements of atomic oxygen densities

This data set contains the data shown in the corresponding publication in Applied Physics Letters (https://doi.org/10.1063/5.0160303). This publication presents a benchmark of THz absorption spectroscopy against a more established method. Atomic oxygen densities were measured with THz absorption spectroscopy and compared to those obtained from picosecond (ps) two-photon absorption laser induced fluorescence (TALIF) measurements on the same capacitively coupled radio frequency oxygen discharge.

Plasma Chemical Processes

Terahertz absorption spectroscopy for measuring atomic oxygen densities in plasmas - Dataset

This data set contains the data shown in the corresponding publication in Plasma Sources Science and Technology (https://doi.org/10.1088/1361-6595/acb815). This publication presents the first implementation of terahertz (THz) quantum cascade lasers (QCLs) for high-resolution absorption spectroscopy on plasmas. Absolute densities of ground state atomic oxygen were directly obtained by using the fine structure transition at approximately 4.75 THz.

Plasma Chemical Processes

Exploring the mechanisms leading to diffuse and filamentary modes in dielectric barrier discharges in N2 with N2O admixtures - Dataset

The effects of nitrous oxide (N2O) in nitrogen (N2) on the development and morphology of sine-driven dielectric barrier discharges in a single-filament arrangement were studied. Detailed insight in the characteristics of the discharge and its development were obtained from electrical measurements combined with ICCD and streak camera recordings as well as numerical modelling. A miniaturised atmospheric pressure Townsend discharge (APTD) could be generated for admixtures up to 5vol% N2O in N2 although N2O is an efficient collisional quencher of metastable nitrogen molecules.

Plasma Chemical Processes

Impact of the electrode proximity on the streamer breakdown and development of pulsed dielectric barrier discharges - Dataset

Presented data was obtained from the analysis of the impact of the electrode proximity on the streamer breakdown and development of pulsed-driven dielectric barrier discharges (DBDs) in a singlefilament arrangement in a gas mixture of 0.1 vol% O2 in N2 at 0.6 bar and 1.0 bar. The gap distance was varied from 0.5 mm to 1.5 mm, and the applied voltage was adapted correspondingly to create comparable breakdown conditions in the gap. Fast electrical measurements provided insight into discharge characteristics such as the transferred charge and consumed energy.

Plasma Chemical Processes

System and method for operating a plasma jet configuration

Plasma Medicine

The invention relates to a system (1) for generating and controlling a non-thermal atmospheric pressure plasma, comprising: - a discharge space (10) into which a working gas can be introduced via a first opening (12), wherein a plasma (5) can be generated in the discharge space (10), wherein the discharge space (10) has a second opening (14), so that the plasma (5, 6) can exit from the discharge space (10) through this second opening (14) and - at least one high-voltage electrode (20) for generating an electromagnetic field for generating a plasma (5) in the discharge space (10).

System and method for treating surfaces of bodies, in particular for wound treatment

Plasma Medicine

The invention relates to a system for treating surfaces of bodies, in particular a vacuum dressing, comprising at least one attachment means (5a) for fluidic attachment of a negative-pressure generator for generating a negative pressure in a volume that can be positioned at the surface of a body, and at least one means for plasma generation (8, 8a, 15) with which the volume in which the negative pressure can be generated can be at least partially filled with plasma or a plasma-activated medium.

Device, system, and method for antimicrobial treatment, method for producing the device, and computer program

Plasma Medicine

The invention relates to a device, to a system, and to a method for antimicrobial treatment during performance of operations in bodies, to a method for producing the device, and to a computer program. A device (11) is provided for antimicrobial treatment during performance of operations, in particular minimally invasive operations, in bodies. Said device comprises a main body (1) for partial introduction into a body and at least one plasma source (12) arranged in at least one portion of the main body (1).

Plasma generating device, plasma generating system and method of generating plasma

Plasma Medicine

A device for generating plasma (1) comprises a high voltage electrode (10) as well as at least one external electrode (11, 12), wherein the high voltage electrode (10) at least in one coordinate direction (34) is arranged between conductive material of at least one external electrode (11, 12). The high voltage electrode (10) is covered with a dielectric (21) at least one side facing an external electrode (11, 12).

Plasma generating device, plasma generating system, method of generating plasma and method for disinfecting surfaces

Plasma Medicine

The present invention relates to a plasma generating device which comprises an electrode carrier (5) and a first electrode (10) as well as a second electrode (20), the first electrode (10) being arranged on or in the electrode carrier (5).

Device for biologically decontaminating percutaneous access points and method therefor

Plasma Medicine

Disclosed is a device (1) for biologically decontaminating percutaneous access points or the stomata of patients, by means of a plasma generator (4) for generating a decontaminating plasma adjacently to a treatment surface (3) of the plasma generator (4). In order to at least partially surround a percutaneous access point or stomata, the treatment surface (3) is curved to be adaptable and can be laid against the percutaneous access point or stomata.