A5062721123- Particle accelerators and beam dynamics
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Atomic and Molecular Physics
- Astro and Planetary Science
- Ion-surface interactions and analysis
- Atmospheric Ozone and Climate
- Astrophysics and Star Formation Studies
- Fullerene Chemistry and Applications
- Nanopore and Nanochannel Transport Studies
- Gyrotron and Vacuum Electronics Research
- Planetary Science and Exploration
- Diamond and Carbon-based Materials Research
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Polymer Nanocomposite Synthesis and Irradiation
- Electron and X-Ray Spectroscopy Techniques
- Nuclear physics research studies
- Electrostatic Discharge in Electronics
- Laser-Plasma Interactions and Diagnostics
- Carbon Nanotubes in Composites
- Mass Spectrometry Techniques and Applications
- Atmospheric chemistry and aerosols
- Bone Tissue Engineering Materials
- Molecular Spectroscopy and Structure
HUN-REN Institute for Nuclear Research
2016-2025
University of Debrecen
2010-2023
University of Pecs
2023
Hungarian Academy of Sciences
2010-2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
2018
Istituto Nazionale di Fisica Nucleare
2018
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2018
Toyo University
2011
Osaka University
2011
Objectives: Using dental Ti implants has become a well-accepted and used method for replacing missing dentition. It evident that in many cases peri-implant inflammation develops. The objective was to create evaluate the antibacterial effect of silver nanoparticle (Ag-NP) coated surfaces can help prevent such processes if applied on surface implants. Methods: Annealing I, Ag ion implantation by beam an Electron Cyclotron Resonance Ion Source (ECRIS), Physical Vapor Deposition (PVD), II...
Experiments have recently demonstrated that kinetic instabilities occurring in magnetoplasma are huge limiting factors to the flux of highly charged ion beams extracted from ECR sources. Recently, it has been shown two-frequency-heating (TFH) mode proven potential mitigate these instabilities. Since fundamental physical mechanism TFH is still unclear, a deeper experimental investigation necessary. At ATOMKI-Debrecen, effect on an argon plasma 'two-close-frequency heating' scheme explored for...
Theoretical predictions as well experiments performed at storage rings have shown that the lifetimes of β-radionuclides can change significantly a function ionization state. In this paper we describe an innovative approach, based on use compact plasma trap to emulate selected stellar-like conditions. It has been proposed within PANDORA project (Plasmas for Astrophysics, Nuclear Decay Observation and Radiation Archaeometry) with aim measure, first time in plasma, nuclear β-decay rates...
ABSTRACT The recent detection of ethanolamine (EtA, HOCH$_2$CH$_2$NH$_2$), a key component phospholipids, i.e. the building blocks cell membranes, in interstellar medium is line with an exogenous origin life-relevant molecules. However, stability and survivability EtA molecules under inter/circumstellar Solar System conditions have yet to be demonstrated. Starting from assumption that mainly forms on ice grains, we systematically exposed EtA, pure mixed amorphous water (H$_2$O) ice,...
An experimental campaign aiming to investigate electron cyclotron resonance (ECR) plasma X-ray emission has been recently carried out at the ECRISs—Electron Cyclotron Resonance Ion Sources laboratory of Atomki based on a collaboration between Debrecen and Catania ECR teams. In first series, spectroscopy was performed through silicon drift detectors high purity germanium detectors, characterizing volumetric emission. The on-purpose developed collimation system suitable for direct density...
Abstract In this paper, the Atomki Accelerator Centre (AAC, Debrecen, Hungary) incorporating several small-sized particle accelerators is reviewed. The energy range of our for proton beam between 50 eV and 20 MeV. technical personnel organization AAC presented together with rules beamtime requests usage. Three (Cyclotron, ECRIS, Tandetron) are described in detail their descriptions main application fields. As an example highlights, a series unique low-energy ion–sample irradiations...
Gas-phase hydroxylamine (NH$_2$OH) has recently been detected within dense clouds in the interstellar medium. However, it is also likely present ices, as well on icy surfaces of outer Solar System bodies, where may react to form more complex prebiotic molecules such amino acids. In this work, we aimed provide IR spectra NH$_2$OH astrophysical ice analogues that will help search for molecule various environments. Furthermore, quantitative information stability upon exposure ionizing radiation...
Gas-phase hydroxylamine (NH_2OH) has recently been detected within dense clouds in the interstellar medium. However, it is also likely present ices, as well on icy surfaces of outer Solar System bodies, where may react to form more complex prebiotic molecules such amino acids. In this work, we aim provide infrared spectra NH_2OH astrophysical ice analogues that will help search for molecule various environments. Furthermore, quantitative information stability upon exposure ionising radiation...
Asteroids with the potential to impact Earth have become a significant focus of scientific research and applied space technology. These bodies are expected be key targets for mitigation actions mining activities in coming decades. Understanding their material characteristics is challenging due effects weathering, which alters mineral composition structure surfaces, resulting featureless infrared spectra. This study details laboratory tests artificial solar wind on meteorites, revealing...
The major reservoir of sulfur in dense interstellar clouds is still largely unknown, although a growing body evidence suggests that it may exist refractory form (i.e., as minerals or allotropes the element). Therefore, possible irradiation sulfur-free ices on top sulfur-rich grain components by cosmic rays stellar winds result formation simple inorganic molecules could be readily detected ground- space-borne telescopes. In this study, we have irradiated neat O2, CO, CO2, and H2O layers...
A relatively large yield of neutralized atoms was observed when 3 keV Ar${}^{7+}$ ions were guided trough polyethylene terephthalate nanocapillaries. Time and deposited-charge dependence the angular distribution both neutrals measured simultaneously using a two-dimensional multichannel plate detector. The increased significantly faster than that saturated typically at few percent level. In accordance with earlier observations, mean emission angle exhibited strong oscillations. For atoms,...
Pinhole and CCD based quasi-optical x-ray imaging technique was applied to investigate the plasma of an electron cyclotron resonance ion source (ECRIS). Spectrally integrated energy resolved images were taken from axial perspective. The comparison argon highlights structural changes affected by some ECRIS setting parameters, like strength magnetic confinement, RF frequency microwave power. Photon counting analysis gives precise intensity distribution emitted chamber walls. This advanced...
The ECR ion source has been operating in ATOMKI (Debrecen) since 1996. During the past 15 years lots of minor and numerous major technical modifications have carried out on ECRIS. Many these changes aimed increasing beams charge, intensity, widening choice. Another group were performed to develop special, non-standard operation modes or produce peculiar plasmas beams.
Magnetized plasmas in compact trap may become experimental environments for the investigation of nuclear β-decays astrophysical interest. In framework project PANDORA (Plasmas Astrophysics, Nuclear Decays Observation and Radiation Archaeometry) research activities are devoted to demonstrate feasibility an experiment aiming at correlating radionuclides lifetimes in-plasma ions charge state distribution (CSD). The paper describes multidiagnostics setup now available INFN-LNS, which allows...
Abstract In the frame of PANDORA_Gr3 project, aiming at measuring for first time in-plasma nuclear β -decays astrophysical interest, an innovative multi-diagnostic approach to correlate plasma parameters activity has been proposed [1–3]. This is based on several detectors and techniques (optical emission spectroscopy, RF systems, interferopolarimetry) here we focus high resolution spatially-resolved X-ray performed by means a pin-hole camera setup sensitive in 0.5–20 keV energy domain. We...
Low, medium or highly charged ions delivered by electron cyclotron resonance (ECR) ion sources all are produced in the ECR plasma. In order to study such plasmas, high-resolution visible light plasma photographs were taken at ATOMKI source. An 8 megapixel digital camera was used photograph plasmas made from He, methane, N, O, Ne, Ar, Kr, Xe gases and their mixtures. The analysis of photo series gave many qualitative some valuable physical information on nature plasmas. A comparison between...
Multiple frequency heating has been used since the '90 in ECR ion sources as schemes able to improve current intensities especially for highly charged ions. More recently "Two Close Frequency Heating", where gap is comparable with scale-length of resonance, proposed, expected also be sensitive relative waves' phase relationship. At ATOMKI—Debrecen a dedicated experiment carried out exploring effects combined frequencies and their phase-difference an argon plasma. The second was finely tuned...
The research of magnetically confined plasmas with high energy content is nowadays an important branch the plasma physics several options considering chosen technics. One ways detection photons emitted by itself. A new experimental setup was built in ECR Laboratory Atomki (Debrecen, Hungary) to detect 2D dense EM-radiation ECR-plasma. main elements are: ion source (as source, operating at 13.6–14.6 GHz RF pumping frequency) and a pinhole X-ray camera (operating 500 eV–20 keV domain). An...
A numerical tool for analyzing spatially anisotropic electron populations in cyclotron resonance (ECR) plasmas has been developed, using a trial-and-error energy distribution function (EEDF) fitting method. The method was tested on space-resolved warm electrons the range 2–20 keV, obtained from self-consistent simulations modeling only dynamics ECR devices, but lacked real-world validation. For experimentally benchmarking method, we attempted to use EEDF numerically reproduce experimental...
The use of mid-infrared spectroscopy to characterise the chemistry icy interstellar and Solar System environments will be exploited in near future better understand chemical processes molecular inventories various astronomical environments. This is, part, due observational work made possible by recently launched James Webb Space Telescope as well forthcoming missions outer that observe spectroscopic region (e.g., Jupiter Icy Moons Explorer Europa Clipper missions). However, such...
Laboratory experiments have confirmed that the radiolytic decay rate of astrochemical ice analogues is dependent upon solid phase target ice, with some crystalline molecular ices being more radio-resistant than their amorphous counterparts. The degree radio-resistance exhibited by phases nature, strength, and extent intermolecular interactions characterise structure. For example, it has been shown CH3OH decays at a significantly slower when irradiated 2 keV electrons 20 K does due to...
While the mechanism is still not fully clear, beneficial effect (higher intensity of highly charged ions, stable plasma conditions) second microwave injected to ECR was observed in many laboratories, both with close and far frequencies. Due complexity phenomena (e.g. interaction resonant zones, damped instabilities) complex diagnostic methods are demanded understand its better exploit potential hidden it. It a challenging task since diagnostics require arsenal tools be installed relatively...
Imaging of the electron cyclotron resonance (ECR) plasmas by using CCD camera in combination with a pinhole is non-destructive diagnostics method to record strongly inhomogeneous spatial density distribution X-ray emitted plasma and chamber walls. This can provide information on location collisions between warm electrons multiple charged ions/atoms, opening possibility investigate direct effect ion source tuning parameters structure. The first successful experiment was carried out Atomki ECR...
Though the antibacterial effect is advantageous, silver and nanoparticles can negatively affect viability of human tissues. This study aims to check cells on surfaces with different particle size find biologically optimal configuration. We investigated modified thickness vaporized applied heat time physical characteristics nanoparticle covered titanium surfaces. Samples were examined by scanning electron microscopy, mass spectrometry, drop shape analyzer. To investigate how surface influence...