A5101922879- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Mass Spectrometry Techniques and Applications
- Laser-induced spectroscopy and plasma
- Plasma Diagnostics and Applications
- Spectroscopy and Laser Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Muon and positron interactions and applications
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Laser Design and Applications
- Magnetic confinement fusion research
- Advanced Materials Characterization Techniques
- Nuclear Physics and Applications
- Advanced Fiber Optic Sensors
- Ion-surface interactions and analysis
- Atomic and Subatomic Physics Research
- Laser-Matter Interactions and Applications
- Quantum chaos and dynamical systems
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Electron Microscopy Techniques and Applications
- Adhesion, Friction, and Surface Interactions
- Diamond and Carbon-based Materials Research
- Nuclear Materials and Properties
Korea Atomic Energy Research Institute
2014-2024
Korea Advanced Institute of Science and Technology
1999-2018
Columbia University
2011
This paper presents an overview of the current status Virtual Atomic and Molecular Data Centre (VAMDC) e-infrastructure, including VAMDC-connected (or to be connected) databases, updates on latest technological development within infrastructure a presentation some application tools that make use VAMDC e-infrastructure. We analyse past 10 years operation, assess their impact both field atomic molecular (A&M) physics itself heterogeneous data management in international cooperation. The...
Abstract Measuring the in situ erosion rate of tungsten using an optical emission spectroscopic diagnostic technique, so called S/XB method, has recently gained attention current fusion research. This method calculates by multiplying value, which represents ionization per photon emission, with intensity specific spectral line. The value was given rates (S) and excitation (X) from ground metastable levels branching ratio (B) for radiative transition neutral (W I), assuming a corona...
We have calculated cross sections for electron impact ionization (EII) of P-like Fe${}^{11+}$ forming Si-like Fe${}^{12+}$. used the flexible atomic code (FAC) and a distorted-wave (DW) approximation. Particular attention has been paid to through $3l\ensuremath{\rightarrow}n{l}^{\ensuremath{'}}$ $2l\ensuremath{\rightarrow}n{l}^{\ensuremath{'}}$ excitation autoionization (EA) channels. compare our results previously published FAC DW recent experimental results. find that previous discrepancy...
We have developed a laser isotope separation technology for the production of 168Yb and 176Yb isotopes. is very useful generation non destructive testing source, 169Yb. can be used to produce 177Lu which known promising radioisotope medical application. For these applications, abundances isotopes should enriched more than 15% 97%, respectively. Our system consists three dye lasers pumped by diode-pumped solid-state laser, Yb evaporator, photo-ion extractor. Up now, we could enrich 31% with...
The partial and total photoionization cross sections of the Mg-like S${}^{4+}$ ion for ground $3{s}^{2}$ ${}^{1}{S}^{e}$ excited $3s3p$ ${}^{3}{P}^{o}$ ${}^{1}{P}^{o}$ initial states, leaving residual S${}^{5+}$ 3$l$ have been calculated in both dipole length velocity forms using a noniterative eigenchannel $R$-matrix method combined with multichannel quantum-defect theory at surface. Noticeable features are found autoionizing Rydberg series converging to thresholds, owing effect interlopers...
We have calculated electron-impact ionization (EII) for P-like systems from P to Zn15 + forming Si-like ions. The work was performed using the flexible atomic code (FAC) which is based on a distorted-wave approximation. All 3ℓ → nℓ' (n = 3–35) excitation-autoionization (EA) channels near 3p direct threshold and 2ℓ 3–10) EA at higher energies are included. Close attention has been paid detailed branching ratios. Our total EII cross sections compared both with previous FAC calculations,...
An optical emission spectroscopy (OES) technique combined with a collisional-radiative (CR) model is developed for measuring the electron temperature and density of low helium (He) plasma. The CR modeling self-consistently solves steady state population balance equation, including nonlinear radiation trapping heavy particle collisional ionization as well linear electron-impact processes metastable diffusion. considers both Maxwellian non-Maxwellian energy distributions, gas parameter needed...
Using a noniterative eigenchannel R-matrix method, we have studied the photoionization for ground 1S and excited 3, 1P initial states of Be-like N3 + Ne6 ions, up to energy range final photo-ionic 3d state. The autoionizing resonance structures arising from are identified characterized. Our calculated cross sections with excellent agreement between length velocity gauges compared available experimental previous theoretical results, good is shown. For isoelectronic sequences Z ⩽ 10,...
Dielectronic recombination (DR) of Na-like Fe${}^{15+}$ forming Mg-like Fe${}^{14+}$ via excitation a $2l$ core electron has been investigated. We find that configuration interaction (CI) between DR resonances with different captured principal quantum numbers $n$ can lead to significant reduction in resonance strengths for $n\ensuremath{\geqslant}5$. Previous theoretical work this system not considered form CI. Including it accounts most the discrepancy previous and experimental results.
Abstract A plasma beam irradiation facility was developed based on the applied-field magnetoplasmadynamic (AF-MPD) thruster concept for studying plasma-surface interactions. The AF-MPD chosen because it can produce a with high density in continuous-wave mode. Two types of were and used this study: type I source wide channel heat flux test Ar or Xe gas, while II narrow an ion H 2 He gas. initially showed characteristics abnormal glow discharges then transition to arc occurred when current...
We performed high-resolution spectroscopy of Sm I in the near-UV transitions by using an extended-cavity violet diode laser. By adopting traditional Doppler-free saturated-absorption spectroscopy, we made accurate measurements isotope shifts for I. For atomic excitation laser used that was operated wavelength range 398–400 nm. As experimental results, spectra 399.002- and 399.102-nm transition lines were obtained between even-mass isotopes measured first time to our knowledge. Additionally,...
Theoretical dielectronic recombination (DR) rate coefficient calculations can be sensitive to configuration interaction (CI) between resonances with different captured electron principle quantum numbers n. Here we explore the importance of this multi-n CI process for DR via 2l → 3l' core excitations and its effect on total coefficient. Results are presented selected Na-like ions from Ca9 + Zn19 +. We find that including reduce by up ∼10% at temperatures where an ion is predicted form in...