A5043138580- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Electrohydrodynamics and Fluid Dynamics
- Plasma Diagnostics and Applications
- Spectroscopy and Laser Applications
- Ion-surface interactions and analysis
- Spectroscopy and Quantum Chemical Studies
- Atmospheric Ozone and Climate
- Laser-induced spectroscopy and plasma
- High Altitude and Hypoxia
- Cardiovascular Effects of Exercise
- Foreign Body Medical Cases
- Ionosphere and magnetosphere dynamics
- Tracheal and airway disorders
- Airway Management and Intubation Techniques
- Esophageal and GI Pathology
- Ionic liquids properties and applications
- Travel-related health issues
- Neuroscience of respiration and sleep
- Microfluidic and Capillary Electrophoresis Applications
- Heart Rate Variability and Autonomic Control
- Trauma Management and Diagnosis
- Atmospheric chemistry and aerosols
- Appendicitis Diagnosis and Management
Taipei Medical University
2011-2025
Wan Fang Hospital
2009-2025
Mackay Memorial Hospital
2015-2024
Mackay Medical College
2018-2024
Busek (United States)
2012-2022
National Yang Ming Chiao Tung University
2007-2016
National Taiwan University
2016
Taipei Veterans General Hospital
2007-2016
Taipei Medical University Hospital
2016
National Taiwan University Hospital
2016
Charge exchange between xenon ions and atoms is the source of a detrimental low energy plasma in vicinity electrostatic spacecraft thrusters. Proper modeling charge-exchange induced interactions requires knowledge respective cross sections. Guided-ion beam measurements semiclassical calculations are presented for atom collisions with Xe+ Xe2+ at energies per ion charge ranging from 1 to 300 eV. The present symmetric Xe++Xe system good agreement several earlier experimental studies based on...
The energetics, interfacial properties, instabilities, and fragmentation patterns of electrosprays made from formamide salt solutions are investigated in a mass spectrometric vacuum electrospray experiment using molecular dynamics (MD) simulations. source is operated Taylor cone-jet mode, with the nanojet that forms being characterized by high surface-normal electric field strengths vicinity 1 V/nm. Mass-to-charge ratios were determined for both positive negative currents sprayed...
This paper presents a set of xenon apparent emission excitation cross sections for lines that have diagnostic value in the analysis Xe-propelled Hall thruster plasmas. Emission are presented three processes involving ground-state atoms: e−+Xe, Xe++Xe, and Xe2++Xe. The derived from luminescence spectra produced at single-collision conditions. Apparent tabulated 12 visible 8 near-infrared electron energies ranging 10to70eV. In case lines, radiation trapping effects accounted by measuring...
A collisional radiative model is presented for analyzing the xenon-propelled Hall thruster optical radiation based on apparent electron and ion-impact emission cross sections associated with lines in visible near-infrared region of spectrum. The selected are incorporated a collisional-radiative model. effect stepwise excitation via metastable states derived line intensities emissions from XeI 5p56p(6p′) levels evaluated. Meanwhile, XeII shown to provide plasma densities at high temperature...
Abstract Background Vortioxetine, a newer serotonergic antidepressant, has been used to treat adult depressive patients. It reported enhance cognitive functions in While the precise mechanism of action remains unknown, it’ s believed share similarities with selective serotonin reuptake inhibitors (SSRIs). Since previous studies have indicated that SSRIs could alter gut microbial composition, and considering correlation between severity function microbiota through gut-brain axis, we aimed...
Retarding potential, time-of-flight (TOF), and quadrupole mass spectrometric methods are applied to study the charged species emitted from a colloid thruster operated in cone-jet mode at high-specific-impulse operating conditions. Measurements conducted for two propellants, 28.4 wt% NaI/formamide electrolyte solution ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]). When volume flow rate of 2‐6 × 10 −14 m 3 /s positive polarity, yields an average specific charge, q/m...
Mestastable Xe atoms play an important role in the collisional radiative processes of dense xenon plasmas, including those electric thrusters for space vehicles. Recent measurements and calculations electron-excitation out 5p56s J = 2 metastable state (1s5 Paschen notation) have allowed development a model near-infrared (NIR) emissions based on population level through 2p?1s5 transitions, depopulation electron-impact excitation. A modified plasma incorporating newly computed excitation cross...
Atomistic molecular dynamics simulations of small clusters and nanodroplets the ionic liquid 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide [EMIM-Tf2N] subject to an external electric field were performed. A 125-ion-pair droplet was found be nearly spherical with isotropic distribution cations anions under vacuum conditions. The subjected fields varying strength, ion emission events observed. initially is elongated along axis, resulting in nonspherical behavior increased net...
The endothermic proton transfer reaction, H2+(v+,N+=1)+Ne→NeH++H(ΔH=0.54 eV), is investigated over a broad range of reactant vibrational energies using the pulsed-field ionization–photoelectron–secondary ion coincidence (PFI–PESICO) scheme. For lowest levels, v+=0 and 1, detailed translational energy dependence also presented continuous approach for preparing ions with monochromatic VUV. Sharp threshold onsets are observed, suggesting importance long-lived intermediates or resonances. At...
The endothermic proton transfer reaction, H2+(υ+)+He→HeH++H(ΔE=0.806eV), is investigated over a broad range of reactant vibrational levels using high-resolution vacuum ultraviolet to prepare ions either through excitation autoionization resonances, or the pulsed-field ionization-photoelectron-secondary ion coincidence (PFI-PESICO) approach. In former case, translational energy dependence integral reaction cross sections are measured for υ+=0–3 with high signal-to-noise guided-ion beam...
This paper presents the methodology to generate beams of ions in single quantum states for bimolecular ion-molecule reaction dynamics studies using pulsed field ionization (PFI) atoms or molecules high-n Rydberg produced by vacuum ultraviolet (VUV) synchrotron laser photoexcitation. Employing pseudocontinuum high-resolution VUV radiation at Advanced Light Source as photoionization source, PFI photoions (PFI-PIs) selected rovibrational have been generated a fast-ion gate pass PFI-PIs fixed...
By employing an electric field pulsing scheme for vacuum ultraviolet laser pulsed ionization-photoion (PFI-PI) measurements, we have been able to prepare a rovibrationally selected PFI-PI beam of N(2)(+)(v(+) = 1, N(+)) with not only high intensity and quantum state purity, but also kinetic energy resolution, allowing absolute total cross sections [σ(v(+) N(+))] the N(2)(+)(X; v(+) + Ar, N(+) 0-8 charge transfer reaction be measured at center-of-mass collision energies (E(cm)) down thermal...
Charge transfer and S-atom have been studied for reaction of both charge states the [C2H2:OCS]+ system. Reactions as a function six different modes reactant nuclear motion, including relative motion nine levels five vibrational two ions. Integral cross section measurements provide information on how total reactivity product branching are affected by forms excitation. Detailed insight into mechanism is obtained from differential scattering measurements—the first ever mode-selectively excited...
Energetic xenon ion collisions with neutral atoms play an important role in electric thruster plasma radiation at low electron temperatures.The respective emission excitation cross sections are necessary for the derivation of parameters from observed radiance.We present apparent near-infrared 5p 5 6p to 6s transitions impacted by singly and doubly charged ions.The were measured over a laboratory energy-per-charge-number range 100 900 eV, that covers typical Hall effect discharge voltages.The...
We report on the development of a software tool, Electrospray Propulsion Engineering Toolkit (ESPET), that is currently being shared as web application with purpose to accelerate electrospray thruster arrays for space propulsion. ESPET can be regarded database microfluidic properties and electrohydrodynamic scaling models are combined into performance estimation tool. The multiscale model integrates experimental high-level physics characterization components in full-scale propulsion (ESP)...
Emission-excitation cross sections for collision processes relevant to krypton-propelled Hall effect and ion thrusters are measured using optical emission spectroscopy in the 350–1000 nm spectral range. Absolute radiances were recorded collisions between beams of krypton ions (either singly or doubly charged) electrons with a Kr gas at charged particle energies electrostatic thruster plasmas. The most prominent emissions observed near-infrared region from low-lying excited electronic state...