A5032351873- Pulsed Power Technology Applications
- Gyrotron and Vacuum Electronics Research
- Metal and Thin Film Mechanics
- Ion-surface interactions and analysis
- Plasma Diagnostics and Applications
- Diamond and Carbon-based Materials Research
- Laser-induced spectroscopy and plasma
- Laser-Plasma Interactions and Diagnostics
- Plasma Applications and Diagnostics
- Semiconductor materials and devices
- Electrostatic Discharge in Electronics
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Microwave Engineering and Waveguides
- Electrohydrodynamics and Fluid Dynamics
- Electromagnetic Launch and Propulsion Technology
- Laser Design and Applications
- Advanced materials and composites
- GaN-based semiconductor devices and materials
- Boron and Carbon Nanomaterials Research
- Carbon Nanotubes in Composites
- Laser-Matter Interactions and Applications
- Thermal properties of materials
- Silicon Nanostructures and Photoluminescence
- Integrated Circuits and Semiconductor Failure Analysis
Nagaoka University of Technology
2016-2025
Nagaoka University
2016-2025
Hangzhou First People's Hospital
2024
Changzhou University
2019-2023
Jiangsu Provincial Academy of Traditional Chinese Medicine
2023
Xinjiang Medical University
2021-2023
Tumor Hospital of Xinjiang Medical University
2021-2023
Sun Yat-sen University
2023
Cicatelli Associates
2023
Henan Institute of Technology
2023
Power semiconductor devices, such as insulated-gate bipolar transistors, metal-oxide-semiconductor field-effect and static-induction thyristors, are used in different kinds of pulsed power generators developed for applications. In addition, the opening switch is found to have very effective applications generation by inductive energy storage. Semiconductor switches greatly extended scales parameters, especially repetition rate lifetime. They also enabled new areas applications, accelerators,...
We demonstrated spectral control of beyond extreme ultraviolet (B-EUV) emission at a central wavelength 6.76 nm from gadolinium (Gd) laser-produced plasma. The highest purity (SP) was 5.1% under dual 1-μm laser pulse irradiation. It doubled compared to value 2.4% attained single irradiation solid density Gd because the reduction in optical depth. maximum SP higher than that obtained using mid-infrared 10.6 μm. for 150-ps main also 6-ns Our approach can be extended solid-state plasmas (LPPs)...
The pulsed wire discharge, as one of the well-developed power technologies, has been successfully applied to nanosize powder production. In demonstration experiments, discharge was carried out with peak current /spl sim/10 kA, pulse length sim/20 mu/s, and energy sim/80 J. Nanosize powders metals (Al, Fe, Cu, Mo, Pb), metal oxides (Al/sub 2/O/sub 3/, TiO/sub 2/, Fe/sub NiO, ZrO/sub SnO/sub PbO), nitrides (TiN, ZrN, Ta/sub 2/N) have synthesized by wires in argon, oxygen, or nitrogen. typical...
We have demonstrated a laser-produced plasma extreme ultraviolet source operating in the 6.5–6.7 nm region based on rare-earth targets of Gd and Tb coupled with Mo/B4C multilayer mirror. Multiply charged ions produce strong resonance emission lines, which combine to yield an intense unresolved transition array. The spectra these resonant lines around 6.7 (in-band: ±1%) suggest that in-band increases increased volume by suppressing hydrodynamic expansion loss at electron temperature about 50...
A solid-state linear transformer driver stack has been developed to demonstrate pulsed power generation and output pulse shaping. It consists of 30 modules each using 24 metal–oxide–semiconductor field-effect transistors as switches. The voltage the is superposition module no matter if are switched synchronously or not. In synchronous operation, voltages all added up reach an <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...
We demonstrate a table-top broadband emission water window source based on laser-produced high-Z plasmas. Resonance from multiply charged ions merges to produce intense unresolved transition arrays (UTAs) in the 2–4 nm region, extending below carbon K edge (4.37 nm). Arrays resulting n=4-n=4 transitions are overlaid with n=4-n=5 and shift shorter wavelength increasing atomic number. An outline of microscope design for single-shot live cell imaging is proposed bismuth plasma UTA source,...
A copper-catalyzed annulation of O-acyl oximes with cyclic 1,3-diones has been developed for the concise synthesis 7,8-dihydroindolizin-5(6H)-ones and cyclohexanone-fused furans through substituent-controlled selective radical coupling process. 2-Alkyl undergo C-C coupling, while 2-unsubstituted C-O coupling.
A modified configuration of relativistic magnetron with diffraction output has been proposed in order to improve microwave conversion efficiency. In this configuration, the coupling between cavity and cylindrical waveguide is significantly improved. Three-dimensional particle-in-cell simulations using simulation-code MAGIC were carried out demonstrate effectiveness configuration. simulation results, maximum efficiency ∼37% obtained, compared that ∼3% obtained conventional
Pulsed intense ion beams have been developed for applications including surface modification and alloying, thin-film nanopowder synthesis. Rapid thermal processing with ions is quite promising large-scale commercial use, due to the high specific energy deposition (joules per cubic centimeter) without reflection, relative efficiency low cost of pulsed power ion-beam drivers compared other high-kinetic alternatives. We discuss in this paper basis use materials methods beam formation...
We demonstrate an efficient extreme ultraviolet (EUV) source for operation at λ = 6.7 nm by optimizing the optical thickness of gadolinium (Gd) plasmas. Using low initial density Gd targets and dual laser pulse irradiation, we observed a maximum EUV conversion efficiency (CE) 0.54% 0.6% bandwidth (BW) (1.8% 2% BW), which is 1.6 times larger than 0.33% (0.6% BW) CE produced from solid target. Enhancement use low-density plasma attributed to reduction self-absorption effects.
Circular RNA RHOT1 (circRHOT1) plays crucial roles in tumorigenesis by competing with microRNAs. It is largely abundant tumor cell-derived exosomes. Meanwhile, cancer-derived exosomes participate diverse biological processes. However, the expression patterns and functions of exosomal circRHOT1 breast cancer remain unknown. This study aimed to investigate elucidate circRHOT1/miR-204-5p/PRMT5 axis cancer.The derived from serum samples patients cell lines were characterized using transmission...
A new type of virtual cathode oscillator, the coaxial vircator, was studied analytically and experimentally. one-dimensional analytical model used to describe steady-state behavior electron beam cathode, from which diode current, space-charge limited position, estimated oscillation frequency were obtained. The experiments carried out with typical electron-beam parameters 500 kV, 40 kA, 30 ns, where pulsed microwaves 400 MW in peak power 2 GHz have been energy efficiency /spl sim/2%. This is...
A modified configuration of relativistic magnetron with diffraction output has been investigated experimentally by using repetitive pulsed power generator “ETIGO-IV” (400kV, 13kA, 120ns, 1Hz). The purpose is to verify the improved microwave conversion efficiency predicted numerical simulations [M. Daimon and W. Jiang, Appl. Phys. Lett. 91, 191503 (2007)]. experiments have concentrated on comparison between powers obtained conventional configurations magnetron. results in general agreement...
The orientation of hexagonal boron nitride ( BN ) nanosheets was controlled in polymer‐based nanocomposite film using microscopic molds while applying a dc electric field. were dispersed by sonication prepolymer mixture polysiloxane followed high speed mixing. homogeneous suspension cast on mold with different patterns, which attached to positive electrode during application an field before it became cross‐linked. Analysis revealed that filament‐like linear assemblies LABN s) fabricated...
We have demonstrated an efficient extreme ultraviolet (EUV) source at 6.7 nm by irradiating Gd targets with 0.8 and 1.06 μm laser pulses of 140 fs to 10 ns duration. Maximum conversion efficiency 0.4% was observed within a 0.6% bandwidth. A Faraday cup ion yield time flight signals for ions from plasmas generated each laser. Ion kinetic energy lower shorter pulse durations, which yielded higher electron temperatures required EUV emission, due intensity. Picosecond were found be the best...
We characterize extreme ultraviolet (EUV) emission from mid-infrared (mid-IR) laser-produced plasmas (LPPs) of the rare-earth element Gd. The energy conversion efficiency (CE) and spectral purity in mid-IR LPPs at λL = 10.6 μm were higher than for solid-state 1.06 μm, because plasma produced is optically thin due to lower critical density, resulting a CE 0.7%. peak wavelength remained fixed 6.76 nm all laser intensities studied. Plasma parameters intensity 1.3×10(11) W/cm(2) was also...
Bright narrow band emission observed in optically thin plasmas of high-Z elements the extreme ultraviolet spectral region follows a quasi-Moseley's law. The peak wavelength can be expressed as λ=(21.86±12.09)×R∞−1×(Z−(23.23±2.87))−(1.52±0.12), where R∞ is Rydberg constant. varies from 13.5 nm to 4.0 atomic number, Z, increases Z = 50 83. range wavelengths available hot permits development bright laboratory-scale sources for applications including x-ray microscopy and absorption fine...
Pulsed power with a short high-voltage spike followed by relatively long plateau is called spiker-sustainer pulse. It has particular applications in the areas related to gas discharge. This article reports solid-state circuit that consists of pulse-forming network (PFN) and semiconductor opening switch (SOS). Two switching units using multiple MOS-gated thyristors are used as control switches enable charging PFN initiate its discharge load through SOS, respectively. The SOS plays role...