A5114357169- Dermatologic Treatments and Research
- Optical Coherence Tomography Applications
- Pulsed Power Technology Applications
- Gyrotron and Vacuum Electronics Research
- Laser Applications in Dentistry and Medicine
- Photoacoustic and Ultrasonic Imaging
- High voltage insulation and dielectric phenomena
- Power Transformer Diagnostics and Insulation
- Electrostatic Discharge in Electronics
- Skin Protection and Aging
- Superconducting Materials and Applications
- Laser-induced spectroscopy and plasma
- Electrohydrodynamics and Fluid Dynamics
- Magnetic Properties and Applications
- Electromagnetic Launch and Propulsion Technology
- Silicon Carbide Semiconductor Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Spacecraft and Cryogenic Technologies
- Microbial Inactivation Methods
- Particle accelerators and beam dynamics
National University of Defense Technology
2020-2024
Xi'an Jiaotong University
2013-2021
State Key Laboratory of Pulsed Power Laser Technology
2020
Thomas Jefferson National Accelerator Facility
2005
Selective photothermolysis is the basic principle for laser treatment of vascular malformations such as port wine stain birthmarks (PWS). During cutaneous surgery, blood inside vessels heated due to selective absorption energy, while surrounding normal tissue spared. As a result, and experience local thermodynamic non-equilibrium condition. Traditionally, PWS process was simulated by discrete-blood-vessel model that simplifies into parallel cylinders buried in multi-layer skin model. In this...
The non-uniform current distribution in high-power thyristors leads to a significant rise local junction temperature (Tlj), potentially threatening the reliability of thyristors. For online monitoring Tlj, novel temperature-sensitive electrical parameter (TSEP) method was proposed based on peak stray gate (ipsg). First, simplified turn-off models for with an amplifying were set up explore variations gate-cathode voltage and transition. Subsequently, theoretical relationship between ipsg Tlj...
Background and Objective Pulsed dye laser (PDL) is a commonly used treatment for Port Wine Stain birthmarks (PWS). However, deeper components of PWS are often resistant to PDL. Deeper penetrating lasers, including the long pulsed Neodymium:Yttrium Aluminum Garnet (Nd:YAG) have been used, but carry greater risk. This study evaluates distinct blood vessel thermal responses visible (595 nm) near infrared (1,064 lasers using animal numerical models. Study Design/Materials Methods Blood vessels...
Pulsed thyristors widely used in pulsed power generators are more easily confronted with damage problems the turn-on process due to insufficient lateral current spreading under short pulses. This study aims explore spatial and temporal characteristics of pulses reveal relationship between external circuit inductive load. Based on experiments a thyristor an amplifying gate emitter shorts, mixed semiconductor device, simulations were carried out compute variation density ten-microsecond pulse....
The breakdown experiments were conducted on the castor oil and Midel 7131 nano-liquids under microsecond pulse. strength of nano-liquid with 1% volume fraction was over 50% higher than its base liquid, while 0.3% 10% liquid. A high viscosity liquid would help increase optimal nano-particles because in a are harder to polymerize. This study proposed new ideas for mechanism nano-modification extended scope nano-modification.
A pulse forming network (PFN) is a significant component, contributing lot to the overall dimension of generators. In order both reduce size PFN and improve output waveform quality, this paper proposes compact low-impedance with rotational symmetry structure. The consists four groups Blumlein units (PFUs) connected in parallel along angular direction, spline curve structure applied each PFU, which achieves higher space utilization rate. theoretical maximum energy density 6.6 J/L as...
The trigger generator made with a spiral (SG) has the advantages of light weight, compact structure, and low cost promising applications in pulsed power field. This paper introduces solid-state high-voltage pulse system based on an improved SG, which repetition rate lowered demands for semiconductor switches’ maximum current rise when compared previous studies. improvement is achieved by winding outward additional layer passive low-voltage metal strip, realizes significant reduction peak...
In liquid mediums, whether the breakdown strength can be greatly improved after introducing nano-particles has been widely investigated, however, there no scientific consensus on modification mechanism of this anomalous phenomenon. paper, we first experimentally measured streamer morphology and in pure transformer oil, TiO2 nano-liquids Al2O3 under microsecond pulse. The results demonstrated that are significant differences between oil nano-liquids, as streamers exhibit thick bush-like...
An innovative six-meter long prototype of the magnetic levitation suspended cryogen transfer line has design, constructed and tested to demo potentials extending many missions by saving cryogens, or reducing overall launch mass accomplish a given mission. The use permanent magnets (PM) high temperature superconductors (HTS) provides support without mechanical contact thus, conduction part heat leak can be reduced zero, which is ultimately most serious after thermal radiation been minimized....