State Key Laboratory of Intense Pulsed Radiation Simulation and Effect

Fengcheng, China

State Key Laboratory of Intense Pulsed Radiation Simulation and Effect

Fengcheng, China
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Fan G.,Xi'an Jiaotong University | Fan G.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Shi H.,Xi'an Jiaotong University | Weixi L.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Yanzhao X.,Xi'an Jiaotong University
ICEMPE 2017 - 1st International Conference on Electrical Materials and Power Equipment | Year: 2017

Cathode material affecting the electrical breakdown time delay and jitter of self-breakdown gas switch has been studied. Experiments have tested the electrical breakdown time delay of four typical cathode materials including stainless steel, brass, W-Cu alloy and graphite under different applied voltage. The gas switch is operated at N2 pressured of 0.1 MPa, in nanosecond pulsed discharge. The breakdown time delay values td of different cathode materials as the function of the experimental ordinal number are presented. The contourgraph has been used to scan the surface morphology of four cathode electrodes. Comparing the breakdown time delay curve with the section morphology of cathode electrode, it has been preliminarily concluded that the breakdown time delay and jitter are potentially relevant to the surface condition, the surface morphology and physical parameters of cathode material. © 2017 IEEE.


Hu Y.,Xi'an Jiaotong University | Hu Y.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Hu Y.,Northwest Institute of Nuclear Technology | Zeng J.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | And 7 more authors.
Review of Scientific Instruments | Year: 2016

Coupled by the Marx of the "JianGuang-I" facility, a high voltage, low time-delay trigger generator was developed. Working principles of this trigger generator and its key issues were described in detail. Structures of this generator were also carefully designed and optimized. Based on the "JianGuang-I" Marx generator, a test stand was established. And a series of experiment tests were carried out to the study performance of this trigger generator. Experiment results show that the output voltage of this trigger generator can be continuously adjusted from 58 kV to 384 kV. The time delay (from the beginning of the Marx-discharging pulse to the time that the output pulse of the trigger generator arises) of this trigger pulse is about 200 ns and its peak time (0%∼100%) is less than 50 ns. Experiment results also indicate that the time-delay jitter of trigger voltages decreases rapidly with the increase in the peak voltage of trigger pulses. When the trigger voltage is higher than 250 kV, the time-delay jitters (the standard deviation) are less than 7.7 ns. © 2016 Author(s).


Yang S.-H.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Li B.-K.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Luo T.-D.,Northwest Institute of Nuclear Technology | Guo M.-A.,Northwest Institute of Nuclear Technology | And 3 more authors.
Guangzi Xuebao/Acta Photonica Sinica | Year: 2017

An ultra-high speed imaging method based on normal CCD sensor was proposed. The light sensitive area of the chip was covered by the mask and turned into storage area.The influence of extra time that CCD charge transfer took was eliminated. So the frame rate of masked CCD could achieve million frames per second. The different types of masks were introduced, and the restoration method of masked images was discussed. The method of strip-hole array mask was used to build the ultra-high speed imaging prototype base on normal CCD, and the performance was verfied by xenon lamp. After the location of mask pixel center and mask direction are both known, the masked images is finally separated and reformed into several low resolution result images. Results show that a performance of 2 million frames per second is achieved and 14 images with a resolution of 79 pixel×79 pixel are got. © 2017, Science Press. All right reserved.


Hu Y.,Xi'an Jiaotong University | Hu Y.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Zeng J.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Jiang X.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | And 4 more authors.
Review of Scientific Instruments | Year: 2017

Malfunctions of the Marx pre-fire or in the event that the main switch does not close were analyzed. Principles of the diverter system for protection of those events were introduced in detail. A 2.6 MV diverter system, consisting of an oil trigger switch and a Marx-coupled trigger generator, was developed. Based on “JianGuang-I” facility, a diverter-system test stand was established. And experiments with 2.3-MV working voltages were carried out to study the performance of this diverter system. Experiment results show that the time delay of this diverter system (from the beginning of the Marx erection to the time that the diverter-switch closes) is about 320 ns and its jitter (standard deviation) is about 8.9 ns. This diverter system has been tested more than 180 shots, and no problem has been encountered yet. © 2017 Author(s).


Cui Z.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Cui Z.,Polytechnic of Milan | Grassi F.,Polytechnic of Milan | Pignari S.A.,Polytechnic of Milan
2016 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2016 | Year: 2016

With the final objective to assure equivalence between radiated and conducted immunity testing to intense electromagnetic pulses, in this work a circuit model of a typical pulsed current injection (PCI) test setup is derived, implemented in SPICE, and validated by measurement. By virtue of such a model, the parameters of the discharge circuit of the pulse generator can be adjusted to compensate the waveform distortion introduced by the injection probe. As proven by an example, the proposed method allows reproducing at the input of the equipment under test a transient disturbance with expected characteristics (i.e., amplitude, rise time, and pulse width). © 2016 IEEE.


Wang B.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Wang B.,Tsinghua University | Zheng S.,Tsinghua University | Wu L.,Tsinghua University | And 5 more authors.
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | Year: 2016

A fiducialization method based on vibrating wire is described dedicated to the problem of locating the magnetic center relative to external fiducials for the small-aperture quadrupoles. The advantage of this method is that the measurement of the wire position, which may be the main error source, is no longer needed. The position of the magnetic center can be directly obtained by measuring the position shift of the magnet fiducials. This method has been validated on small Permanent Magnet Quadrupoles (PMQs). Experiments have confirmed its feasibility of measuring PMQs with good repeatability of about 10 μm, and shown its high sensitivity as well as convenience. © 2015 Elsevier B.V. All rights reserved.


Sun J.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Sun J.,Northwest Institute of Nuclear Technology | Hu Y.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Hu Y.,Northwest Institute of Nuclear Technology | And 5 more authors.
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2015

Electron incident angles have a heavy effect on the energy deposition profile (EDP) in material of the intense pulsed electron beam. The average of electron incident angles must be taken into consideration when carrying out the diagnosis technology research and numerical simulation study, while a widely received method to solve the problem has not yet been presented. This article gives a qualitative analysis on the energy deposition function, which is formed by the energy loss function and energy deposition efficiency function. An average method of electron beam incident angles based on EDP, which is named as EDP average method, is developed, and a qualitative explanation of the electron beam EDP curve is given. The error and applicability of this method are analyzed. M-C tests are designed for comparison with theoretical analysis. The EDP average method has a better performance in calculation of the EDP than the method using arithmetic average directly, especially in the shallow of target material. ©, 2015, Editorial Office of High Power Laser and Particle Beams. All right reserved.


Zhu X.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Wang J.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Wang J.,Xi'an Jiaotong University | Zhang G.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Chen W.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect
Progress in Electromagnetics Research Symposium | Year: 2014

Parallelized finite-difference time-domain (FDTD) method for simulating the near-fields of flat-plate bounded wave electromagnetic pulse (EMP) simulator with distributed terminator and plane source is presented. The effect of some simulator's model-parameters to the vertical electric fields of the test points at the half-height in the simulator is simulated and analyzed.


PubMed | State Key Laboratory of Intense Pulsed Radiation Simulation and Effect and Xi'an Jiaotong University
Type: Journal Article | Journal: The Review of scientific instruments | Year: 2016

Coupled by the Marx of the JianGuang-I facility, a high voltage, low time-delay trigger generator was developed. Working principles of this trigger generator and its key issues were described in detail. Structures of this generator were also carefully designed and optimized. Based on the JianGuang-I Marx generator, a test stand was established. And a series of experiment tests were carried out to the study performance of this trigger generator. Experiment results show that the output voltage of this trigger generator can be continuously adjusted from 58 kV to 384 kV. The time delay (from the beginning of the Marx-discharging pulse to the time that the output pulse of the trigger generator arises) of this trigger pulse is about 200 ns and its peak time (0%100%) is less than 50 ns. Experiment results also indicate that the time-delay jitter of trigger voltages decreases rapidly with the increase in the peak voltage of trigger pulses. When the trigger voltage is higher than 250 kV, the time-delay jitters (the standard deviation) are less than 7.7 ns.


Ruibin L.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Qiang M.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Chao Q.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | Guizhen W.,State Key Laboratory of Intense Pulsed Radiation Simulation and Effect | And 2 more authors.
IPAC 2013: Proceedings of the 4th International Particle Accelerator Conference | Year: 2013

"QiangGuang-I", working at short pulse state, can be used to research the transient radiation effects on electronic devices. The measurement of dose rate is significant for assessing devices' radiation-resistant ability. This paper comprehensively analyzes the originations of uncertainty on dose rate's measurement, such as thermoluminescent dosemeter's linearity degree and response to X-rays energy spectrum, testing instruments' resolution, waveforms' transmission distortion , and positional error; figures out the extended uncertainty. The result shows that the extended uncertainty of dose rate's measurement is less than 20%, which is satisfactory for researching on devices' transient radiation effects, and proves that the method used to measure dose rate is reasonable.

Loading State Key Laboratory of Intense Pulsed Radiation Simulation and Effect collaborators
Loading State Key Laboratory of Intense Pulsed Radiation Simulation and Effect collaborators