Some Considerations of the Pulse Power Switch Centered on Thyristor Device

For high energy short pulse discharge applications, like electromagnetic launchers or magnetic forming, mostly the thyristor technology is used. The presented thyristor switch assemblies using 125 mm wafer size are made to switch 62.4MJ stored energy into a load in very short time. The maximum transient peak current of 26 kilo-amperes peak for 20 ms with convection water and air cooling. For this presentation we concentrate on the Thyristor technology as this offer the highest current capability but are not in the position to switch-off any current. Some measures must be used to the pulse switch centered on Thyristor device, i.e., proper selection of the static and dynamic parameters of the thyristor, enough power for triggering the device, and efficient cooling of the device, which can make it possible to produce devices with high blocking voltage combined with very high current handling.

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A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter

Scientific Reports ◽

10.1038/s41598-021-86234-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

J. I. Apiñaniz ◽

S. Malko ◽

R. Fedosejevs ◽

W. Cayzac ◽

X. Vaisseau ◽

...

Keyword(s):

Energy Density ◽

Proton Beam ◽

Dense Matter ◽

High Energy ◽

High Repetition Rate ◽

High Energy Density ◽

Time Duration ◽

Ultrashort Pulse Laser ◽

Proton Source ◽

Short Time

AbstractWe report on the development of a highly directional, narrow energy band, short time duration proton beam operating at high repetition rate. The protons are generated with an ultrashort-pulse laser interacting with a solid target and converted to a pencil-like narrow-band beam using a compact magnet-based energy selector. We experimentally demonstrate the production of a proton beam with an energy of 500 keV and energy spread well below 10$$\% $$ % , and a pulse duration of 260 ps. The energy loss of this beam is measured in a 2 $$\upmu $$ μ m thick solid Mylar target and found to be in good agreement with the theoretical predictions. The short time duration of the proton pulse makes it particularly well suited for applications involving the probing of highly transient plasma states produced in laser-matter interaction experiments. This proton source is particularly relevant for measurements of the proton stopping power in high energy density plasmas and warm dense matter.

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Effect of High-Energy Ball-Milling and TiB2 Content on Microstructures and Properties of Cu-TiB2 Composites Sintered by SPS

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.118.661 ◽

2006 ◽

Vol 118 ◽

pp. 661-665 ◽

Cited By ~ 1

Author(s):

Dae Hwan Kwon ◽

Thuy Dang Nguyen ◽

Pyuck Pa Choi ◽

Ji Soon Kim ◽

Young Soon Kwon

Keyword(s):

Electrical Conductivity ◽

Ball Milling ◽

High Energy ◽

High Energy Ball Milling ◽

Plasma Sintering ◽

Spark Plasma ◽

Energy Ball ◽

Xrd Patterns ◽

Short Time ◽

Tib2 Particles

The microstructure and properties of Cu-TiB2 composites produced by high-energy ball-milling of TiB2 powders and spark-plasma sintering (SPS) were investigated. TiB2 powders were mechanically milled at a rotation speed of 1000rpm for short time in Ar atmosphere, using a planetary ball mill. To produce Cu-xTiB2 composites( x = 2.5, 5, 7.5 and 10wt.% ), the raw and milled TiB2 powders were mixed with Cu powders by means of a turbular mixer, respectively. Sintering of mixed powders was carried out in a SPS facility under vacuum. High-energy ball-milling resulted in refinement of TiB2 particles. XRD patterns of milled TiB2 powders indicated broader TiB2 peaks with decreased intensities. After sintering at 950 for 5min using the raw and milled TiB2 mixture powders, the sintered density decreased with increasing TiB2 content regardless of milling of TiB2. In the case of raw TiB2, hardness rapidly increased from 4 to 44 HRB with increasing TiB2 content. The electrical conductivity changed from 95.5 to 80.7 %IACS. For mixtures of Cu powders with milled TiB2 powders, hardness increased from 38 to 67 HRB as TiB2 content increased, while the electrical conductivity varied from 88% to 51 % IACS. When compared to compacts sintered with raw and milled TiB2 powders, the electrical conductivity of specimens with raw TiB2 powder was higher than that of specimens with milled TiB2 powder, while hardness was slightly lower.

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A comparative study between air cooling and liquid cooling thermal management systems for a high-energy lithium-ion battery module

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2021.117503 ◽

2021 ◽

Vol 198 ◽

pp. 117503 ◽

Cited By ~ 2

Author(s):

Mohsen Akbarzadeh ◽

Theodoros Kalogiannis ◽

Joris Jaguemont ◽

Lu Jin ◽

Hamidreza Behi ◽

...

Keyword(s):

Comparative Study ◽

Lithium Ion Battery ◽

Thermal Management ◽

Lithium Ion ◽

High Energy ◽

Management Systems ◽

Air Cooling ◽

Liquid Cooling ◽

Battery Module

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Energy efficient plasma processing of gaseous emission using a short pulse discharge

Applied Physics Letters ◽

10.1063/1.120338 ◽

1997 ◽

Vol 71 (23) ◽

pp. 3364-3366 ◽

Cited By ~ 61

Author(s):

Victor Puchkarev ◽

Martin Gundersen

Keyword(s):

Energy Efficient ◽

Short Pulse ◽

Pulse Discharge ◽

Plasma Processing ◽

Gaseous Emission

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Versatile High-Energy and Short-Pulse Operation of PHELIX

Springer Proceedings in Physics - X-Ray Lasers 2008 ◽

10.1007/978-1-4020-9924-3_6 ◽

2009 ◽

pp. 53-58 ◽

Cited By ~ 2

Author(s):

T. Kuehl ◽

V. Bagnoud ◽

C. Bruske ◽

S. Borneis ◽

B. Ecker ◽

...

Keyword(s):

Short Pulse ◽

High Energy ◽

Pulse Operation

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UNJUK KERJA REAKTOR PLASMA DIELECTRIC BARRIER DISCHARGE UNTUK PRODUKSI BIODIESEL DARI MINYAK KELAPA SAWIT

Teknik ◽

10.14710/teknik.v34i2.5636 ◽

2013 ◽

Vol 34 (2) ◽

pp. 116

Author(s):

Ardian Dwi Yudhistira ◽

Istadi Istadi

Keyword(s):

Reaction Mechanism ◽

Reaction Time ◽

Product Yield ◽

High Energy ◽

Electrode Gap ◽

Dbd Plasma ◽

Electric Voltage ◽

Batch System ◽

Electro Catalysis ◽

Short Time

Biodiesel is one of alternative renewable energy source to substitute diesel fuel. Various biodiesel productionprocesses through transesterification reaction with a variety of catalysts have been developed by previousresearcher. This process still has the disadvantage of a long reaction time, and high energy need. DielectricBarrier Discharge (DBD) plasma electro-catalysis may become a solution to overcome the drawbacks in theconventional transesterification process. This process only needs a short time reaction and low energy process.The purpose of this study was to assess the performance of DBD plasma rector in making biodiesel such as: theeffect of high voltage electric value, electrodes gap, mole ratio of methanol / oil, and reaction time. TheResearch method was using GC-MS (Gas Cromatography-Mass Spectrofotometry) and FTIR (FourierTransform Infrared Spectrofotometry) and then it will be analysed the change of chemical bond betweenreactant and product. So, the reaction mechanism can be predicted. Biodiesel is produced using methanol andpalm oil as reactants and DBD plasma used as reactor in batch system. Then, reactants contacted by highvoltage electric. From the results of this research can be concluded that the reaction mechanism occurs in theprocess is the reaction mechanism of cracking, the higher of electric voltage and the longer of reaction time leadto increasing of product yield. The more of mole ratio of methanol / oil and widening the gap between theelectrodes lead to decreased product yield. From this research, product yield maksimum is 89,8% in the variableof rasio mol metanol/palm oil 3:1, voltage 10 kV, electrode gap 1,5 cm, and reaction time 30 seconds.

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High-energy X-ray radiography of laser shock loaded metal dynamic fragmentation using high-intensity short-pulse laser

Review of Scientific Instruments ◽

10.1063/1.5034401 ◽

2018 ◽

Vol 89 (11) ◽

pp. 115106 ◽

Cited By ~ 5

Author(s):

Genbai Chu ◽

Tao Xi ◽

Minghai Yu ◽

Wei Fan ◽

Yongqiang Zhao ◽

...

Keyword(s):

Pulse Laser ◽

High Intensity ◽

Short Pulse ◽

High Energy ◽

Laser Shock ◽

X Ray ◽

Dynamic Fragmentation ◽

Short Pulse Laser

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Short pulse, high resolution, backlighters for point projection high-energy radiography at the National Ignition Facility

Physics of Plasmas ◽

10.1063/1.4983137 ◽

2017 ◽

Vol 24 (5) ◽

pp. 053104 ◽

Cited By ~ 20

Author(s):

R. Tommasini ◽

C. Bailey ◽

D. K. Bradley ◽

M. Bowers ◽

H. Chen ◽

...

Keyword(s):

High Resolution ◽

Short Pulse ◽

High Energy ◽

National Ignition Facility ◽

Point Projection

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Aplikasi Pelaporan Kelebihan Jam Mengajar Jurusan Akuntansi PNP

Akuntansi dan Manajemen ◽

10.30630/jam.v15i2.18 ◽

2020 ◽

Vol 15 (2) ◽

pp. 43-49

Author(s):

Sukartini ◽

Firman Surya ◽

Welsi Haslina ◽

Yusnani ◽

Ulfi Maryati

Keyword(s):

Design Method ◽

Application Development ◽

Process Data ◽

Database Application ◽

Microsoft Access ◽

Implementation Stages ◽

The Right ◽

Short Time ◽

To Receive ◽

Selection Of

This study aims to create a database application program that is able to process data on lecturer course activities and generate reports on the calculation of teaching fees periodically during the pandemic which requires lecturers to report lecture activities online. The system design method approach used is prototyping, namely by creating a program that most closely resembles user needs in a relatively short time. The prototype was generated using the Microsoft Access 2010 database application. The selection of microsoft access to create a prototype was based on the availability of complete facilities in Microsoft Access to design table relations, input forms, query processing, reports and the visual basic programming language for applications. Google Forms used to receive lecture data input online. The application development stages consist of design, testing and implementation stages. This application has succeeded in providing the right solution for the Padang State Polytechnic Accounting Department during the pandemic in calculating and reporting lecture activities and lecturers teaching fees.

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