Discharge channel development of microsecond tungsten wire explosion in air

2019 ◽  
Vol 26 (2) ◽  
pp. 023501 ◽  
Author(s):  
Qiaojue Liu ◽  
Weibo Yao ◽  
Yu Wang ◽  
Zhan Zhao ◽  
Yongmin Zhang ◽  
...  
Keyword(s):  
Tungsten Wire ◽  
Discharge Channel ◽  
Wire Explosion ◽  
Channel Development

Distribution of Conducting and Nonconducting Matter in the Discharge Channel upon Wire Explosion

2011 ◽  
Vol 59 (6(1)) ◽  
pp. 3472-3475 ◽  
Author(s):  
Svetlana Tkachenko ◽  
Talat Khattatov ◽  
Vladimir Gasilov ◽  
Olga Olhovskaya ◽  
Albert Mingaleev ◽  
...  
Keyword(s):  
Discharge Channel ◽  
Wire Explosion

Distribution of matter in the current-carrying plasma and dense core of the discharge channel formed upon electrical wire explosion

2009 ◽  
Vol 35 (9) ◽  
pp. 734-753 ◽  
Author(s):  
S. I. Tkachenko ◽  
A. R. Mingaleev ◽  
V. M. Romanova ◽  
A. E. Ter-Oganes’yan ◽  
T. A. Shelkovenko ◽  
...  
Keyword(s):  
Discharge Channel ◽  
Dense Core ◽  
Wire Explosion ◽  
Electrical Wire ◽  
Electrical Wire Explosion

Point-Cathode Electron Gun Using Electron-Beam Bombardment for Cathode Tip Heating

1990 ◽  
Vol 48 (1) ◽  
pp. 198-199
Author(s):  
Ryo Iiyoshi ◽  
Susumu Maruse ◽  
Hideo Takematsu
Keyword(s):  
Electron Beam ◽  
Tungsten Wire ◽  
Local Heating ◽  
Electron Gun ◽  
Original Position ◽  
Beam Power ◽  
Radius Of Curvature ◽  
High Brightness ◽  
Beam Focusing ◽  
Time Operation

Point cathode electron gun with high brightness and long cathode life has been developed. In this gun, a straightened tungsten wire is used as the point cathode, and the tip is locally heated to higher temperatures by electron beam bombardment. The high brightness operation and some findings on the local heating are presented.Gun construction is shown in Fig.l. Small heater assembly (annular electron gun: 5 keV, 1 mA) is set inside the Wehnelt electrode. The heater provides a disk-shaped bombarding electron beam focusing onto the cathode tip. The cathode is the tungsten wire of 0.1 mm in diameter. The tip temperature is raised to the melting point (3,650 K) at the beam power of 5 W, without any serious problem of secondary electrons for the gun operation. Figure 2 shows the cathode after a long time operation at high temperatures, or high brightnesses. Evaporation occurs at the tip, and the tip part retains a conical shape. The cathode can be used for a long period of time. The tip apex keeps the radius of curvature of 0.4 μm at 3,000 K and 0.3 μm at 3,200 K. The gun provides the stable beam up to the brightness of 6.4×106 A/cm2sr (3,150 K) at the accelerating voltage of 50 kV. At 3.4×l06 A/cm2sr (3,040 K), the tip recedes at a slow rate (26 μm/h), so that the effect can be offset by adjusting the Wehnelt bias voltage. The tip temperature is decreased as the tip moves out from the original position, but it can be kept at constant by increasing the bombarding beam power. This way of operation is possible for 10 h. A stepwise movement of the cathode is enough for the subsequent operation. Higher brightness operations with the rapid receding rates of the tip may be improved by a continuous movement of the wire cathode during the operations. Figure 3 shows the relation between the beam brightness, the tip receding rate by evaporation (αis the half-angle of the tip cone), and the cathode life per unit length, as a function of the cathode temperature. The working life of the point cathode is greatly improved by the local heating.

Last Progress in Underwater Electrical Wire Explosion

2008 ◽  
Vol 128 (1) ◽  
pp. 31-36
Author(s):  
Alon Grinenko ◽  
Arkady Sayapin ◽  
Sergey Efimov ◽  
Alexander Fedotov ◽  
Yakov E. Krasik
Keyword(s):  
Wire Explosion ◽  
Electrical Wire ◽  
Electrical Wire Explosion

scholarly journals Lateral instability in a discharge channel

2021 ◽  
Vol 147 ◽  
pp. 111001
Author(s):  
M. Arrayás ◽  
M.A. Fontelos
Keyword(s):  
Discharge Channel ◽  
Lateral Instability

Enhancement of hydrogen generation using nanoaluminum particles produced by a wire explosion process

2019 ◽  
Vol 14 (6) ◽  
pp. 810-818
Author(s):  
Neelmani ◽  
Jayaganthan Rengaswamy ◽  
Chakravarthi Satyanarayanan Raghuraman ◽  
Suematsu Hisayuki ◽  
Sarathi Ramanujam
Keyword(s):  
Hydrogen Generation ◽  
Wire Explosion ◽  
Explosion Process
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