Recovery of vacuum condition and plasma performance after vessel vent in EAST tokamak

Vacuum ◽  
2021 ◽  
Vol 183 ◽  
pp. 109854
Author(s):  
Wang Junru ◽  
Hu Jiansheng ◽  
Yu Yaowei ◽  
Cao Bin
Keyword(s):  
Vacuum Condition

scholarly journals Decomposition of Oil Shale by Electron-Beam Irradiation at Vacuum Condition

2013 ◽  
Vol 25 (17) ◽  
pp. 9465-9467
Author(s):  
W.J. Zhang ◽  
Y.H. Liu ◽  
D. Wang ◽  
X.X. Xin
Keyword(s):  
Electron Beam ◽  
Oil Shale ◽  
Electron Beam Irradiation ◽  
Vacuum Condition ◽  
Beam Irradiation

scholarly journals Electromicrowave device of microwave plasma thruster operating under vacuum condition and its experiment

2004 ◽  
Vol 53 (12) ◽  
pp. 4282
Author(s):  
Yang Juan ◽  
Mao Gen－Wang ◽  
He Hong－Qing ◽  
Tang Jin－Lan ◽  
Song Jun ◽  
...  
Keyword(s):  
Microwave Plasma ◽  
Vacuum Condition ◽  
Microwave Device ◽  
Plasma Thruster

Investigation on the Origin of Al2 O3 -Rich Inclusions in Valve Spring Steel under Vacuum Condition

2016 ◽  
Vol 88 (7) ◽  
pp. 1600376 ◽  
Author(s):  
Liangjun Chen ◽  
Weiqing Chen ◽  
Yang Hu ◽  
Zhaoping Chen ◽  
Yingtie Xu ◽  
...  
Keyword(s):  
Spring Steel ◽  
Vacuum Condition ◽  
Valve Spring

Production of Primary Magnesium by the Aluminothermic Reduction of Magnesia Extracted from Dolomite Ore

2014 ◽  
Vol 788 ◽  
pp. 28-33
Author(s):  
Peng Deng ◽  
Yu Qin Liu ◽  
Wen Gui Yao ◽  
Hong Wen Ma
Keyword(s):  
Calcium Carbonate ◽  
Magnesium Oxide ◽  
Vacuum Condition ◽  
Reduction Ratio ◽  
Raw Material ◽  
Aluminothermic Reduction ◽  
Molar Ratio ◽  
New Process

In this paper, a new process for the production of the primary magnesium is introduced using the dolomite as the raw material. The magnesia and calcium carbonate were prepared from dolomite by acidification. The content of magnesium oxide can reach 98.92% about the magnesia obtained. The magnesia is used to produce primary magnesium by aluminothermic reduction under vacuum condition. The reduction ratio of MgO can be up to 86.14% under the temperature of 1200°C for 5hrs, briquetting pressure of 10MPa and the molar ratio of MgO to Al of 3:2. The content of magnesium is more than 99.90%. The major phases in the briquette residue are corundum and spinel, which can be used as refractory.

Laser-Triggered Surface Flashover Characteristics of Al2O3 in Pulsed Voltage

2011 ◽  
Vol 354-355 ◽  
pp. 1224-1227
Author(s):  
Ru Zheng Pan ◽  
You Hua Wang ◽  
Min Tang Li ◽  
Ling Ling Pang ◽  
Jue Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Nd:Yag Laser ◽  
Delay Time ◽  
Laser Energy ◽  
Test System ◽  
Vacuum Condition ◽  
Surface Flashover ◽  
532 Nm ◽  
Time Decrease ◽  
Pulsed Voltage

Based on the platform of laser-triggered surface flashover in pulsed voltage, experiment of laser-triggered surface flashover is carried out in air and vacuum condition with pulsed voltage. A single/double harmonic, with wavelength of 1064/532 nm, Q-switched Nd:YAG laser is applied to trigger the surface flashover. The test system consists of flat electrodes and columned insulator. The material of electrode is copper and the material of insulator is Al2O3. Laser pulse’s wavelengths are 532nm and 1064nm, and laser is focused with rectangle. The results of experiment show that flashover delay time and jitter time decrease with increase of pulsed voltage or laser energy density, the delay time of 1064nm laser trigger is larger than that of 532nm laser trigger, and the delay time and jitter time in vacuum condition are less than the delay time and jitter time in air condition.

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