scholarly journals Experimental Studies of the Electrical Nonlinear Bimodal Transmission Line

2018 ◽  
Author(s):  
Abdou Karim Farota ◽  
Mouhamadou Mansour Faye ◽  
Bouya Diop ◽  
Diène Ndiaye ◽  
Mary Teuw Niane
Keyword(s):  
Transmission Line ◽  
Experimental Studies

Experimental studies of current-loss characteristics for coaxial magnetically-insulated-transmission line

2013 ◽  
Vol 25 (5) ◽  
pp. 1298-1302
Author(s):  
呼义翔 Hu Yixiang ◽  
黄涛 Huang Tao ◽  
曾正中 Zeng Zhengzhong ◽  
韩娟娟 Han Juanjuan ◽  
曾江涛 Zeng Jiangtao ◽  
...  
Keyword(s):  
Transmission Line ◽  
Experimental Studies ◽  
Current Loss

Calculations and experimental investigation of pulse transmission system in the typical module of the facility “Gamma”

2014 ◽  
Vol 32 ◽  
pp. 1460336 ◽  
Author(s):  
N. V. Zavyalov ◽  
V. T. Punin ◽  
V. S. Gordeev ◽  
A. V. Grishin ◽  
S. T. Nazarenko ◽  
...  
Keyword(s):  
Transmission Line ◽  
Experimental Studies ◽  
Transmission System ◽  
Experimental Sample ◽  
Charge Voltage ◽  
Total Electron ◽  
Pulse Transmission ◽  
Total Electron Energy ◽  
Output Module ◽  
The Given

For the last few years in INRP RFNC-VNIIEF the works on development of a multi-module «Gamma» facility have been conducted. An important part of each module is a pulse transmission system (PTS), providing transportation of a high-volt electromagnetic pulse (~2.3 MV, ~60 ns) to a diode load, positioned at an angle of ~80° to the axis of a module's forming system. Basic PTS units: a water-insulated transmission line (WTL), having a bended section, a vacuum insulator stack and a magnetically-insulated transmission line (MITL). At the first stage an experimental sample of PTS with diameter 0.65 m was studied. Performed studies allowed a conclusion that the given experimental PTS sample did not possess enough electric strength, what was a reason for electric breakdowns in the bended section of WTL. Reasons for breakdown occurrence were analyzed; conclusions were made on the necessity for increasing PTS diameter. As a result a PTS version with diameter ~1 m was developed. This paper presents results of the experimental studies as a part of the facility module. Totally 200 shots of the module were performed with given PTS at different charge voltage of its forming lines. Reliable and steady operation of all PTS units, as well as correspondence between output module parameters and their calculated values were proved. When using PTS, without MITL in the module diode load, with impedance ~3 Ohm the pulses with power 1.5 TW and total electron energy in a pulse ~80 kJ were obtained. When using PTS with cylindrical MITL of 1.6 m length, the pulse power was ~1.4 TW.

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

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