Identification of surface discharge based on discharge current waveform in composite insulation system of LN2 and solid insulator

2008 ◽  
Author(s):  
Y. Tanaka ◽  
E. Nakamura ◽  
Y. Murakami ◽  
S. Yamada ◽  
M. Nagao
Keyword(s):  
Discharge Current ◽  
Surface Discharge ◽  
Current Waveform ◽  
Insulation System ◽  
Solid Insulator

Observation of Partial Discharge Current Waveform under Inverter Surge Application

2012 ◽  
Vol 132 (2) ◽  
pp. 187-191 ◽  
Author(s):  
Yoshinobu Murakami ◽  
Takahiro Takino ◽  
Naohiro Hozumi ◽  
Masayuki Nagao
Keyword(s):  
Discharge Current ◽  
Partial Discharge ◽  
Current Waveform

scholarly journals Delayed Discharge Bridging Two Sputtering Modes from Modulated Pulsed Power Magnetron Sputtering (MPPMS) to Deep Oscillation Magnetron Sputtering (DOMS)

Plasma ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 239-251
Author(s):  
Masaomi Sanekata ◽  
Hiroshi Nishida ◽  
Tatsuya Watabe ◽  
Yuki Nakagomi ◽  
Yoshihiro Hirai ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Discharge Current ◽  
Electrical Breakdown ◽  
Pulsed Power ◽  
Current Waveform ◽  
Delayed Discharge ◽  
Plot Analysis ◽  
Delay Times ◽  
Discharge Behavior ◽  
Delayed Discharges

Delayed discharges due to electrical breakdown are observed in modulated pulsed pow er magnetron sputtering (MPPMS) plasma of titanium. The delayed discharge, which is remarkable with decreasing argon gas pressure, transforms the discharge current waveform from a standard modulated pulsed discharge current waveform to a comb-like discharge current waveform consisting of several pulses with high power. In addition, the delay times, consisting of statistical times and formative times in the delayed MPPMS discharges, are experimentally measured with the help of Laue plot analysis. The pressure dependence of delay times observed indicates that the delayed discharge behavior matches the breakdown characteristics well. In the present study, the delayed discharge dynamics of the comb-like discharge current waveform, which can be the origin of deep oscillation magnetron sputtering, are investigated based on measurement of the delay times and the characteristics of discharge current waveforms.

An Electronic, Adjustable-Waveform Current Generator for Use with a Quarter-Wave Resonant Spark Source

1979 ◽  
Vol 33 (5) ◽  
pp. 463-467 ◽  
Author(s):  
Tsutomu Araki ◽  
John P. Walters
Keyword(s):  
Discharge Current ◽  
Repetition Rate ◽  
Current Waveform ◽  
Current Generator ◽  
Fast Scr ◽  
Quarter Wave ◽  
Ladder Network ◽  
Discharge Chemistry ◽  
Network Functions ◽  
A Current

A newly designed current generator for use with a quarter-wave spark source for a fundamental spectroscopic study of spark discharge chemistry is described. The generator outputs a trapezoidal discharge current waveform whose duration and amplitude are adjustable independently of the source repetition rate up to 5 μsec and 30 A, respectively. A multi-π section LC ladder network and a fast SCR are combined for the new generator to produce the adjustable discharge current waveform, in place of a single RC filter for a conventional current generator. The LC network functions as a current width stretcher and the SCR shapes the pulse into the desired duration by shunt clipping the tail. To evaluate the performance of the new current generator, transient emission waveforms of Cu lines are compared for a trapezoidal current waveform and a simple relaxation discharge waveform with that generated from the conventional generator.

Parametric Study of a Low-Pressure Theta-Pinch Discharge in Argon for Preliminary Analytical Optimization

1989 ◽  
Vol 43 (6) ◽  
pp. 991-997 ◽  
Author(s):  
Jeffrey S. White ◽  
Gae Ho Lee ◽  
Alexander Scheeline
Keyword(s):  
Discharge Current ◽  
Parametric Study ◽  
Low Pressure ◽  
Gas Pressure ◽  
Discharge Energy ◽  
Current Waveform ◽  
Theta Pinch ◽  
Discharge Gas

The qualitative dependence of spectrochemical performance of a thetapinch discharge on a variety of experimental variables including discharge gas pressure, sample positioning, discharge energy, and discharge current waveform is reported.

Discharge characteristics of composite insulation system with floating electrode and solid insulator in vacuum

2016 ◽  
Vol 23 (2) ◽  
pp. 1219-1225 ◽  
Author(s):  
Fei Kong ◽  
Yusuke Nakano ◽  
Hiroki Kojima ◽  
Naoki Hayakawa ◽  
Toshinori Kimura ◽  
...  
Keyword(s):  
Insulation System ◽  
Discharge Characteristics ◽  
Solid Insulator ◽  
Floating Electrode

Developments for High-Speed Analysis of Diverse Ferrous Alloys

1982 ◽  
Vol 36 (5) ◽  
pp. 510-519 ◽  
Author(s):  
D. Neil Washburn ◽  
John P. Walters
Keyword(s):  
High Power ◽  
Discharge Current ◽  
High Speed ◽  
Spectral Lines ◽  
Analysis Time ◽  
Waveform Analysis ◽  
Current Waveform ◽  
Ferrous Alloys ◽  
Background Ratio ◽  
High Speed Analysis

High-power positionally stabilized sparks were used to sample several types of ferrous alloys. The power was increased by sparking at repetition rates up to 1920 sparks/s and peak discharge currents up to 800 A. The signal/background ratios of several spectral lines were measured photographically and photoelectrically, while the power was varied and the number of coulombs held constant. The coulombs were measured by gated integration of the discharge current waveform. Analysis time decreased by a factor of 16 while the signal/background ratio for sample spectral lines decreased by a factor of 2.5.

Human-to-metal electrostatic discharge current measurements – Notes on the ESD current waveform

2015 ◽  
Vol 77 ◽  
pp. 182-190 ◽  
Author(s):  
Pavlos S. Katsivelis ◽  
Ioannis F. Gonos ◽  
Ioannis A. Stathopulos
Keyword(s):  
Discharge Current ◽  
Electrostatic Discharge ◽  
Current Waveform

Observation of partial discharge current waveform under inverter surge application

2009 ◽  
Author(s):  
Takahiro Takincr ◽  
Kenji Nanacr ◽  
Yoshinobu Murakamr ◽  
Naohiro Hozumi ◽  
Masayuki Nagao
Keyword(s):  
Discharge Current ◽  
Partial Discharge ◽  
Current Waveform
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