Electrochemical Formation of Laminar Deposits of Controlled Structure and Composition: I . Single Current Pulse Galvanostatic Technique

1987 ◽  
Vol 134 (12) ◽  
pp. 3004-3011 ◽  
Author(s):  
A. R. Despić ◽  
V. D. Jović
Keyword(s):  
Current Pulse ◽  
Controlled Structure ◽  
Composition I ◽  
Single Current Pulse

Control of magnetic vortex core switching in a Pac-man disk using a single current pulse

2014 ◽  
Vol 7 (7) ◽  
pp. 073003 ◽  
Author(s):  
Tomonori Sato ◽  
Keisuke Yamada ◽  
Yoshinobu Nakatani
Keyword(s):  
Current Pulse ◽  
Vortex Core ◽  
Magnetic Vortex ◽  
Single Current Pulse

Energy Model of Neuron Activation

2017 ◽  
Vol 29 (2) ◽  
pp. 502-518 ◽  
Author(s):  
Yuriy Romanyshyn ◽  
Andriy Smerdov ◽  
Svitlana Petrytska
Keyword(s):  
Frequency Response ◽  
Current Pulse ◽  
Energy Model ◽  
Activation Model ◽  
Energy Constraint ◽  
First Order ◽  
Amplitude Frequency Response ◽  
Neuron Activation ◽  
Threshold Amplitude ◽  
Single Current Pulse

On the basis of the neurophysiological strength-duration (amplitude-duration) curve of neuron activation (which relates the threshold amplitude of a rectangular current pulse of neuron activation to the pulse duration), as well as with the use of activation energy constraint (the threshold curve corresponds to the energy threshold of neuron activation by a rectangular current pulse), an energy model of neuron activation by a single current pulse has been constructed. The constructed model of activation, which determines its spectral properties, is a bandpass filter. Under the condition of minimum-phase feature of the neuron activation model, on the basis of Hilbert transform, the possibilities of phase-frequency response calculation from its amplitude-frequency response have been considered. Approximation to the amplitude-frequency response by the response of the Butterworth filter of the first order, as well as obtaining the pulse response corresponding to this approximation, give us the possibility of analyzing the efficiency of activating current pulses of various shapes, including analysis in accordance with the energy constraint.

scholarly journals Формирование двух импульсов тока пучка убегающих электронов

2021 ◽  
Vol 91 (4) ◽  
pp. 589
Author(s):  
Д.В. Белоплотов ◽  
В.Ф. Тарасенко ◽  
Д.А. Сорокин ◽  
В.А. Шкляев
Keyword(s):  
Current Pulse ◽  
Runaway Electron ◽  
Electron Beams ◽  
Runaway Electron Beam ◽  
Runaway Electrons ◽  
Optimal Conditions ◽  
Current Pulse Duration ◽  
Current Pulses ◽  
Second Mode ◽  
Single Current Pulse

The conditions for the formation of two current pulses of runaway electron beams during the breakdown of a point-to-plane and tube-to-plane gaps in high-pressure air, nitrogen, and helium are studied. It has been shown experimentally that, depending on a pressure and kind of gas, a rise time of voltage pulse with an amplitude of tens of kilovolts, three modes of generation of runaway electron beams are observed. In the first mode, a single current pulse of runaway electron beam is observed at the maximum voltage across the gap, when a streamer appears in the vicinity of the pointed electrode (cathode). Its duration is ≈100 ps. In the second mode, two current pulses of runaway electron beams are observed at a lower pressure. The first pulse is generated as in the first mode. The second pulse is generated after the gap is bridged by the streamer (the first ionization wave). The electron energy in the second pulse is significantly less than in the first one, but the duration and amplitude of second current pulse under optimal conditions are greater. The third mode is implemented at lower pressures than in the second one. The generation of runaway electrons continues after the first pulse without a pause in the quasi-stationary stage. The total current pulse duration is hundreds of picoseconds.

Sign in / Sign up

Export Citation Format

Share Document