Two-dimensional potential distribution measurement of surface discharge with subnanosecond resolution

Kumada, Akiko; Sugihara, Toshio; Chiba, M.; Hidaka, Kunihiko

doi:10.1063/1.1458042

Cited by 19 publications

(17 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The configurations of the Pockels sensor are classified into transverse and longitudinal ones [5]. The longitudinal one is sensitive to the potential difference between the Pockels crystal, and can be utilized as not only a field sensor but also a voltage sensor [2,3].…”

Section: Basic Principle Of the Pockels Sensormentioning

confidence: 99%

See 1 more Smart Citation

Oscillatory waveform caused by piezoelectric vibration of pockels crystal and its effective suppression

Matsumoto

Matsuoka

Kumada

et al. 2010

IEEJ Transactions Elec Engng

Self Cite

View full text Add to dashboard Cite

In measurements of impulse voltages by Pockels sensors, oscillatory components have been observed in the tail parts of the optical signals. In this paper, oscillatory components of Bi 4 Ge 3 O 12 (BGO) Pockels crystals of various shapes are investigated. The tested BGO crystals are rectangular solids, a cylindrical solid, and a tapered quadratic solid. The oscillatory components are derived from the light outputs and the frequency analysis is performed. The oscillation frequency of the rectangular crystals is lower than the theoretical value and that of a cylinder is the same as that of circumscribed rectangular solid. In the case of the tapered BGO crystal, it is possible to reduce the oscillatory components by distributing piezoelectric vibration over a broad frequency bandwidth. 

show abstract

Section: Basic Principle Of the Pockels Sensormentioning

confidence: 99%

“…Pockels voltage sensors have been widely used in electrical power transmission and distribution systems [1–5]. However, in the measurements of impulse voltages, unexpected oscillatory components have been observed in the tail parts of the optical signals.…”

Section: Introductionmentioning

confidence: 99%

Oscillatory waveform caused by piezoelectric vibration of pockels crystal and its effective suppression

Matsumoto

Matsuoka

Kumada

et al. 2010

IEEJ Transactions Elec Engng

Self Cite

View full text Add to dashboard Cite

show abstract

“…The effectiveness of this principle has been firstly verified by Takada combining with the CCD camera detection [21], [22]. The reported best temporal resolution of this method can reach 0.2 ns at present [23]. Meanwhile, the optical method is the only way to achieve online surface charge measurement [24].…”

Section: Introductionmentioning

confidence: 96%

Explorative Study on a Novel Ellipsometry Detection Method for Space Charge Inside Solid Insulation: Towards High Temporal and Spatial Resolutions

Ren

Gao

et al. 2021

IEEE Sensors J.

View full text Add to dashboard Cite

The resolution performance of space charge measurement method determines its application environment and measured information, which has put forward higher temporal and spatial resolution requirements for the charge evaluation of electronic equipment insulation. Based on the ellipsometry detection principle and the photoelastic effect of the sensor, a novel optical method for space charge measurement is proposed. The potentials of the method in terms of single measurement with high signal-to-noise ratio, terahertz bandwidth and nanometer spatial resolution are analyzed. By deriving the mathematical relationship of the signal transmission, it is indicated that the light intensity difference measured by the system can linearly present the elastic force generated from space charge. Based on the built ellipsometry detection system, it is found that the detected signal from the sensor can quickly track the imposed elastic waves with different amplitudes and frequencies, which verifies the feasibility of the crucial detection part and the fast measurement speed of the proposed method. Further simulation results indicate that the refractivity performance of the sensor under the effect of elastic waves can present the deformation variation with a spatial resolution of 2 nm. Therefore, the given explorative research can provide the key theoretical basis and experimental verification for the proposed method.

show abstract

“…Both is challenging. But advanced non-invasive techniques of measuring surface charges [14], [15] may successfully guide the construction of realistic microscopic models for the plasma wall.…”

Section: Introductionmentioning

confidence: 99%

Plasma Walls Beyond the Perfect Absorber Approximation for Electrons

Bronold

Heinisch

Marbach

et al. 2011

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Abstract-Plasma walls accumulate electrons more efficiently than ions leading to wall potentials which are negative with respect to the plasma potential. Theoretically, walls are usually treated as perfect absorber for electrons and ions implying perfect sticking of the particles to the wall and infinitely long desorption times for particles stuck to the wall. For electrons we question the perfect absorber model and calculate, specifically for a planar dielectric wall, the electron sticking coefficient se and the electron desorption time τe. For the uncharged wall we find se ≪ 1 and τe ≈ 10 −4 s. Thus, in the early stage of the build-up of the wall potential, when the wall is essentially uncharged, the wall is not a perfect absorber for electrons. For the charged wall we find τ −1 e ≈ 0. Thus, τe approaches the perfect absorber value. But se is still only of the order of 10 −1 . Calculating se as a function of the wall potential and combining this expression with the quasi-stationary balance equations for the electron and ion surface densities we find the selfconsistent wall potential, including surface effects, to be 30% of the perfect absorber value.

show abstract

Two-dimensional potential distribution measurement of surface discharge with subnanosecond resolution

Cited by 19 publications

References 11 publications

Oscillatory waveform caused by piezoelectric vibration of pockels crystal and its effective suppression

Oscillatory waveform caused by piezoelectric vibration of pockels crystal and its effective suppression

Explorative Study on a Novel Ellipsometry Detection Method for Space Charge Inside Solid Insulation: Towards High Temporal and Spatial Resolutions

Plasma Walls Beyond the Perfect Absorber Approximation for Electrons

Contact Info

Product

Resources

About