Electrical breakdown in gases

Malik, N. H.; Qureshi, A. H.

doi:10.1109/dld.1978.7739927

Cited by 26 publications

(39 citation statements)

References 27 publications

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“…V rms stands for average value. The Paschen's Law curves for different gases can also be seen in the figure [36][37][38]. The breakdown voltage shows a trend of first decreasing and then increasing with the increase of the product of gap distance and air pressure.…”

Section: Breakdownmentioning

confidence: 82%

A review on insulation challenges towards electrification of aircraft

Jiang

et al. 2023

High Voltage

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Compared to the traditional aircraft, electrification of power system in aircraft has potential to revolutionise the aviation industry. Typically, more-electric aircraft (MEA), even all-electric aircraft has been developed and delivered to decrease the greenhouse gas emission and increase the energy efficiency. The next generation of MEA will operate at high voltage to facilitate the transfer of significant levels of electrical power in an electrified aircraft. However, the higher voltage inevitably leads to an increased risk to the insulation of the electrical components and power system. This study aims to provide a critical overview of the insulation challenges from the perspective of electrified aircraft, typically MEA application. The development of MEA and the special working conditions are explained at the beginning. Then the insulation challenges of power modules, electric machines, aeronautical cables etc. are discussed in detail. Finally, the existing technical barriers and future prospects of insulation for electrified aircraft are summarised. It provides a reference for the future design and test in power system of next generation MEA and related electrified air transportations.

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Section: Breakdownmentioning

confidence: 82%

A review on insulation challenges towards electrification of aircraft

Jiang

et al. 2023

High Voltage

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“…The breakdown is then determined by a rapid gas transition from a poor electrical conduction with high resistivity (about 10 14 Ω•m) to a relatively good conduction with lower resistivity. [37] Inside a plasma medium, the time lag of a breakdown is given by the sum of the retardation time and the formative time. The retardation time is dependent on the probability to get primary electrons for starting the carrier multiplication.…”

Section: Background On Breakdownmentioning

confidence: 99%

Exploration of the Townsend regime by discharge light emission in a gas discharge device

Kurt

2014

Chinese Phys. B

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The Townsend discharge mechanism has been explored in a planar microelectronic gas discharge device (MGDD) with different applied voltages U and interelectrode distance d under various pressures in air. The anode and the cathode of the MGDD are formed by a transparent SnO 2 covered glass and a GaAs semiconductor, respectively. In the experiments, the discharge is found to be unstable just below the breakdown voltage U b , whereas the discharge passes through a homogeneous stable Townsend mode beyond the breakdown voltage. The measurements are made by an electrical circuit and a CCD camera by recording the currents and light emission (LE) intensities. The intensity profiles, which are converted from the 3D light emission images along the semiconductor diameter, have been analysed for different system parameters. Different instantaneous conductivity σ t regimes are found below and beyond the Townsend region. These regimes govern the current and spatio-temporal LE stabilities in the plasma system. It has been proven that the stable LE region increases up to 550 Torr as a function of pressure for small d. If the active area of the semiconductor becomes larger and the interlectrode distance d becomes smaller, the stable LE region stays nearly constant with pressure.

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“…Numerous methods can be used to create plasma in atmospheric pressure which can be found in the bibliography: [4,[16][17][18]. The experimental study of spark discharges in gas gaps (primarily in air gaps) has a long history [19][20][21] in connection with the practical problems of the dielectric behavior of external insulation. However, the properties of spark discharge plasmas need to be better understood.…”

Section: Introductionmentioning

confidence: 99%

Immunometric study and examination of physical and chemical characteristics of spark plasma

Lotfi,

Khani,

Razaghiha

et al. 2023

Preprint

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In recent years, Spark Plasma has been used as a rejuvenation and correction method to treat some problems, such as signs of aging or some other skin problems. In this study, the physical and chemical characteristics of one of the spark plasmas generating devices have been examined, and an attempt has been made to compare the results with international standards. In this study, the device’s electrical characteristics, such as electric discharge current, leakage current, voltage, and power of the device, have been examined to ensure no risk to the health of patients and consumers of such devices. In the following, the chemical analysis of the gas emitted as a product of skin being treated has been discussed, and the positive and negative points of the presence of these gases, their concentration, and their diffusion distance have been investigated. The skin temperature is measured before, during, and after processing to predict any possible risk. Ultraviolet radiation, which is one of the leading causes of skin problems and the loss of skin strength, has been investigated in this study and compared with the standards compiled for this wavelength of electromagnetic radiation to all safety points in this field can be specified. In this study, the area of the created scabs has been investigated so that the device can be best adjusted to achieve the desired result in any therapeutic field, such as rejuvenation or xanthelasma treatment. Also, skin characteristics such as perfusion and oxygen supply after plasma treatment have been investigated using a hyperspectral camera so that changes in these vital skin characteristics can be monitored.

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Electrical breakdown in gases

Cited by 26 publications

References 27 publications

A review on insulation challenges towards electrification of aircraft

A review on insulation challenges towards electrification of aircraft

Exploration of the Townsend regime by discharge light emission in a gas discharge device

Immunometric study and examination of physical and chemical characteristics of spark plasma

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