Breakdown-induced distortion of high-power microwave pulses in air

Löfgren, Martin; Anderson, Dan; Lisak, M.; Lundgren, L.

doi:10.1063/1.859731

Cited by 20 publications

(13 citation statements)

References 5 publications

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“…E t is typically defined 22 as the minimum field imparting enough average energy to electrons for the ionization rate ν i to increase the electron density n significantly above its initial value n 0 (n/n 0 ≈ 10 8 − 10 12 ) in time τ . The dependence of E t on gas pressure p can be understood in terms of the electron loss mechanisms that temper the growth of an electron avalanche and thus control the onset of breakdown.…”

Section: 11mentioning

confidence: 99%

Pressure dependence of plasma structure in microwave gas breakdown at 110 GHz

Cook

Shapiro

Temkin

2010

Applied Physics Letters

135

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Recent studies of 110 GHz microwave discharges in air at atmospheric pressure have demonstrated formation of a large array of quarter-wavelength-spaced plasma filaments. Here we present measurements showing that as pressure is decreased from atmosphere to a few torr, the discharge transitions from a well-defined array to a smeared-out array and finally to a diffuse plasma. Despite the distinct nature of breakdown phenomena at high microwave frequencies, the pressure dependence of the breakdown threshold field is seen to follow a Paschen-type curve. Data for air and argon at 110 GHz are compared with previous low-frequency data.

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Section: 11mentioning

confidence: 99%

Pressure dependence of plasma structure in microwave gas breakdown at 110 GHz

Cook

Shapiro

Temkin

2010

Applied Physics Letters

135

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“…It is because, as a transient simulation, the characteristic time for diffusion is much longer than simulating time that we concerned, and the loss to the wall is also neglected since the diffusion loss and secondary electron emission are neutralized. 11,24 We apply the SETD method to solve the non-linear strong coupled PDEs (1)- (5). The SETD method brings up two advantages.…”

Section: B Transport Coefficientsmentioning

confidence: 99%

“…How to quickly predict, analyze, and prevent the gas microwave breakdown discharge phenomenon is becoming a hot topic. [1][2][3][4][5][6][16][17][18][19]21 For one thing, as long as a high power microwave (HPM) or ultra wide-band (UWB) pulse is introduced into an electronic device by front-door or back-door coupling, a communication system will be endangered severely or even permanently destroyed. For another thing, from the protective point of view, the plasma generated by a gas discharge has special abilities to absorb microwave energy, and it can be utilized as a protective device such as a limiter or filter.…”

Section: Introductionmentioning

confidence: 99%

A fluid model simulation of a simplified plasma limiter based on spectral-element time-domain method

et al. 2015

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A simplified plasma limiter prototype is proposed and the fluid model coupled with Maxwell's equations is established to describe the operating mechanism of plasma limiter. A three-dimensional (3-D) simplified sandwich structure plasma limiter model is analyzed with the spectral-element timedomain (SETD) method. The field breakdown threshold of air and argon at different frequency is predicted and compared with the experimental data and there is a good agreement between them for gas microwave breakdown discharge problems. Numerical results demonstrate that the two-layer plasma limiter (plasma-slab-plasma) has better protective characteristics than a one-layer plasma limiter (slab-plasma-slab) with the same length of gas chamber. V C 2015 AIP Publishing LLC.

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“…We observe the usual dependence of the breakdown electric field and breakdown time with pressure, which exhibit minima. 17,18 Changing the incident power corresponds to a change in the rate of increase of the electric field ͓Eq. ͑10͔͒.…”

Section: Electromagnetic Behavior Of the Cavity In The Presence Omentioning

confidence: 99%

Experimental study of energy coupling and plasma breakdown in a pulsed high frequency resonant cavity

Lacoste

Dias

Boisse‐Laporte

et al. 2001

Journal of Applied Physics

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An experimental study of the electromagnetic behavior of a pulsed high frequency resonant cavity, operating in its fundamental TE111 mode, is presented. Typical pulse characteristics are a pulse width of 10 μs, microwave frequency of 1 GHz, and microwave power of a few kW. The various parameters (characteristic time τ, coupling factor β, incident power Pi) that determine the temporal variation of the electrical characteristics (power entering in the cavity, electric field) during the pulse are defined. In particular, the influence of the coupling factor on the transition stage to a steady state is discussed for the cavity without plasma. The temporal behavior of the cavity in the presence of a gas (argon and hydrogen) is also studied. For pressures ranging from 0.5 to 100 Torr, the discharge breakdown parameters (time τb, electric field Eb) in hydrogen are deduced from the experiments (tb∼0.1–1 μs, Eb∼300–3000 V/cm). The conditions to reach a quasisteady state plasma are derived from the qualitative analysis of the cavity behavior.

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Breakdown-induced distortion of high-power microwave pulses in air

Cited by 20 publications

References 5 publications

Pressure dependence of plasma structure in microwave gas breakdown at 110 GHz

Pressure dependence of plasma structure in microwave gas breakdown at 110 GHz

A fluid model simulation of a simplified plasma limiter based on spectral-element time-domain method

Experimental study of energy coupling and plasma breakdown in a pulsed high frequency resonant cavity

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