### Abstract

Experiments have been conducted to examine the tail erosion phenomenon by transmitting microwave pulses (1.1 μs, and hundreds of kW power level) through a large Plexiglas chamber filled with dry air at 1 to 2 torr pressure. A theoretical model based on two coupled partial differential equations was established to describe the propagation of intense microwave pulse in an air breakdown environment. One is derived from the Poynting theorem and the other is the rate equation of electron density. They are coupled through the density dependence of the plasma dielectric constant in the Poynting equation, and the field dependence of the ionization frequency in the electron rate equation. A computer simulation of the chamber experiment based on the developed model was then performed for comparison. It was shown that all the characteristic features of tail erosion observed in the experiments can be reproduced by the computer simulation. Furthermore, a transformation of the model equations to a local time frame of reference is properly designed so that these equations can be simplified for efficient numerical analysis.

Original language | English (US) |
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Title of host publication | 91 IEEE Int Conf Plasma Sci |

Publisher | Publ by IEEE |

Pages | 90 |

Number of pages | 1 |

ISBN (Print) | 0780301471 |

State | Published - 1991 |

Event | 1991 IEEE International Conference on Plasma Science - Williamsburg, VA, USA Duration: Jun 3 1991 → Jun 5 1991 |

### Other

Other | 1991 IEEE International Conference on Plasma Science |
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City | Williamsburg, VA, USA |

Period | 6/3/91 → 6/5/91 |

### Fingerprint

### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*91 IEEE Int Conf Plasma Sci*(pp. 90). Publ by IEEE.

**Modeling of powerful microwave pulse propagation in air breakdown environment.** / Kuo, Spencer; Zhang, Y. S.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*91 IEEE Int Conf Plasma Sci.*Publ by IEEE, pp. 90, 1991 IEEE International Conference on Plasma Science, Williamsburg, VA, USA, 6/3/91.

}

TY - GEN

T1 - Modeling of powerful microwave pulse propagation in air breakdown environment

AU - Kuo, Spencer

AU - Zhang, Y. S.

PY - 1991

Y1 - 1991

N2 - Experiments have been conducted to examine the tail erosion phenomenon by transmitting microwave pulses (1.1 μs, and hundreds of kW power level) through a large Plexiglas chamber filled with dry air at 1 to 2 torr pressure. A theoretical model based on two coupled partial differential equations was established to describe the propagation of intense microwave pulse in an air breakdown environment. One is derived from the Poynting theorem and the other is the rate equation of electron density. They are coupled through the density dependence of the plasma dielectric constant in the Poynting equation, and the field dependence of the ionization frequency in the electron rate equation. A computer simulation of the chamber experiment based on the developed model was then performed for comparison. It was shown that all the characteristic features of tail erosion observed in the experiments can be reproduced by the computer simulation. Furthermore, a transformation of the model equations to a local time frame of reference is properly designed so that these equations can be simplified for efficient numerical analysis.

AB - Experiments have been conducted to examine the tail erosion phenomenon by transmitting microwave pulses (1.1 μs, and hundreds of kW power level) through a large Plexiglas chamber filled with dry air at 1 to 2 torr pressure. A theoretical model based on two coupled partial differential equations was established to describe the propagation of intense microwave pulse in an air breakdown environment. One is derived from the Poynting theorem and the other is the rate equation of electron density. They are coupled through the density dependence of the plasma dielectric constant in the Poynting equation, and the field dependence of the ionization frequency in the electron rate equation. A computer simulation of the chamber experiment based on the developed model was then performed for comparison. It was shown that all the characteristic features of tail erosion observed in the experiments can be reproduced by the computer simulation. Furthermore, a transformation of the model equations to a local time frame of reference is properly designed so that these equations can be simplified for efficient numerical analysis.

UR - http://www.scopus.com/inward/record.url?scp=0026396528&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026396528&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0026396528

SN - 0780301471

SP - 90

BT - 91 IEEE Int Conf Plasma Sci

PB - Publ by IEEE

ER -