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Interaction with the lower ionospher...

Taranenko, Yuri Nicholaevich.

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Interaction with the lower ionosphere of electromagnetic pulses from lightning: Heating, attachment, ionization, and optical emissions.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Interaction with the lower ionosphere of electromagnetic pulses from lightning: Heating, attachment, ionization, and optical emissions./
作者:	Taranenko, Yuri Nicholaevich.
面頁冊數:	112 p.
附註:	Adviser: Umran S. Inan.
Contained By:	Dissertation Abstracts International54-12B.
標題:	Engineering, Electronics and Electrical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9414663

Interaction with the lower ionosphere of electromagnetic pulses from lightning: Heating, attachment, ionization, and optical emissions.
Taranenko, Yuri Nicholaevich.

Interaction with the lower ionosphere of electromagnetic pulses from lightning: Heating, attachment, ionization, and optical emissions. - 112 p.

Adviser: Umran S. Inan.

Thesis (Ph.D.)--Stanford University, 1994.

A typical lightning discharge produces an intense 20 gigawatt electromagnetic (EM) pulse of 50 to 150 $\muSubjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Interaction with the lower ionosphere of electromagnetic pulses from lightning: Heating, attachment, ionization, and optical emissions.
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100 1 $a Taranenko, Yuri Nicholaevich. $3 1263983
245 1 0 $a Interaction with the lower ionosphere of electromagnetic pulses from lightning: Heating, attachment, ionization, and optical emissions.
300 $a 112 p.
500 $a Adviser: Umran S. Inan.
500 $a Source: Dissertation Abstracts International, Volume: 54-12, Section: B, page: 6386.
502 $a Thesis (Ph.D.)--Stanford University, 1994.
520 $a A typical lightning discharge produces an intense 20 gigawatt electromagnetic (EM) pulse of 50 to 150 $\mu $s duration. A significant portion of this energy propagates upward where it interacts with the ambient electrons in the collisional lower ionosphere. In the present work the Boltzmann kinetic equation for electrons and Maxwell's equations for the EM fields are self-consistently solved to simulate the interaction of lightning radiated EM pulses with the lower ionosphere. Results indicate that attachment, ionization, and optical emissions produced in this interaction are sufficient to explain 'early' subionospheric VLF signal perturbations and airglow brightening observed simultaneously with lightning. This model also provides the basis for the quantitative evaluation of a wide variety of electrodynamic and chemical processes in the ionosphere which occur in response to the energy released in lightning discharges. Under nighttime conditions, individual pulses with peak amplitudes of 10-20 V/m (normalized to 100 km free space distance) produce changes in electron density of 1-30% of the ambient while a sequence of such pulses leads to more than 100% modification at altitudes between 85 and 92 km. Among the optical emissions, the most promising for observations are the 1st (red) and 2nd (blue) positive bands of N$\sb2$, which emit at rates of $7 \times 10\sp7$ and $\rm 10\sp7$ cm$\rm\sp{-3}s\sp{-1}$ at $\sim $9 2 km respectively for a 20 V/m EM pulse. The height integrated intensities of the emissions reach $4 \times 10\sp7$ and $6 \times 10\sp6$ R, last for $\sim $5 0 $\mu $s and produce 1,200 and 200 Rayleigh-seconds for zenith observations.
590 $a School code: 0212.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Atmospheric Science. $3 1019431
690 $a 0544
690 $a 0608
710 2 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 54-12B.
790 $a 0212
790 1 0 $a Inan, Umran S., $e advisor
791 $a Ph.D.
792 $a 1994
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9414663