Abstract
Summary form only given. A series of chamber experiments was conducted to investigate three major issues concerning the feasibility of using microwave-produced atmospheric plasma layers as a supplemental reflector for the OTH radar. These include (1) the effectiveness of the plasma layers as a Bragg reflector, (2) the propagation of high-power microwave pulse, and (3) the lifetime of the plasma. Experiments were conducted in a large chamber made of a 2-ft cube of Plexiglas and filled with dry air to a pressure comparable to the upper atmosphere. Two microwave beams (3.27 GHz) generated by a single magnetron tube were fed into the cube, with parallel polarization direction, by two S-band microwave horns placed at right angles to the adjacent sides. A set of parallel plasma layers was then generated in the central region of the chamber where the two beams intersect. A Bragg scattering experiment was then performed using the plasma layers as a Bragg reflector. The experiment results were found to agree very well with the theory, which predicts effective Bragg scattering. The results show that after the first 70 μs the attachment rate is balanced by the detachment rate and the loss of free electrons is mainly determined by the acceptable electron ion recombination rate.
| Original language | English (US) |
|---|---|
| Title of host publication | IEEE Conference Record - Abstracts |
| Publisher | Publ by IEEE |
| Pages | 152 |
| Number of pages | 1 |
| State | Published - 1990 |
| Event | 1990 IEEE International Conference on Plasma Science - Oakland, CA, USA Duration: May 21 1990 → May 23 1990 |
Other
| Other | 1990 IEEE International Conference on Plasma Science |
|---|---|
| City | Oakland, CA, USA |
| Period | 5/21/90 → 5/23/90 |
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ASJC Scopus subject areas
- Engineering(all)
Cite this
On the feasibility of microwave produced Bragg reflector for the OTH radar application. / Kuo, Spencer; Zhang, Y. S.
IEEE Conference Record - Abstracts. Publ by IEEE, 1990. p. 152.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - On the feasibility of microwave produced Bragg reflector for the OTH radar application
AU - Kuo, Spencer
AU - Zhang, Y. S.
PY - 1990
Y1 - 1990
N2 - Summary form only given. A series of chamber experiments was conducted to investigate three major issues concerning the feasibility of using microwave-produced atmospheric plasma layers as a supplemental reflector for the OTH radar. These include (1) the effectiveness of the plasma layers as a Bragg reflector, (2) the propagation of high-power microwave pulse, and (3) the lifetime of the plasma. Experiments were conducted in a large chamber made of a 2-ft cube of Plexiglas and filled with dry air to a pressure comparable to the upper atmosphere. Two microwave beams (3.27 GHz) generated by a single magnetron tube were fed into the cube, with parallel polarization direction, by two S-band microwave horns placed at right angles to the adjacent sides. A set of parallel plasma layers was then generated in the central region of the chamber where the two beams intersect. A Bragg scattering experiment was then performed using the plasma layers as a Bragg reflector. The experiment results were found to agree very well with the theory, which predicts effective Bragg scattering. The results show that after the first 70 μs the attachment rate is balanced by the detachment rate and the loss of free electrons is mainly determined by the acceptable electron ion recombination rate.
AB - Summary form only given. A series of chamber experiments was conducted to investigate three major issues concerning the feasibility of using microwave-produced atmospheric plasma layers as a supplemental reflector for the OTH radar. These include (1) the effectiveness of the plasma layers as a Bragg reflector, (2) the propagation of high-power microwave pulse, and (3) the lifetime of the plasma. Experiments were conducted in a large chamber made of a 2-ft cube of Plexiglas and filled with dry air to a pressure comparable to the upper atmosphere. Two microwave beams (3.27 GHz) generated by a single magnetron tube were fed into the cube, with parallel polarization direction, by two S-band microwave horns placed at right angles to the adjacent sides. A set of parallel plasma layers was then generated in the central region of the chamber where the two beams intersect. A Bragg scattering experiment was then performed using the plasma layers as a Bragg reflector. The experiment results were found to agree very well with the theory, which predicts effective Bragg scattering. The results show that after the first 70 μs the attachment rate is balanced by the detachment rate and the loss of free electrons is mainly determined by the acceptable electron ion recombination rate.
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M3 - Conference contribution
SP - 152
BT - IEEE Conference Record - Abstracts
PB - Publ by IEEE
ER -