Experimental studies of high-power microwave reflection, transmission, and absorption from a plasma-covered plane conducting boundary
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Date
1991-05-01Author
Destler, William
DeGrange, J.
Fleischmann, H.
Rodgers, J.
Segalov, Z.
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Experimental studies of the reflection, transmission, and absorption of high-power microwave
pulses from a plasma-covered plane conducting boundary are presented. Under optimum
conditions, backscattered rf power is attenuated by more than 30 dB over values measured in
the absence of the plasma. Measurements of the radial and axial plasma density profiles and
the neutral gas pressure near the plane conductor indicate that collisional absorption processes
are not the primary source of the observed attenuation in the backscattered microwave signal,
and that the plasma density exceeds the critical density over much of the volume nearest the
conductor. The effects of a tenfold reduction in the microwave power density on the reflection
and absorption characteristics of the system are also reported.
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