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ABSTRACT: Output field patterns of a 110-GHz, 10-kW gyrotron with a pulsed magnetic field and a 140-GHz, 0.5-W millisecond-pulse orotron have been imaged using visible continuum emitted by a slab of the Cs-Xe DC discharge.
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on; 10/2006
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ABSTRACT: It has been demonstrated that recombination continuum emitted by a slab of the positive column of the Cs-Xe discharge can be used successfully to image moderate-power pulsed millimeter waves. Using this technique, the output field patterns of a 110-GHz 10-kW gyrotron with a pulsed magnetic field have been imaged.
IEEE Transactions on Plasma Science 05/2005; · 1.17 Impact Factor
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ABSTRACT: We study experimentally the possibility of using the recombination continuum (RC) emitted by a nonequilibrium plasma of the positive column (PC) of a Cs–Xe discharge for real-time imaging of the spatial distribution of microwave intensity. A uniform plane slab of dense plasma of the PC of a Cs–Xe discharge with aperture 108cm2 was used for the imaging. A continuous-wave (CW) magnetron was the microwave source with frequency 35.4GHz and power up to 20W. We measured the dependence of the RC intensity on the intensity of the microwaves incident on the plasma. Spatial distributions of the microwave intensity for a microwave beam and the H01 mode of a circular waveguide were imaged. The results of these experiments show that spatial distributions of microwave intensity measured using RC agree well with the distributions obtained using other methods. A temporal resolution of 10s was demonstrated and an energy-flux sensitivity of about 410-5J/cm2 was achieved in the microwave-imaging experiments.
Radiophysics and Quantum Electronics 01/2003; 46(8):722-728. · 0.71 Impact Factor
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ABSTRACT: A uniform slab of dense plasma of the positive column of a Cs-Xe
DC discharge was created under a xenon pressure of 15 torr. It was
demonstrated that the blue recombination continuum of cesium emitted by
the plasma slab can be used for real-time imaging of microwave beams
IEEE Transactions on Plasma Science 03/2002; · 1.17 Impact Factor
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ABSTRACT: Design and production of microwave sources and transmission lines, microwave nondestructive imaging in opaque media, as well as other scientific, industrial, and medical applications require convenient real-time methods for recording the spatial distribution of microwave intensity (S.O. Kuznetsov and I. Malygin, Int. J. IR and MM Waves, vol. 12, no. 11, pp. 1241-1252, 1991; J.-C. Bolomey, IEEE Trans. Microwave Theory Tech., vol. 37, no. 12, pp. 2109-2117, 1989). In this paper we discuss the method of microwave beam imaging by the blue recombination continuum of cesium emitted by a slab of the positive column (PC) of a Cs-Xe DC discharge. The blue recombination continuum of cesium (optical wavelength shorter than 500 nm) originates from radiative recombination of electrons and cesium atomic ions into the 6P state of cesium (Y.P. Raizer, Gas Discharge Physics, ch. 9, Springer, Berlin, 1991; J.M. Wetzer, Physica C, vol. 123, pp. 247-256, 1984; L. Agnew and W.H. Reichelt, J. Appl. Phys., vol. 39, no. 7, pp. 3149-3155, 1968). We anticipate that this sensitive imaging method can be used for real-time recording of the spatial distribution of microwave intensity.
Infrared and Millimeter Waves, 2002. Conference Digest. Twenty Seventh International Conference on; 02/2002
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ABSTRACT: A new sensitive method for imaging of the spatial distribution of microwave intensity is proposed. The method is based on
the imaging of the 6P-recombination continuum of cesium, emitted from a nonequilibrium plasma of the positive column of gas discharge in a cesium
vapor-xenon mixture. It is demonstrated that the spatial distribution of intensity of 35-GHz microwave radiation measured
by this method in a focal plane of a lens well coincides with the pattern obtained with the aid of a movable microwave detector.
The time resolution of the proposed microwave imaging system reaches 1 ms.
Technical Physics Letters 01/2002; 28(6):445-447. · 0.56 Impact Factor
