In the case of a compound parabolic concentrator (CPC), it is possible to both reduce transmission losses and achieve much higher concentrations by employing it not as a first but as a second stage concentrator. Attention is presently given to the effect of the finite angular width of the sun on the design of a linear Fresnel reflector concentrator (FRC), on the intensity distribution of the FRC's receiver plane, and on the combined concentration ratio of an FRC and a CPC in tandem systems. (O.C.) Source of Abstract (Subfile): AIAA/TIS Descriptors: *CONCENTRATORS; *DESIGN ANALYSIS; *FRESNEL REFLECTORS; *PARABOLIC REFLECTORS; *SOLAR ENERGY CONVERSION; ENERGY CONVERSION EFFICIENCY; ENERGY TECHNOLOGY; GEOMETRICAL OPTICS; TRANSMISSION LOSS Subject Classification 7544 Energy Production & Conversion (1975- ) A radar power supply without a voltage droop (solar battery scaling for driving klystron operating spacebome radar) SCHWARZ, F. C.; KLAASSENS, J. B. (Delft, Technische, Hogeschool, Delft, Netherlands) IN: PESC '83; Annual Power Electronics Specialists Conference, 14th, Albuquerque, NM, June 6-9, 1983, Record (A84-18409 06-33). New York, Institute of Electrical and Electronics Engineers, 1983, p. 230-241. Sponsorship: European Space Agency. 10 Refs. Contract No.: ESA-4657 Language: English Country of Origin: Netherlands. Country of Publication: United States Document Type: CONFERENCE PAPER Most documents available from AI A A Technical Library Journal Announcement: IAA8406 A principle of fine regulation applied on a high-voltage line supplying a pulsed load (a radar tube) has been developed with the aim of scaling solar battery power in space to drive a klystron for the purpose of operating a spaceborne radar system. The HV power supply system combines a single series resonant converter and an efficient capacitor multiplier in the output stages. The electronic power conversion system utilizes a Schwarz converter with a series resonant circuit for power transfer and control. An internal frequency of 35 kHz enhances the power density of the converter model; this model provides 16 kV for the helix-cathode circuit of a klystron with an accuracy of 0.5 per mille and 11 kV for the collector-cathode circuit with an accuracy of 5 percent. (B.J.) Source of Abstract (Subfile): AIAA/TIS Descriptors: *ELECTRIC POWER SUPPLIES; *HIGH VOLTAGES; ♦NETWORK SYNTHESIS; *POWER CONVERTERS; *RADAR EQUIPMENT; ♦VOLTAGE REGULATORS; CAPACITORS; ELECTRONIC CONTROL; KLYSTRONS; POWER EFFICIENCY; RESONANCE; SOLAR CELLS; SPACECRAFT POWER SUPPLIES Subject Classification: 7520 Spacecraft Propulsion & Power (1975- ) Spectral gain profile of a GaAlAs injection heterolaser GOLDOBIN, I. S.; RIVLIN, L. A.; SEMENOV, A. T.; SOLODKOV, A. F.;
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