10.08-mm drift tube), the VEBA pulse line accelerator (producing a 6-mm-diameter 900-keV 600-A 60-nsec FWHM relativistic electron beam), and a measurement setup. Linear growth at 1.2 dB/cm is reported, with total gain 50 dB, coherent emission 17 MW, and efficiency greater than 3 percent. (T.K.) Source of Abstract (Subfile): AIAA/TIS Descriptors: ‘ENERGY CONVERSION EFFICIENCY; ‘FREE ELECTRON LASERS; ‘HIGH GAIN; ‘LASER OUTPUTS; ‘LASING; LASER MODES; MAGNETRONS; POLARIZATION CHARACTERISTICS; WIGGLER MAGNETS Subject Classification: 7536 Lasers & Masers (1975- ) A linear regulator in a nonlinear system—Application in a solar central receiver SWORDER, D. D.; CHOU, D. S. (California, University, La Jolla, CA) IN: American Control Conference, San Francisco, CA, June 22-24, 1983, Proceedings. Volume 1 (A84-25451 10-63). New York, Institute of Electrical and Electronics Engineers, 1983, p. 333, 334. Contract No: NSF ECS-80-03547 Language: English Country of Origin: United States. Country of Publication: United States Document Type: CONFERENCE PAPER Most documents available from AI A A Technical Library Journal Announcement: IAA8410 Sworder and Roger's (1983) temperature control regulator for the single panel of a solar powered central receiver, which was designed on the basis of a family of linear models, is presently followed up by a study, using a simple nonlinear thermodynamic model of that panel, which compares the synthesis model's response predictions to those obtained with the nonlinear model. It is found that, for the conditions stipulated in the study, the linear model yields an accurate approximation of the global model's response characteristics. (O.C.) Source of Abstract (Subfile): AIAA/TIS Descriptors: *BOILERS; ‘FEEDBACK CONTROL; NONLINEAR SYSTEMS; ‘REGULATORS; ‘SOLAR COLLECTORS; ‘TEMPERATURE CONTROL; DYNAMIC MODELS; HELIOSTATS; LINEAR SYSTEMS; MATHEMATICAL MODELS; PERFORMANCE PREDICTION; PHOTOTHERMAL CONVERSION; SOLAR ENERGY CONVERSION; TIME RESPONSE Subject Classification: 7544 Energy Production & Conversion (1975- ) Modelling needed for the design and definition of spacecraft attitude and orbit control systems MODELISATIONS NECESSAIRES A LA CONCEPTION ET LA DEFINITION DES SYSTEM DE COMMANDE D'ATTITUDE ET D'ORBITE DES VEHI- CULES SPATIAUX DUCHON, P. Centre National d'Etudes Spatiales, Toulouse (France). Corp. Source Code: CL469024 In its Space Math, for the Prepn. and the Develop, of Satellite Exploit, p. 501-535 (SEE N85-24753 14-59). 1984. Language: French
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