Optimized linear magnetohydrodynamic (MHD) systems to produce 200 MWe for 1000 seconds are defined. For the specific mission envisioned, a mass flow of 45.36 Kg/sec (100 Ibs/sec) of hydrogen is available to the system. Westinghouse NERVA reactor technology can heat this mass flow of hydrogen to 2550 K at a pressure of 12 atm. This hydrogen flow is assumed to be seeded with cesium to obtain the requi red MHD generator conducti vity. For each MHD system concept considered, the MHD generator design was op t imi z ed in terms of operating Mach number, load parameter, and cesium seed fraction. The simplest, concept, an open-cycle MHD system, is optimized by minimizing the total magnet plus cesium seed mass. The resulting magnet and magnet plus seed mass are 44092 and 54143 Kg respec ti ve1y. The second concept considered was an, open-cycle MHD system with seed recovery and reuse. It; is optimized by minimizing the magnet mass. The resulting magnet mass is 40110 Kg. A third concept, a c 1 osed-cyc1e MHD system, was a 1 s o considered. If only equilibrium conductivity is considered, cesium seeded hydrogen is shown to be the more attractive than cesium seeded helium, and the optimum generator would be identical to that for the open-cycle MHD system with seed recovery. (Author) Source of Abstract (subfi1e): AIAA/TIS Keywords: *ELECTRIC POWER; *ENERGY CONVERSION; *MAGNETOHYDRODYNAMJ C GENERATORS; *REACTOR TECHNOLOGY; CESIUM; DESIGN ANALYSIS; ELECTRICAL RESISTIVITY; LINEAR SYSTEMS; MAGNET S; OFT IMIZ AT ION Subject Classification: 7575 Plasma Physics (1975.) Energy characteristics of a waveguide C02 laser. KONEV, IU. B. ; LIPATOV, N. I.; PASHININ, P. P.; PROKHOROV, A. M. (Akademiia Nauk SSSR, Institut Obshchei Fiziki, Moscow, USSR) (Kvantovaia Elektronika /Moscow/, vol. 11, Aug. 1984, p. 1641-1645) Soviet Journal of Quantum Electronics (ISSN 0049-1748), vol. 14, Aug. 1984, p. 1102-1105. Translation. 11 Refs. Language: Eng1ish. Country of 0r i gi n : U. S. S. R. . Country of Publ i cat i on : United States Document Type: JOURNAL ARTICLE; TRANSLATION Most documents available from AIAA Technical Library Journa1 Announcement: IA A8507 The composition of the laser active medium is assumed to be constant and the rate equations for the average numbers of vibrational quanta are used to simulate numerically the operation of a waveguide CO2 laser as a linear amplifier and as an oscillator. These equations allow for the quantum flux (to levels higher than the minimum of the Treanor distribution function of the antisymmetric mode of the C02 molecule) which is due to the high degree of vibrational excitation of the laser medium and they also allow for surface deactivation of C02 molecules at the inside walls of the waveguide. The calculations are made for two typical diameters of the discharge channel , 1.5 and 2 mm. The results are given in
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