Document Type: JOURNAL ARTICLE; TRANSLATION Most documents available from AIAA Technical Library Journal Announcement: IAA8508 The existence of 6-pi periodic solutions of the differential equation of motion of the plane, restricted, elliptical three—body problem in complex form in the vicinity of a libration point is investigated. The approximate construction of the solutions is studied, and it is shown that the equation of this three-body problem for sufficiently small orbital eccentricity in the vicinity of the libration point has a continuum of 6pi periodic solutions in the form of series in powers of the eccentricity. The process of determining the coefficients of the series which are solutions of the correspond!ng linear differential equations is stabilized. The convergence of these series can be proved by the ordinary principle of contractive mappings. (C.D. ) Source of Abstract (Subfile): AIAA/TIS Keywords: ♦CELESTIAL MECHANICS; ♦ELLIPTICAL ORBITS; ♦PERIODIC FUNCTIONS; ♦THREE BODY PROBLEM; ECCENTRIC ORBITS; LIBRAT ION Subject Classification: 7589 Astronomy (1975-) Free electron lasers show their power. ROBINSON, A. L. Science (ISSN 0036-8075), vol. 226, Dec. 14, 1984, p. 1300- 1302. 5 Refs. Language: Engli sh. Country of Origin: United States. Country of Publication: United States Document Type: JOURNAL ARTICLE Most documents available from AIAA Technical Library Journal Announcement: IAA8508 Recent investigations of high-efficiency free-electron lasers (FELs) operating in the mm wavelength range are surveyed. The potential military and scientific applications of FELs are indicated; the general physical principles involved are explained; experiments using field- emission-diode accelerators, undulators, and solonoidal guide fields to produce pulses of up to 50 nsec are described; and the use of linear induction accelerators without guide fields to produce longer pulses with higher- energy and higher current is discussed. FEL amplification of 23-kW 8.6-mm radiation from a magnetron to 80 MW (with efficiency 5 percent) is reported for a device with a 3.5—MeV 600-A 1inear-induction-accelerator beam, and the applicability of this approach to the amplification of 10-micron radiation (using the 50-MeV 10-kA beam from the accelerator under construction at Livermore) is considered. (T. K. ) Source of Abstract (Subfile): AIAA/TIS Keywords: ♦ FREE ELECTRON LASERS; ♦LASER OUTPUTS; ♦LASING; ♦MILLIMETER WAVES; ENERGY CONVERSION EFFICIENCY; LINEAR ACCELERATORS; MAGNETIC FIELDS; PARTICLE ACCELERATORS; SOLENOIDS; TECHNOLOGY UTILIZATION Subject Classification: 7536 Lasers & Masers (1975-)
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