Report. No.: AD-A139301; YALEU/DCS/TR-301 Contract No.: N00014-82-K-0184; DAAG29-83-K--0177 La n guage: Eng1i sh. Country of Origin: United States. Country of Publication: United States Document Type: REPORT Most documents available from AIAA Technical Library Other Availabi1ity: NTIS HC A02/MF AOI Commissariat a 1'Energie Atomique, Centre d'Etudes Nucleaire de Sac lay, Gif-sur-Yvette, Essonne, France); ROBINSON, K. E. ; MADEY, J. M. J. (CNRS, Laboratoire pour 1'Uti1isation du Rayonnement Electromagnetique, Orsay, Essonne, France; Stanford University, Stanford, CA); VELGHE, M. (CNRS, Orsay, Essonne, France); BAZIN, C.; BERGHER , M. ; PETRFF , Y. (CNRS, Laboratoirepour 1 Utilisation du Rayonnement. Electromagnetique, Orsay, Essone, France) Applied Physics B - Photophysics and Laser Chemistry (ISSN 0721-7269), vol. B34, Aug. 1984, p. 207-219. Research supported by the Commissariat a 1'Energie Atomique, Centre Nationa1 de 1a Recherche Scientifique, and Direction des Recherches, Etudes et Techniques. 18 Refs. Contract No.: DRET-81-131; F49420-80-C-0068 Language: Eng1ish. Country of Ori gin: France. Country of Pub1i c at ion: Germany, Federa1 Repub1ic of Document. Type: JOURNAL ARTICLE Most documents available from AIAA Technical Library Journa1 Announcement: IAA84 21 To improve the gain in the Orsay storage ring Free Electron Laser (FEL) experiment, the 17 period permanent maqnet undu1 ator has been mo d i f i e d to form an op t ica1 klystron (OK). The? measurement of spontaneous emission and the effects on it of energy spread and angular spread are reported. Gain and 1 aser induced bunch 1engthening measurements' with the OK are also reported and are in very good agreement with the FEL classical theory. The spontaneous emission spectrum which is easy to measure? with good signal to noise? ratio, turns out to be a very good diagnostic tool for energy spread and anguylar spread measurements on storage rings. The factor of four increase in the small gai n obtai ned by conver t i ng the undu 1 ator NOEL into an OK was the critical factor in the? recent, operation of the ACO storage ring laser above threshold. (Author) Source of Abstract (Subfile): AIAA/TIS Descriptors: *FREE ELECTRON LASERS; *KLYSTRONS; *LASER OUTPUTS; *RING LASERS; *STORAGE RINGS (PARTICLE ACCELERATORS); ELECTRON TRAJECTORIES; EMISSION SPECTRA; ENERGY DISTRIBUTION; POWER GAIN; SPONTANEOUS EMISSION Sub ject Classification: 7536 Lasers Masers (1975-) Cyclotron maser and peniotron-1ike instabilities in a whispering gallery mode gyrotron. VITELLO, P. (Science Applications, Inc., McLean, VA) IEEE Transactions on Microwave Theory and Techniques (ISSN 0018-9480), vol. MTT-32, Aug. 1984, p. 917.921. Research supported by the University of California. 15 Refs. Contract No.: DAAG29-82-K—0004
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