1. High-repetition CO2 laser for collective Thomson scattering diagnostic of α particles in burning plasmas.
- Author
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Kondoh, T., Hayashi, T., Kawano, Y., Kusama, Y., Sugie, T., Miura, Y., Koseki, R., and Kawahara, Y.
- Subjects
CARBON dioxide lasers ,THOMSON scattering ,ELECTROMAGNETIC wave scattering ,PLASMA gases ,LASERS - Abstract
A high-repetition and high-energy transversely excited atmospheric carbon dioxide (CO
2 ) laser for a collective Thomson scattering (CTS) diagnostic has been developed to establish a diagnostic method of confined α particles in burning plasmas. To excite a single-transverse and single-longitudinal mode, a continuous wave seed laser was injected to an unstable resonator with a cavity length of ∼4.4 m. Pulse energy of 10 J with a repetition rate of 10 Hz has been achieved in the single-mode operation. Pulse energies of 18 J with a repetition rate of 10 Hz and 36 J with single shot operation have also been achieved in the multimode operation. These results give a prospect for the CTS diagnostic on International Thermonuclear Experimental Reactor (ITER), which requires single-mode energy of 20 J with repetition rate of 40 Hz. [ABSTRACT FROM AUTHOR]- Published
- 2006
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