Abstract
After boronization of the vacuum chamber of the L-2M stellarator, radiative losses from ohmically and ECR heated plasmas were reduced by a factor of 3–4. Under these conditions, radiative losses in the ECRH regime comprise only 10–15% of the input microwave power. Some effects have been detected that were not observed previously: a substantial increase in the gradient of the electron temperature near the separatrix, a preferentially outward-directed radial turbulent particle flux (both throughout the discharge phase and from shot to shot), and a longer (by a factor of 2–3) duration of the plasma cooling phase.
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References
S. Grebenshchikov, D. Akulina, G. M. Batanov, et al., J. Plasma Fusion Res. SERIES 1, 41 (1998).
V. V. Abrakov, D. K. Akulina, E. D. Andryukhina, et al., Nucl. Fusion 37, 233 (1997).
V. V. Abrakov, D. K. Akulina, E. D. Andryukhina, et al., in Proceedings of the 10th Conference on Stellarators, Madrid, 1995, p. 10.
J. Winter, H. H. Esser, L. Koenen, et al., J. Nucl. Mater. 162–164, 713 (1989).
R. Brakel, R. Burhenn, A. Elsner, et al., in Proceedings of the 8th Stellarator Workshop, Kharkov, 1991, p. 349.
A. Sagara, Y. Hasegawa, H. Tsuzuki, et al., Research Report No. NIFS-468 (NIFS, Toki, 1996).
J. Winter and H. J. Esser, J. Nucl. Mater. 176–177, 486 (1990).
A. I. Kanaev, V. M. Sharapov, A. P. Zakharov, et al., Dokl. Akad. Nauk SSSR 318, 342 (1991) [Sov. Phys. Dokl. 36, 404 (1991)].
V. M. Sharapov, S. V. Mirnov, S. A. Grashin, et al., J. Nucl. Mater. 220–222, 730 (1995).
M. S. Berezhetskii, V. P. Budaev, R. S. Ivanov, et al., J. Nucl. Mater. 162–164, 831 (1989).
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Translated from Fizika Plazmy, Vol. 31, No. 6, 2005, pp. 496–505.
Original Russian Text Copyright © 2005 by Meshcheryakov, Akulina, Batanov, Berezhetski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Voronov, Gladkov, Grebenshchikov, Grinchuk, Grishina, Kolik, Larionova, Letunov, Logvinenko, Petrov, Pshenichnikov, Ryabenko, Sarksyan, Skvortsova, Fedyanin, Kharchev, Khol’nov, Sharapov.
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Meshcheryakov, A.I., Akulina, D.K., Batanov, G.M. et al. Effect of vacuum chamber boronization on the plasma parameters in the L-2M stellarator. Plasma Phys. Rep. 31, 452–461 (2005). https://doi.org/10.1134/1.1947330
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DOI: https://doi.org/10.1134/1.1947330