Effect of vacuum chamber boronization on the plasma parameters in the L-2M stellarator
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 tha...
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Published in | Plasma physics reports Vol. 31; no. 6; pp. 452 - 461 |
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Main Authors | , , , , , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
01.06.2005
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Subjects | |
Online Access | Get full text |
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Summary: | 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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ISSN: | 1063-780X 1562-6938 |
DOI: | 10.1134/1.1947330 |