Noble gas impurity balance and exhaust model for DIII-D and JET [electronic resource]
Experiments to study the exhaust of noble gases (helium, neon) with cryopumping in DIII-D Advanced Divertor Program (ADP) configuration and in JET (Mk1 configuration) found significant differences in the global exhaust rate of helium, while efficient neon exhaust was observed in both machines. An at...
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Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Washington, D.C. : Oak Ridge, Tenn. :
United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1998.
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| Subjects: |
MARC
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| 245 | 0 | 0 | |a Noble gas impurity balance and exhaust model for DIII-D and JET |h [electronic resource] |
| 260 | |a Washington, D.C. : |b United States. Dept. of Energy. Office of Energy Research ; |a Oak Ridge, Tenn. : |b distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, |c 1998. | ||
| 300 | |a 17 p. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
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| 500 | |a Published through the Information Bridge: DOE Scientific and Technical Information. | ||
| 500 | |a 05/01/1998. | ||
| 500 | |a "ORNL/CP--98123" | ||
| 500 | |a "CONF-980560--" | ||
| 500 | |a "DE98005577" | ||
| 500 | |a "AT5010701" | ||
| 500 | |a 13. international conference on plasma surface interactions, San Diego, CA (United States), 18-22 May 1998. | ||
| 500 | |a Wade, M.R.; Morgan, P.; Hogan, J.; Koenig, R.; Hellermann, M. von; Horton, L.; Hillis, D.L.; Saibene, G.; Ehrenberg, J. | ||
| 520 | 3 | |a Experiments to study the exhaust of noble gases (helium, neon) with cryopumping in DIII-D Advanced Divertor Program (ADP) configuration and in JET (Mk1 configuration) found significant differences in the global exhaust rate of helium, while efficient neon exhaust was observed in both machines. An attempt to better understand the basic processes governing the exhaust of noble gases in ELMy H-mode with cryopumping has been undertaken. Since divertor geometries investigated in the DIII-D and in the JET cases have significant differences, a comparative modeling study has been undertaken using the MIST core impurity transport code and the b2.5 time-independent divertor transport code. Photodiode measurements are used to determine ELM frequency, and charge-exchange recombination (CER) measurements are compared with the MIST ELM model to evaluate transport coefficients in the core plasma. A significant reduction in the anomalous diffusivities is found for the non-ELM component of radial transport without the need for a pinch velocity, and the model provides a more coherent description than the conventional ELM-averaged approach. Sensitivity to boundary conditions has been studied through establishment of a database of divertor enrichment cases using b2.5. | |
| 536 | |b AC05-96OR22464. | ||
| 650 | 7 | |a Cryopumps. |2 local. | |
| 650 | 7 | |a Doublet-3 Device. |2 local. | |
| 650 | 7 | |a Jet Tokamak. |2 local. | |
| 650 | 7 | |a Helium Ash. |2 local. | |
| 650 | 7 | |a Neon. |2 local. | |
| 650 | 7 | |a H-mode Plasma Confinement. |2 local. | |
| 650 | 7 | |a Divertors. |2 local. | |
| 650 | 7 | |a Plasma Impurities. |2 local. | |
| 650 | 7 | |a Plasma Scrape-off Layer. |2 local. | |
| 650 | 7 | |a Edge Localized Modes. |2 local. | |
| 650 | 7 | |a Boundary Conditions. |2 local. | |
| 650 | 7 | |a Plasma Physics And Fusion. |2 edbsc. | |
| 710 | 2 | |a Oak Ridge National Laboratory. |b . |4 res. | |
| 710 | 1 | |a United States. |b Department of Energy. |b Office of Energy Research. |4 spn. | |
| 710 | 2 | |a United States. |b Department of Energy. |b Office of Scientific and Technical Information. |4 dst. | |
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| 952 | f | f | |p Can circulate |a University of Colorado Boulder |b Online |c Online |d Online |e E 1.99:CONF-980560-- |h Superintendent of Documents classification |i web |n 1 |