The DIII-D summary contribution to the final INTOR workshop
Description
In SIII-D, good H-mode confinement has been obtained with up to 6 MW of neutral-beam injection (NBI). In this report we summarize the essential features of divertor operation for DIII-D H-mode plasma. Briefly, our measurements show that: Large edge density and temperarture gradients are obtained with scale lengths of a few cm at the midplane; In the steady state, approximately 10-20% of the input power is deposited on the divertor plates in a region that is peaked on the separatrix and extends radially over )approx equal) 2-4 cm at the outboard intercept. More power (2:1) reaches the outboard intercept than … continued below
Physical Description
21 pages
Creation Information
Hill, D. N.; Allen, S. L.; Brooks, N. H.; Content, D.; DeBoo, J. C.; Gohil, P. et al. February 26, 1988.
Context
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.
Who
People and organizations associated with either the creation of this report or its content.
Authors
- Hill, D. N.
- Allen, S. L.
- Brooks, N. H.
- Content, D.
- DeBoo, J. C.
- Gohil, P.
- Haas, G.
- Heifetz, D.
- Hsieh, D.
- Hulse, R. A.
- Jackson, G. L.
- Lao, L.
- Mahdavil, M. A.
- Mayberry, M. J.
- Ohyabu, N.
- Perkins, D. E.
- Perry, M. E.
- Petrie, T. W.
- Rensink, M. E.
- Scoville, T.
- Shimada, M.
- Snider, R. T.
- Stockdale, R. E.
- Wood, R. D.
Publishers
-
Lawrence Livermore National Laboratory
Place of Publication: California
-
General Atomics Company
Place of Publication: San Diego, California
-
Johns Hopkins University
Place of Publication: Baltimore, Maryland
-
Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
Place of Publication: United States
-
Princeton University. Plasma Physics Laboratory.
Place of Publication: New Jersey
-
Nihon Genshiryoku Kenkyūjo
Publisher Info: Japan Atomic Energy Research Inst., TokyoPlace of Publication: Tokyo, Japan
Provided By
UNT Libraries Government Documents Department
Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.
Contact Us
What
Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.
Description
In SIII-D, good H-mode confinement has been obtained with up to 6 MW of neutral-beam injection (NBI). In this report we summarize the essential features of divertor operation for DIII-D H-mode plasma. Briefly, our measurements show that: Large edge density and temperarture gradients are obtained with scale lengths of a few cm at the midplane; In the steady state, approximately 10-20% of the input power is deposited on the divertor plates in a region that is peaked on the separatrix and extends radially over )approx equal) 2-4 cm at the outboard intercept. More power (2:1) reaches the outboard intercept than the inboard; Low electron temperature (less than or equal to20eV) and high density (n/sub e//sup div/ )approx equal) n/sub e//sup main/ greater than or equal to 3-10 )times)10/sup 19/ m/sup -3/ at the divertor plates indicate that DIII-D obtains a high-recycling divertor during H-mode. DEGAS neutral transport modeling is consistent with these results; The duration of good H-mode confinement is limited by Edge Localized Modes (ELMs) rather than increasing impurity radiation; The dominant impurities, C and Ni are concentrated in the edge plasma (ra greater than or equal to 0.5) for I/sub p/ greater than or equal to 1 MA; and Global impurity concentrations fall markedly with increasing plasma current. The remainder of this report contains a brief description of the DIII-D tokamak and the relavant diagnostics, a summary of the divertor plasma parameters obtained during the H-mode and the heat loads on the diverotr target plates. The results of measurements of the central radiation and impurity content using data from an EUV spectrometer and a 21 channel bolometer array are discussed, and finally a discussion of the implication of these results for the CIT and ITER tokamak designs is given. 8 refs., 8 figs
Physical Description
21 pages
Notes
NTIS, PC A; 03/MF A01.
Subjects
Keywords
- Confinement
- Divertors
- Doublet Reactors
- Electron Density
- Electron Temperature
- Heat Flux
- Impurities
- Intor Tokamak
- Magnetic Flux
- Plasma Confinement
- Plasma Diagnostics
- Power Density
- Temperature Gradients
- Thermonuclear Reactors
- Tokamak Type Reactors 700201* -- Fusion Power Plant Technology-- Blanket Engineering
STI Subject Categories
Language
Item Type
Identifier
Unique identifying numbers for this report in the Digital Library or other systems.
- Other: DE88008021
- Report No.: UCID-21329
- Grant Number: W-7405-ENG-48
- Digital Object Identifier: https://doi.org/10.2172/5181705
- Office of Scientific & Technical Information Report Number: 5181705
- Archival Resource Key: ark:/67531/metadc1060015
Collections
This report is part of the following collection of related materials.
Office of Scientific & Technical Information Technical Reports
Reports, articles and other documents harvested from the Office of Scientific and Technical Information.
Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.
Digital Files
When
Dates and time periods associated with this report.
Creation Date
- February 26, 1988
Added to The UNT Digital Library
- Jan. 22, 2018, 7:23 a.m.
Description Last Updated
- Jan. 14, 2021, 8:30 p.m.
Usage Statistics
When was this report last used?
Interact With This Report
Here are some suggestions for what to do next.
Start Reading
Citations, Rights, Re-Use
International Image Interoperability Framework
We support the IIIF Presentation API
Print / Share
Links for Robots
Helpful links in machine-readable formats.
Archival Resource Key (ARK)
- ERC Record: /ark:/67531/metadc1060015/?
- Persistence Statement: /ark:/67531/metadc1060015/??
International Image Interoperability Framework (IIIF)
- IIIF Manifest: /ark:/67531/metadc1060015/manifest/
Metadata Formats
- UNTL Format: /ark:/67531/metadc1060015/metadata.untl.xml
- DC RDF: /ark:/67531/metadc1060015/metadata.dc.rdf
- DC XML: /ark:/67531/metadc1060015/metadata.dc.xml
- OAI_DC: /oai/?verb=GetRecord&metadataPrefix=oai_dc&identifier=info:ark/67531/metadc1060015
- METS: /ark:/67531/metadc1060015/metadata.mets.xml
- OpenSearch Document: /ark:/67531/metadc1060015/opensearch.xml
Images
- Thumbnail: /ark:/67531/metadc1060015/thumbnail/
- Small Image: /ark:/67531/metadc1060015/small/
URLs
- In-text: /ark:/67531/metadc1060015/urls.txt
Stats
- Usage Stats: /stats/stats.json?ark=ark:/67531/metadc1060015
Hill, D. N.; Allen, S. L.; Brooks, N. H.; Content, D.; DeBoo, J. C.; Gohil, P. et al. The DIII-D summary contribution to the final INTOR workshop, report, February 26, 1988; California. (https://digital.library.unt.edu/ark:/67531/metadc1060015/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.