High poloidal beta equilibria in TFTR limited by a natural inboard poloidal field null
Description
Recent operation of the Tokamak Fusion Test Reactor TFTR, has produced plasma equilibria with values of {Lambda} {triple bond} {beta}{sub p eq} + l{sub i}/2 as large as 7, {epsilon}{beta}{sub p dia} {triple bond} 2{mu}{sub 0}{epsilon}<p{perpendicular}>/{much lt}B{sub p}{much gt}{sup 2} as large as 1.6, and Troyon normalized diamagnetic beta, {beta}{sub N dia} {triple bond} 10{sup 8}<{beta}{sub t}{perpendicular}>aB{sub 0}/I{sub p} as large as 4.7. When {epsilon}{beta}{sub p dia} {approx gt} 1.25, a separatrix entered the vacuum chamber, producing a naturally diverted discharge which was sustained for many energy confinement times, {tau}{sub E}. The largest values of {epsilon}{beta}{sub p} and plasma stored … continued below
Physical Description
32 pages
Creation Information
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
- Sabbagh, S. A.
- Gross, R. A.
- Mauel, M. E.
- Navratil, G. A. (Columbia Univ., New York, NY (United States). Dept. of Applied Physics)
- Bell, M. G.
- Bell, R.
- Bitter, M.
- Bretz, N. L.
- Budny, R. V.
- Bush, C. E.
- Chance, M. S.
- Efthimion, P. C.
- Fredrickson, E. D.
- Hatcher, R.
- Hawryluk, R. J.
- Hirshman, S. P.
- Janos, A. C.
- Jardin, S. C.
- Jassby, D. L.
- Manickam, J.
- McCune, D. C.
- McGuire, K. M.
- Medley, S. S.
- Mueller, D.
- Nagayama, Y.
- Owens, D. K.
Sponsor
- United States. Department of Energy. DOE; USDOE, Washington, DC (United States)
Publisher
-
Princeton University. Plasma Physics Laboratory.
Publisher Info: Princeton Univ., NJ (United States). Plasma Physics Lab.Place of Publication: New Jersey
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
Recent operation of the Tokamak Fusion Test Reactor TFTR, has produced plasma equilibria with values of {Lambda} {triple bond} {beta}{sub p eq} + l{sub i}/2 as large as 7, {epsilon}{beta}{sub p dia} {triple bond} 2{mu}{sub 0}{epsilon}<p{perpendicular}>/{much lt}B{sub p}{much gt}{sup 2} as large as 1.6, and Troyon normalized diamagnetic beta, {beta}{sub N dia} {triple bond} 10{sup 8}<{beta}{sub t}{perpendicular}>aB{sub 0}/I{sub p} as large as 4.7. When {epsilon}{beta}{sub p dia} {approx gt} 1.25, a separatrix entered the vacuum chamber, producing a naturally diverted discharge which was sustained for many energy confinement times, {tau}{sub E}. The largest values of {epsilon}{beta}{sub p} and plasma stored energy were obtained when the plasma current was ramped down prior to neutral beam injection. The measured peak ion and electron temperatures were as large as 24 keV and 8.5 keV, respectively. Plasma stored energy in excess of 2.5 MJ and {tau}{sub E} greater than 130 msec were obtained. Confinement times of greater than 3 times that expected from L-mode predictions have been achieved. The fusion power gain. Q{sub DD}, reached a values of 1.3 {times} 10{sup {minus}3} in a discharge with I{sub p} = 1 MA and {epsilon}{beta}{sub p dia} = 0.85. A large, sustained negative loop voltage during the steady state portion of the discharge indicates that a substantial non-inductive component of I{sub p} exists in these plasmas. Transport code analysis indicates that the bootstrap current constitutes up to 65% of I{sup p}. Magnetohydrodynamic (MHD) ballooning stability analysis shows that while these plasmas are near, or at the {beta}{sub p} limit, the pressure gradient in the plasma core is in the first region of stability to high-n modes. 24 refs., 10 figs.
Physical Description
32 pages
Notes
OSTI; NTIS; INIS; GPO Dep.
Subjects
Keywords
- Ballooning Instability
- Baryons
- Beam Injection
- Confinement
- Confinement Time
- Elementary Particles
- Equilibrium
- Fermions
- Hadrons
- High-Beta Plasma
- Instability
- Mhd Equilibrium
- Neutral Atom Beam Injection
- Neutrons
- Non-Inductive Current Drive
- Nucleons
- Plasma
- Plasma Confinement
- Plasma Instability
- Plasma Macroinstabilities
- Pressure Gradients
- Tftr Tokamak
- Thermonuclear Reactors
- Tokamak Type Reactors 700101* -- Fusion Energy-- Plasma Research-- Confinement, Heating, & Production
STI Subject Categories
Language
Item Type
Identifier
Unique identifying numbers for this report in the Digital Library or other systems.
- Other: DE91016214
- Report No.: PPPL-2775
- Grant Number: AC02-76CH03073
- Digital Object Identifier: https://doi.org/10.2172/5440464
- Office of Scientific & Technical Information Report Number: 5440464
- Archival Resource Key: ark:/67531/metadc1069605
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
- July 1, 1991
Added to The UNT Digital Library
- Feb. 4, 2018, 10:51 a.m.
Description Last Updated
- Sept. 9, 2020, 1:13 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/metadc1069605/?
- Persistence Statement: /ark:/67531/metadc1069605/??
International Image Interoperability Framework (IIIF)
- IIIF Manifest: /ark:/67531/metadc1069605/manifest/
Metadata Formats
- UNTL Format: /ark:/67531/metadc1069605/metadata.untl.xml
- DC RDF: /ark:/67531/metadc1069605/metadata.dc.rdf
- DC XML: /ark:/67531/metadc1069605/metadata.dc.xml
- OAI_DC: /oai/?verb=GetRecord&metadataPrefix=oai_dc&identifier=info:ark/67531/metadc1069605
- METS: /ark:/67531/metadc1069605/metadata.mets.xml
- OpenSearch Document: /ark:/67531/metadc1069605/opensearch.xml
Images
- Thumbnail: /ark:/67531/metadc1069605/thumbnail/
- Small Image: /ark:/67531/metadc1069605/small/
URLs
- In-text: /ark:/67531/metadc1069605/urls.txt
Stats
- Usage Stats: /stats/stats.json?ark=ark:/67531/metadc1069605
Sabbagh, S. A.; Gross, R. A.; Mauel, M. E.; Navratil, G. A. (Columbia Univ., New York, NY (United States). Dept. of Applied Physics); Bell, M. G.; Bell, R. et al. High poloidal beta equilibria in TFTR limited by a natural inboard poloidal field null, report, July 1, 1991; New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc1069605/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.