Configuration control, fluctuations, and transport in low-collisionality plasmas in the ATF Torsatron
Creators
- Harris, J.H.1
- Murakami, M.1
- Baylor, L.R.1
- Bell, J.D.1
- Bigelow, T.S.1
- Carreras, B.A.1
- Colchin, R.J.1
- Crume, E.C. Jr.1
- Dominguez, N.1
- Dory, R.A.1
- Dunlap, J.L.1
- Dyer, G.R.1
- England, A.C.1
- Glowienka, J.C.1
- Hillis, D.L.1
- Hiroe, S.1
- Howe, H.C.1
- Hutchinson, D.P.1
- Isler, R.C.1
- Jernigan, T.C.1
- Langley, R.A.1
- Leboeuf, J.N.1
- Lee, D.K.1
- Lyon, J.F.1
- Ma, C.H.1
- Rasmussen, D.A.1
- Simpkins, J.E.1
- Uckan, T.1
- Vander Sluis, K.L.1
- Wilgen, J.B.1
- Wing, W.R.1
- Aceto, S.2
- Zielinski, J.2
- Branas, B.3
- Hidalgo, C.3
- Ochando, M.A.3
- Sanchez, J.3
- Hanson, G.R.4
- Thomas, C.E.4
- Wade, M.R.4
- Likin, K.M.5
- Sapozhnikov, A.V.5
- Sarksyan, K.A.5
- Shats, M.G.5
- Meier, M.6
- Ritz, C.P.6
- Morimoto, S.7
- Motojima, O.7
- Paul, S.F.8
- 1. Oak Ridge National Lab., TN (USA)
- 2. Rensselaer Polytechnic Inst., Troy, NY (USA)
- 3. Association Euratom-Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, Madrid (Spain)
- 4. Georgia Inst. of Tech., Atlanta, GA (USA)
- 5. AN SSSR, Moscow (USSR). Inst. Obshchey Fiziki
- 6. Texas Univ., Austin, TX (USA). Fusion Research Center
- 7. National Inst. for Fusion Science, Nagoya (Japan)
- 8. Princeton Univ., NJ (USA). Plasma Physics Lab.
Description
In low-collisionality plasmas confined in tokamaks and stellarators, instabilities driven by particles trapped in inhomogeneities of the magnetic fields could be important in increasing plasma transport coefficients. In the Advanced Toroidal Facility (ATF), an ell = 2, M = 12 field-period stellarator device with major radius R = 2.1 m, average plasma minor radius a = 0.27 m, central and edge rotational transforms χ0 ∼ 0.3, χa ∼ 1, the effects of electron trapping in the helical stellarator field are expected to be important in plasmas with bar ne ∼ 5 x 1012 cm-3, Te0 ∼ 1 keV. Such plasmas have already been sustained for long-pulses (20 s) using 150--400 kW of 53.2-GHz ECH power at B = 0.95 T. Transport analysis shows that for ρ = r/a ≤ 1/3, the electron anomalous transport is ≤10 times the neoclassical value, while at ρ = 2/3 it is 10--100 times neoclassical; this is compatible with expectations for transport enhancement due to dissipative trapped-electron modes. 4 refs., 3 figs
Availability note (English)
MF available from INIS under the Report Number; OSTI as DE91010807; NTIS; INIS; US Govt. Printing Office Dep.Files
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Additional details
Publishing Information
- Imprint Pagination
- 6 p.
- Report number
- CONF-910609--6
Conference
- Title
- 18. European conference on controlled fusion and plasma physics.
- Dates
- 3-7 Jun 1991.
- Place
- Berlin (Germany, F.R.).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22061728
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ATF TORSATRON; CHARGED-PARTICLE TRANSPORT; ECR HEATING; FLUCTUATIONS; MAGNETIC FIELDS; QUADRUPOLES; TRAPPED ELECTRONS; TRAPPED-PARTICLE INSTABILITY; TURBULENCE
- Descriptors DEC
- CLOSED PLASMA DEVICES; ELECTRONS; ELEMENTARY PARTICLES; FERMIONS; HEATING; HIGH-FREQUENCY HEATING; INSTABILITY; LEPTONS; MULTIPOLES; PLASMA HEATING; PLASMA INSTABILITY; RADIATION TRANSPORT; STELLARATORS; THERMONUCLEAR DEVICES; TORSATRON STELLARATORS; VARIATIONS
Optional Information
- Contract/Grant/Project number
- Contract AC05-84OR21400
- Funding organization
- USDOE, Washington, DC (USA).