Formation of linear high-beta heliacs in a 3-meter theta pinch
Description
The formation and equilibrium of linear heliac in a 3-m, low-comoression, 90 KV, 15 KJ theta pinch are investigated. The axis of the segmented circular compression coil has a helical offset of 2 cm an axial helical period of 40 cm. Added to this l=1 stellator configuration is a straight axial current-carrying ''hardcore'' conductor to produce doubly connected flux surfaces: circular about the hardcore, and bean-shaped about the helical axis. Internal magnetic probes are used to determine the heliac flux-surface and plasma-pressure distributions. Different pressure distributions over the inner hard-core and outer bean shaped flux surfaces, are shown. Maximum beta values are typically 0.7. Unlike the case of the l=1 stellarator there is little indication of MHD mode activity of these heliac quasiequilibria. (author)
Availability note (English)
Available from the Library of Comissao Nacional de Energia Nuclear, RJ, Brazil.Abstract (Portuguese)
Investigam-se a formacao e equilibrio de um heliaco linear em um teta pinch de 15 KJ, 90 KV, baixa compressao de 3-m. O eixo da bobina de compressao circular segmentada possui uma impressao heliacal de 2 cm com um periodo heliacal de 2 cm com um periodo heliacal axial de 40 cm. Incluiu-se a configuracao estreladora l=1 um condutor de nucleo duro portador de corrente axial paralelo para produzir superficies de fluxo conectadas duplamente: circular em torno do nucleo duro, e em forma de feijao em torno do eixo helicoidal. Sondas magneticas interna sao usadas para determinar as distribuicoes de superficies de fluxo helicoidal e pressao do plasma. Mostram-se diferentes distribuicoes de pressao sobre as superficies do nucleo duro e do fluxo em forma de feijao. Valores de beta maximo sao tipicamente de 0,7. Ao contrario do estrelador l=1 existe uma pequena indicacao da atividade do modo MHD destes quase equilibrios helicoidais. (M.C.K.)Additional details
Publishing Information
- Imprint Title
- Proceedings of the Energy Independence Conference: Fusion Energy and Plasma Physics
- Imprint Pagination
- 892 p.
- Journal Page Range
- p. 112-121.
Conference
- Title
- Fusion Energy and Plasma Physics.
- Acronym
- Energy Independence Conference
- Dates
- 17-21 Aug 1987.
- Place
- Rio de Janeiro, RJ (Brazil).
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 20050400
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- BETA RATIO; MAGNETIC COMPRESSION; MAGNETIC PROBES; MAGNETOHYDRODYNAMICS; PLASMA DIAGNOSTICS; PLASMA PRESSURE; THETA PINCH
- Descriptors DEC
- COMPRESSION; FLUID MECHANICS; HYDRODYNAMICS; MECHANICS; PINCH EFFECT; PROBES