Magnetic field alignment studies for the URAGAN-3 torsatron

Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138634· OSTI ID:5608080

Colchin, R J; Harris, J H; Lee, D K; Rome, J A; Fedotov, S I; Ozherel'ev, F I; Pavlichenko, O S; Pogozhev, D P; Zalkind, V M; Treffert, J D

If the major axes of the helical and vertical field coils of a torsatron plasma confinement device are not aligned to within approx. 1% of their major radii, the resulting error field can break up closed magnetic flux surfaces and reduce the effective plasma confinement volume. A novel technique for accurately locating the magnetic symmetry axes of torsatron helical and vertical coil sets to within approx. 1 mm using magnetic field measurements near the device major axis (i.e., away from the confinement volume) is described and applied to the URAGAN-3 torsatron. The axis of the vertical field coil set was found to be shifted by approx. 1 cm relative to the axis of the helical coil set; this shift could account for the reduced confinement volume observed in previous experiments. The magnetic measurements were repeated after coil repositioning to verify correct alignment.

• Research Organization: Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
• DOE Contract Number: AC05-84OR21400; AC02-84ER53166
• OSTI ID: 5608080
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 57:7; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700202* -- Fusion Power Plant Technology-- Magnet Coils & Fields
ALIGNMENT
CLOSED PLASMA DEVICES
CONFINEMENT
ELECTRIC COILS
ELECTRICAL EQUIPMENT
EQUIPMENT
MAGNET COILS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MAGNETIC FLUX
PLASMA CONFINEMENT
STELLARATORS
THERMONUCLEAR DEVICES
URAGAN STELLARATOR