TFTR Mirnov loop system

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

DOI:https://doi.org/10.1063/1.1138746· OSTI ID:5642098

Fredrickson, E; Colchin, R; McGuire, K; Morris, W; Sauthoff, N

Magnetic pick-up loops (Mirnov coils) located on the inner wall of the tokamak fusion test reactor (TFTR) vacuum vessel have been used to study magnetic fluctuations in the plasma. To study the high-frequency magnetic turbulence associated with beam injection, the signal from one coil is passed through a comb filter, which gives a measure of the frequency spectrum throughout the shot. To look for tearing modes, the signals from a poloidal array of 15 coils are summed in an analog system to give the amplitudes of the m-italic = 2, 3, and 4 coherent modes throughout the shot. Additionally, 20 coil signals are digitized individually at a rate of 100 kHz for 80 ms and at 10 kHz for 800 ms. These data may also be analyzed off line to get both the toroidal and poloidal mode numbers as well as the frequency spectrum for a limited portion of the discharge.

• Research Organization: Princeton Plasma Physics Laboratory, Princeton, New Jersey 08544
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5642098
• Journal Information: Rev. Sci. Instrum.; (United States), Vol. 57:8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
MAGNET COILS
OPERATION
PLASMA DIAGNOSTICS
TFTR TOKAMAK
ANALOG SYSTEMS
BEAM INJECTION
CONFIGURATION
DESIGN
DIGITAL SYSTEMS
FILTERS
FLUCTUATIONS
MAGNETIC FIELDS
ORNL
OSCILLATION MODES
PERFORMANCE
PLASMA INSTABILITY
POLOIDAL FIELD DIVERTORS
SIGNAL CONDITIONERS
TURBULENCE
DIVERTORS
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
INSTABILITY
NATIONAL ORGANIZATIONS
PULSE CIRCUITS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS
US AEC
US DOE
US ERDA
US ORGANIZATIONS
VARIATIONS
700102* - Fusion Energy- Plasma Research- Diagnostics