Locked modes and magnetic field errors in MST

Technical Report · Mon Jun 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/5187787· OSTI ID:5187787

Almagri, A F; Assadi, S; Prager, S C; Sarff, J S; Kerst, D W

In the MST reversed field pinch magnetic oscillations become stationary (locked) in the lab frame as a result of a process involving interactions between the modes, sawteeth, and field errors. Several helical modes become phase locked to each other to form a rotating localized disturbance, the disturbance locks to an impulsive field error generated at a sawtooth crash, the error fields grow monotonically after locking (perhaps due to an unstable interaction between the modes and field error), and over the tens of milliseconds of growth confinement degrades and the discharge eventually terminates. Field error control has been partially successful in eliminating locking.

• Research Organization: Wisconsin Univ., Madison, WI (United States). Dept. of Physics
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-85ER53198
• OSTI ID: 5187787
• Report Number(s): DOE/ER/53198-197; ON: DE92015379
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700340* -- Plasma Waves
Oscillations
& Instabilities-- (1992-)
ERRORS
INSTABILITY
MAGNETIC FIELDS
MODE LOCKING
OSCILLATION MODES
OSCILLATIONS
PINCH EFFECT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
REVERSE-FIELD PINCH
SAWTOOTH OSCILLATIONS
TEARING INSTABILITY