Ion heating and MHD dynamo fluctuations in the reversed field pinch

Technical Report · Wed Jan 01 00:00:00 EST 1992

DOI:https://doi.org/10.2172/10107622· OSTI ID:10107622

Scime, E; Hokin, S; Watts, C; Mattor, N

Ion temperature measurements, time resolved to 10 {mu}s, have been made in the Madison Symmetric Torus reversed-field pinch with a five channel charge exchange analyzer. The ion temperature, T{sub i} {approx} 200 eV for I = 350 kA, increases by as much as 100% during discrete dynamo bursts in MST discharges. Magnetic field fluctuations in the range 0.5--5 MHz were also measured. Structure in the fluctuation frequency spectrum at the ion cyclotron frequency appears as the bursts terminate, suggesting that the mechanism of ion heating involves the dissipation of dynamo fluctuations at ion gyro-orbit scales.

• Research Organization: Univ. of Wisconsin, Madison, WI (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-85ER53198
• OSTI ID: 10107622
• Report Number(s): DOE/ER/53198-185; ON: DE92005229
• Resource Relation: Other Information: PBD: Jan 1992
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
REVERSE-FIELD PINCH
PLASMA HEATING
ION TEMPERATURE
TEMPERATURE MEASUREMENT
MHD EQUILIBRIUM
MAGNETIC FIELDS
ICR HEATING
FLUCTUATIONS
PLASMA DIAGNOSTICS
700350
700320
PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS
PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION