A fast spectroscopic diagnostic for the measurement of plasma impurity ion dynamics
A high-resolution spectrometer has been developed and used to measure simultaneously impurity ion temperature and flow velocities in high temperature plasmas with 10 {mu}s temporal resolution (limited by digitization rate). This device is actually a duo-spectrometer: measurements from two different chordal views of the plasma can be made simultaneously via two separate quartz input fiber optic bundles coupled to the entrance slits which are tilted to compensate for line curvature. The dispersed spectra on the exit plane of the duo-spectrometer are coupled via quartz fiber optics to two arrays of 16 photomultiplier tubes each. Measurement made by recording the Doppler broadened and shifted 227.091 nm emission from the CV impurity ions in the MST reversed-field pinch (RFP) plasma have achieved precisions of <6 eV for temperatures of 150 Ev and <0.7 km/s for flow velocities of 6 km/s. Representative results from the MsT RFP indicate that the toroidal flow velocity drops and ion temperature increases during saw tooth events in MST.
- Research Organization:
- Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-85ER53198
- OSTI ID:
- 10155525
- Report Number(s):
- DOE/ER/53198-238; ON: DE94012985; BR: AT051011A/AT0530020; TRN: 94:012120
- Resource Relation:
- Other Information: PBD: Apr 1994
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MST DEVICE
ION TEMPERATURE
PLASMA IMPURITIES
SPECTROMETERS
DESIGN
PERFORMANCE
PLASMA DIAGNOSTICS
IONS
VELOCITY
HOT PLASMA
PLASMA DRIFT
SAWTOOTH OSCILLATIONS
700320
700330
PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
PLASMA KINETICS, TRANSPORT, AND IMPURITIES