High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII-D

Conference · Mon Oct 01 00:00:00 EDT 1990

OSTI ID:6503701

Gohil, P; Burrell, K H; Groebner, R J; Seraydarian, R P

In DIII-D, visible spectroscopic measurements of the He II 468.6 nm and C VI 529.2 nm Doppler broadened spectral lines, resulting from charge exchange recombination interactions between beam neutral atoms and plasma ions, are performed to determine ion temperatures, and toroidal and poloidal rotation velocities. The diagnostics system comprises 32 viewing chords spanning a typical minor radius of 63 cm across the midplane, of which 16 spatial chords span 11 cm of the plasma edge just within the separatrix. A temporal resolution of 260 {mu}s per time slice can be obtained as a result of using MCP phosphors with short decay times and fast camera readout electronics. Results from this system will be used in radial electric field comparisons with theory at the L-H transition and ion transport analysis. 6 refs., 3 figs.

• Research Organization: General Atomics, San Diego, CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-89ER51114
• OSTI ID: 6503701
• Report Number(s): GA-A-20105; CONF-900557-23; ON: DE91002718; TRN: 90-035690
• Resource Relation: Conference: 8. topical conference on high-temperature plasma diagnostics, Hyannis, MA (USA), 6-10 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA SCRAPE-OFF LAYER
EMISSION SPECTROSCOPY
CARBON IONS
CHARGE EXCHANGE
DOPPLER BROADENING
DOUBLET REACTORS
HELIUM IONS
ION TEMPERATURE
PLASMA DIAGNOSTICS
RECOMBINATION
SPATIAL RESOLUTION
TEMPERATURE DISTRIBUTION
TIME RESOLUTION
VELOCITY
BOUNDARY LAYERS
CHARGED PARTICLES
IONS
LAYERS
LINE BROADENING
RESOLUTION
SPECTROSCOPY
THERMONUCLEAR REACTORS
TIMING PROPERTIES
TOKAMAK TYPE REACTORS
700102* - Fusion Energy- Plasma Research- Diagnostics