Infrared camera and data-acquisition system in Doublet III

Journal Article · Sat Jun 01 04:00:00 EDT 1985 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1138021· OSTI ID:5466290

Petrie, T W; Scoville, J T

Thermal imaging cameras sensitive to 3--5 ..mu.. radiation are routinely used to measure heat flow to the main limiter, to the vacuum vessel wall behind the main limiter, and to the divertor plate limiters. The cameras are equipped to provide either a standard television image, one frame per approx.16.7 ms, or a surface temperature profile on one line of the image with a time resolution of approx.125 ..mu..s. In the former mode, we can determine both the location and the intensity of the heating on the main limiter during multimegawatt neutral-beam injection into plasma; in the latter mode, we can measure heat pulses striking the limiter from plasma processes occurring on fast timescales (e.g., D/sub ..cap alpha../ spikes of approx.500 ..mu..s duration). Data is stored in both video image and digitized forms. In the latter, a ''peak-sample-hold'' circuit electronically records the maximum signal of each line sweep and stores this data in digitized form on magnetic tape. This facilitates later comparisons of infrared camera data with other diagnostic signals using plotting packages on the DEC-10.

• Research Organization: GA Technologies Inc., P. O. Box 85608, San Diego, California 92138
• DOE Contract Number: AC03-84ER51044
• OSTI ID: 5466290
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 56:6; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102 -- Fusion Energy-- Plasma Research-- Diagnostics
700209* -- Fusion Power Plant Technology-- Component Development & Materials Testing
BEAM INJECTION
BEAM INJECTION HEATING
CAMERAS
DATA ACQUISITION SYSTEMS
DOUBLET-3 DEVICE
HEATING
IMAGES
LIMITERS
NEUTRAL ATOM BEAM INJECTION
OPERATION
PLASMA DIAGNOSTICS
PLASMA HEATING
RESOLUTION
SENSITIVITY
TIME RESOLUTION
TIMING PROPERTIES