Title :
Calibration of spatially nonuniform sensitivity for a spectral line emission measuring system
Author :
Xu, Guoxiang ; Haydon, S.C. ; Hugrass, Waheed N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Clarkson Univ., Potsdam, NY, USA
fDate :
12/1/1994 12:00:00 AM
Abstract :
An apparatus for space- and time-resolved measurements of the spectral line emission from glow discharge plasmas is described. It utilizes two stages of microchannel plate image intensifiers and a computer-assisted data acquisition system. The image intensifiers have a significant level of dark noise, and their sensitivity is spatially nonuniform. The effect of the dark noise is reduced significantly by signal averaging. A calibration procedure using a movable stable source is followed so that quantitative measurements can be obtained despite the spatial nonuniformity
Keywords :
calibration; computerised instrumentation; data acquisition; image intensifiers; image processing; microchannel plates; plasma diagnostics; spectroscopy computing; time resolved spectroscopy; computer-assisted data acquisition; dark noise; glow discharge plasmas; microchannel plate image intensifiers; movable stable source; quantitative measurements; sensitivity; signal averaging; space-resolved measurements; spatial nonuniformity; spatially nonuniform sensitivity; spectral line emission; spectral line emission measuring system; time-resolved measurements; Calibration; Electrodes; Glow discharges; Image intensifiers; Microchannel; Plasma applications; Plasma confinement; Plasma diagnostics; Plasma measurements; Plasma properties;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
