Abstract
ABSTRACT ELECTRONIC SYSTEMS FOR THE NEW MULTICHANNEL SPECTROMETER AT SACRAMENTO PEAK* ROBERT W. HOBBS, GARY D. HARRIS, AND GABRIEL EPSThIN Advanced Systems and Ground Observations Branch, Laboratory for Solar Physics NASA-Goddard Space Flight Center, Greenbelt Received 29 October 1971 The NASA-GSFC Laboratory for Solar Physics is collaborating with the Sacramento Peak Observatory in the development and operation of a multichannel solar spectrometer designed by R. B. Dunn. This instrument will be used for ground-based observations of active regions whose X-ray and EUV emissions are studied by the OSO-H and other satellites. The electronic systems associated with the instrument include an electro-optical guider controlled by a punched paper tape capable of making raster scans of selected portions of the solar disk, a programmer unit that applies paper-tape commands to various portions of the instrument, a closed-loop servo system for the vacuum heliostat, stepping motor controls for spectral scans, a 40-channel photomultiplier readout, and a magnetometer. Preliminary solar observations indicate satisfactory performance of the system. Key words: instrumentation - spectrometer
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