Instrument Information
IDENTIFIER urn:nasa:pds:context:instrument:euv.maven::1.1
NAME EXTREME ULTRAVIOLET MONITOR
TYPE ULTRAVIOLET SPECTROMETER
DESCRIPTION The EUV monitor is designed to measure the solar irradiance in three broad bands in the soft xray and extreme ultraviolet wavelength range. It consists of three filter radiometers that each have a limiting aperture, bandpass limiting filter, silicon photodiode detector, and an electrometer to measure the current in the detector. A fourth detector-electrometer combination that is blocked from receiving any light input is used as a ?dark? detector to monitor changes in the thermal and radiation induced background signals. A temperature diode is also included in the EUV instrument. There is also a mechanism to place or remove additional fused silica windows in front of the three science apertures. These filters block the EUV and X-ray sunlight, but still allow longer wavelength light (primarily visible) through into the radiometers. This allows for a measurement of the out-of-band contribution to the signals from the science channels.
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