Instrument Information
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| IDENTIFIER |
urn:nasa:pds:context:instrument:euv.maven::1.1
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| NAME |
EXTREME ULTRAVIOLET MONITOR
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| TYPE |
ULTRAVIOLET SPECTROMETER
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| DESCRIPTION |
The EUV monitor is designed to measure the solar irradiance in three broad bands in the soft x-ray 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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