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- The Solar Ultraviolet Measurements of Emitted Radiation (SUMER) on SOHO:
- measure profiles and intensities of extreme ultraviolet (EUV) lines emitted
in the solar atmosphere ranging from the upper chromosphere to the lower
corona;
- determine line broadenings, spectral positions and Doppler shifts with high
precision and accuracy;
- provide stigmatic images of selected areas of the Sun in the EUV with high
spatial, temporal and spectral resolution and
- obtain full images of the Sun and the inner corona in selectable EUV lines,
corresponding to a temperature range from 10 000 to 2 000 000 K.
The optical design is based upon two parabolic mirrors, a plane mirror and a
spherical concave grating, all made of silicon carbide. The first off-axis
telescope parabola mirrors the Sun on the spectrometer entrance slit. The
second off-axis parabola collimates the beam leaving the slit. This beam is
then deflected by the plane mirror onto the grating. Two detectors, located in
the focal plane of the grating, collect the monochromatic images of the
spectrometer entrance slit. Coverage of the full spectral range of the
instrument requires a wavelength scan performed by rotating the plane mirror. A
baffle system, consisting of an entrance aperture, light traps, an aperture
stop, a pre-slit and a Lyot stop, completes the design.
For more information, see:
http://www.mps.mpg.de/projects/soho/sumer
Group: Instrument_Details
Entry_ID: SUMER
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Ultraviolet Instruments
Short_Name: SUMER
Long_Name: Solar Ultraviolet Measurements of Emitted Radiation
End_Group
Group: Associated_Platforms
Short_Name: SOHO
End_Group
Group: Spectral_Frequency_Information
Wavelength_Keyword: Ultraviolet
Number_Channels: 2
Spectral_Frequency_Coverage_Range: 390 - 1500 A
End_Group
Online_Resource: http://www.mps.mpg.de/projects/soho/sumer/text/webluca/ch_inst.html
Sample_Image: http://www.mps.mpg.de/projects/soho/sumer/text/webluca/sumopt.jpg
Group: Instrument_Logistics
Instrument_Start_Date: 1995-12-02
Instrument_Owner: Max Planck Institute for Solar System Research
End_Group
End_Group
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