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| Paper: |
On Zeeman Diagnostics with a 4 m Aperture |
| Volume: |
463, 2nd ATST-EAST Workshop in Solar Physics: Magnetic Fields from the Photosphere to the Corona |
| Page: |
337 |
| Authors: |
Kim, I. S.; Alexeeva, I. V.; Suyunova, E. Z. |
| Abstract: |
“Weak” magnetic field diagnostics in faint structures
(prominences, chromosphere, and corona) near the bright solar disk
are discussed. The reliable V-profile recording is shown to
strongly depend on the level of stray light. Calculated
dependencies of the stray light caused by diffraction at the
entrance aperture are presented for several diameters and
wavelengths. The acceptable level of stray light in a 4 m aperture
coronagraph is estimated for a “signal-to-noise” ratio > 3,
when using Hα and Fe XIII 1074.7 nm
lines, a super-smooth primary optics, and a perfect polarimeter. |
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