Narrow band Imager for MAST
A narrow band imager for the Multi Application Solar
Telescope (MAST) to be installed at Udaipur Solar Observatory (USO) in the
beginning of 2009 is proposed. The heart of the system is two Fabry-Perot etalons working in tandem. Combining with two
interference filters centered at 6173A and 8542A the
etalons will give a spectral resolution of 54 mA (R =
114 k) and
104 mA (R = 82 k) at the above wavelengths,
respectively. The substrate of the
etalons is made of Lithium Niobate electro-optic
crystal. The refractive index of
the crystal can be changed by applying voltage, and this property is used in
tuning the filter. In this report we present the complete description of a narrow band imager, which could
provide near simultaneous spectral observations in two solar absorption lines
formed at two different heights
(photospheric - FeI
6173A and chromospheric - CaII 8542A line)
in the solar atmosphere.
Imager for MAST proposal is
available HERE
[Contact Shibu
K. Mathew for more details]
[ Developments:
1) Final contract signed for FP with CSIRO
2) Pre-fiters for 617.3 and 854.2 nm purchased from Andover
3) High voltage power supplies for FP purchased from Applied Kilovolts
4) Control interface for dual power supply and software tested with Applied Kilovolts power supply
5) A technical report on high voltage power supply uploaded in Technical Report section [report]]
Last update on 31 March 2010