Design & Fabrication of an Experimental set-up for the Solar Corona Studies during Total Solar Eclipse :
R.D. Tewari, K. Ramankutty, Anand Oka, A.M. Narsale
An experimental set-up consisting of i) Fabry-Perot Interferometer with an interference filter with 7 A0 bandwidth centered at l = 5303 A0, ii) a lens (L1) to recollimate light passing through the filter (D = 66.66 mm, F = 80mm, f/1.2), iii) Camera lens (L2) for imaging. (D = 45.833 mm, F = 55mm, f/1.2), iv) Mercury lamp to calibrate instrument and to determine instrumental profile, was designed and fabricated to (a) measure the Large scale Mass flows in Solar Corona by using Doppler shift, (b) determine the temperature distribution and velocity field in solar corona during the total solar eclipse of 22nd July 2009, for the M.Sc. students of Department of Astro-Physics, University of Mumbai and Helios Astronomy Group, Mumbai. The set up was found to be extremely useful by these students in performing their experiments on Solar Corona studies. The experiment was conducted in Hawgzhou & Wuhan cities of China. Prof. A.M. Narsale and Dr. R.D. Tewari delivered invited talks in this regard at the Cultural Centre of Russia on 10th July 2009.