Abstract


  PROBING THE SOLAR ATMOSPHERE WITH THE INDIAN NATIONAL LARGE SOLAR TELESCOPE (NLST)

  S. Hasan, Indian Institute of Astrophysics, hasan@iiap.res.in

The primary objective of the 2-m National Large Solar Telescope (NLST), proposed by the Indian
Institute of Astrophysics, is to probe the solar atmosphere with high spatial and spectral resolution.
With an innovative optical design, NLST is an on-axis Gregorian telescope with a low number of
optical elements to reduce the number of reflections and yield a high throughput with low
polarization. In addition, it is equipped with a high order adaptive optics that works with a modest
Fried's parameter of 7-cm to produce close to diffraction limited performance.

A major science focus of NLST is to provide insight into various processes occurring in the solar
atmosphere that include: Dynamics of the magnetized photosphere & chromosphere; Activity and
Prominences.

After its completion, currently scheduled for 2019, NLST will fill a gap in longitude between the
major solar facilities in the world. Furthermore, the project welcomes possibilities of international
collaboration in carrying out joint programmes with space and other ground based facilities.