Browsing IIAP Master's Theses by Issue Date

Capacitive edge sensor and sensor electronics for segmented mirror telescopes

Sreekanth Reddy, V (Indian Institute of Astrophysics, 2014-08)

Edge sensors are high precision displacement sensors used in segmented mirror telescope to measure relative displacement between two mirror segments. An edge sensor based on parallel plate capacitor is being used in Keck ...

Analytical modelling of Thirty Meter Telescope polarization

Ramya, M. Anche (Indian Institute of Astrophysics, 2014-08)

The polarization introduced due to TMT telescope optics is studied using an analytical model. Mueller matrices are also generated for each optical element using Zemax based on which the instrumental polarization due to ...

Development of cross-polarized log-periodic dipole antenna for low frequency radio spectral observations

Anshu Kumari (Indian Institute of Astrophysics, 2015-07)

The solar coronal mass ejections (CMEs) play a direct and vital role in deciding the space weather, so it becomes inevitable to study their dynamical properties in the lower corona (i.e., over the radial distance range: ...

Towards radial velocity measurements with iodine absorption cell on VBT Echelle Spectrograph

Sireesha, C (Indian Institute of Astrophysics, 2015-08)

Essentially all information about astronomical objects outside the solar system reach us via light, i.e., the electromagnetic radiation. White light is composed of many wavelengths which are not resolved into their ...

Edge sensor for segmented mirror telescopes

Varun Kumar (Indian Institute of Astrophysics, 2015-08)

To address key research problems of astronomy, a large aperture telescope has become a need for every astronomical group around the globe. Optical telescopes with single monolithic primary mirror of 8m and above aperture ...

Mid-infrared imager for the 2m Himalayan Chandra Telescope: feasibility, conceptual design and roadmap for implementation

Anwesh Kumar, M (Indian Institute of Astrophysics, 2015-08)

Ground based observations in the Mid-infrared wavelength range has the advantages of greater penetrating power through interstellar gas and dust, ability to observe cooler objects, and less effect of atmospheric turbulence. ...

High precision full stokes spectropolarimetry of the sun as a star instrument design aspects

Souvik Bose (Indian Institute of Astrophysics, 2016-07)

The sun is very interesting particularly because it is very dynamic. The magnetic field plays a major role in governing dynamics of the sun. Many interesting features like sunspots, flares, prominences, and Coronal Mass ...

Optical Design of the Dual Beam Imaging Polarimeter (DBIP) for the 1.3m JCB telescope in Kavalur

Pavankumar, K (Indian Institute of Astrophysics, 2016-07)

Imaging Polarimetry of Extended sources is not very common. This project entitled "Dual Beam Imaging Polarimeter" is an attempt to build one for the 1.3m telescope in Kavalur. The Instrument will make use of the Wide field ...

Instrument design for the observation of the sun at near IR wavelengths: (around 1.6 µ)

Aritra Chakrabarty (Indian Institute of Astrophysics, 2016-07)

The H minus ions prevalent in the sub-photospheric level are found to have minimum opacity at around 1.63 m which makes this wavelength suitable for sub-photospheric observations . Some previous observations by Foukal ...

Development of Image Stabilization System for the Kodaikanal Tower Telescope

Shanti Prabha, C (Indian Institute of Astrophysics, 2018-07)

This M. Tech. project is a part of IIA’s internal project of developing and demonstrating a solar adaptive optics system. The Earth’s turbulent atmosphere distorts the light wave-fronts passing through it and thus impairs ...

Development of radio antenna array and receiver system for observations of Pulsars at Low Radio Frequencies

Bane Kshitij, Suhas Trupti (Indian Institute of Astrophysics, 2019-06)

A pulsar is a highly magnetized rapidly rotating neutron star. Weighing more than our Sun, yet only about 20 km in diameter, these incredibly dense objects produce radio beams that sweep the sky like a lighthouse. Pulsars ...

Calibration of spectral channels for VELC onboard ADITYA-L1 and preparing data pipeline

Madhu, Vishnu (Indian Institute of Astrophysics, 2019-06)

ADITYA-L1 will be India’s first space mission dedicated to solar studies. The Visible Emission Line Coronagraph (VELC) is one of the prime payloads onboard ADITYA L1. VELC will perform simultaneous imaging, spectroscopy ...

Single shot solar spectroscopic design aspects

Mathur, Harsh (Indian Institute of Astrophysics, 2019-06)

High time-cadence Spectro-Polarimetry allows the feasibility of studying magnetic field evolution coupled with the plasma flows. Such a high cadence solar spectro-polarimetry if developed will allow one to study magnetic ...

Study and design of a soft X-ray imager and spectrometer for observation of non-flaring Sun

Choudhary, Sarthak (Indian Institute of Astrophysics, 2019-06)

The outer most layer of the Sun, also called Corona, reaches temperatures as high as a few million Kelvin much hotter than underlying photosphere and chromosphere. This phenomenon is popularly known as coronal heating. ...

Study on the effects of mount induced errors, temperature induced errors and basic alignment errors of TMT primary mirror segments on the image quality using PSSN metric

Bandyopadhyay, Soumya (Indian Institute of Astrophysics, 2019-06)

Thirty meter telescope is one of the new class of extremely large telescopes which have a segmented primary mirror of thirty meter of total aperture that consists of 492 hexagonal segments. Several error sources like ...

Development of 6U spectrograph payload for NUV studies

Bharat Chandra, P (Indian Institute of Astrophysics, 2019-06)

A pulsar is a highly magnetized rapidly rotating neutron star. Weighing more than our Sun, yet only about 20 km in diameter, these incredibly dense objects produce radio beams that sweep the sky like a lighthouse. Pulsars ...

Calibration of subsystems of visible emission line coronagraph

Pruthvi, Suryadevara (Indian Institute of Astrophysics, 2019-07)

Aditya-L1, India’s first mission with multiple science payloads is designed to study the solar dynamics. Aditya-L1 includes multiple payloads, the significant one being the Visible Emission Line Coronagraph (VELC). ...

Study on phasing of segmented mirrors using the dispersed fringe technique

Dharmadhikari, Radhika (Indian Institute of Astrophysics, 2020-07)

The segmented mirror technology is being extensively used these days in astronomical telescopes, in order to achieve higher resolution and sensitivity with lower manufacturing costs. To make the segments work like a ...

Prototype tracking system for observing the Sun at decimeter and meter wavelengths

Saraswathi Kalyani, S (Indian Institute of Astrophysics, 2020-07)

The outer atmosphere of the Sun is understood to be a very hot plasma medium. The frequency of the electromagnetic emission from a hot plasma medium depends on its electron density distribution. Since the electron density ...

Design aspects of multi-slit spectropolarimeter for national large solar telescope

Khan, Raveena (Indian Institute of Astrophysics, 2020-07)

Magnetic field aids in coupling between different layers of the solar atmosphere. The magnetic field information simultaneously at multiple heights is important to understand many physical processes like flares, coronal ...

Browsing IIAP Master's Theses by Issue Date

Browsing IIAP Master's Theses by Issue Date

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