eprintid: 23759
rev_number: 15
eprint_status: archive
userid: 3443
dir: disk0/00/02/37/59
datestamp: 2017-12-05 14:29:06
lastmod: 2017-12-11 09:33:37
status_changed: 2017-12-05 14:29:06
type: doctoralThesis
metadata_visibility: show
creators_name: Radhakrishnan Santhakumari, Kalyan Kumar
title: Maximizing The Science Returns Of The LINC-NIRVANA Multi-Conjugated Adaptive Optics System
subjects: 520
subjects: 530
divisions: 130200
adv_faculty: af-13
abstract: Earth's fully turbulent atmosphere prevents ground-based optical and near-infrared telescopes (larger than 30 cm) to reach their full potential, i.e. their diffraction-limited capabilities. In order to overcome this limitation, real-time correction of the aberrations caused by the atmosphere is essential. This is done using a technique called Adaptive Optics (AO). Achieving wide-field correction requires an extension to this technique known as Multi-Conjugated Adaptive Optics (MCAO). My PhD concentrated on max- imising the scientific return of one such MCAO system, the LINC-NIRVANA (LN) instrument currently undergoing commissioning at the Large Binocular Telescope. Starting from alignment and calibration in the lab to the on-going commissioning, I have contributed to the optical assembly, integration, verifica- tion, and software development of the LN MCAO system. I also solved a particular challenge faced by the MCAO systems, namely the "partial illumination issue". In addition, I also developed a concept that can improve the AO performance, which we call as the "wind predictive control". Finally, to understand the astrophysical capabilities of an AO system, I studied a pre-main sequence star system, the T Tauri, using observations from two instruments with advanced AO systems capable of providing high-contrast high-resolution near-infrared imagery.
date: 2017
id_scheme: DOI
id_number: 10.11588/heidok.00023759
ppn_swb: 1657379795
own_urn: urn:nbn:de:bsz:16-heidok-237590
date_accepted: 2017-11-22
advisor: HASH(0x556119a20760)
language: eng
bibsort: RADHAKRISHMAXIMIZING2017
full_text_status: public
place_of_pub: Heidelberg, Germany
citation:   Radhakrishnan Santhakumari, Kalyan Kumar  (2017) Maximizing The Science Returns Of The LINC-NIRVANA Multi-Conjugated Adaptive Optics System.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/23759/1/KalyanKumarRadhakrishnanSanthakumari_PhDThesis_09Oct2017.pdf