Preparation of AO-related observations and post-processing recipes for E-ELT HARMONI-SCAO

• Type: Article in International Conference Proceedings Book
• Date: 2016

Authors

Schwartz, N (Author) Other; Sauvage, JF (Author) Other; Neichel, B (Author) Other; Correia, C (Author) Other; Blanco, L (Author) Other; Fusco, T (Author) Other; Pecontal Rousset, A (Author) Other; Jarno, A (Author) Other; Piqueras, L (Author) Other; Dohlen, K (Author) Other; El Hadi, K (Author) Other; Thatte, N (Author) Other; Bryson, I (Author) Other; Clarke, F (Author) Other; Schnetler, H (Author) Other

Conference proceedings International

Title: ADAPTIVE OPTICS SYSTEMS V

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Other information

Authenticus ID: P-014-ZCV

DOI: 10.1117/12.2231291

Abstract (EN): HARMONI is a visible and near-infrared integral field spectrograph designed to be a first-light instrument on the European extremely large telescope. It will use both single-conjugate and laser tomographic adaptive optics to fully exploit high-performance and sky coverage. Using a fast AO modelling toolbox, we simulate anisoplanatism effects on the point spread function of the single-conjugate adaptive optics of HARMONI. We investigate the degradation of the correction performance with respect to the off-Axis distance in terms of Strehl ratio and ensquared energy. In addition, we analyse what impact the natural guide source magnitude, AO sampling frequency and number of sub-Apertures have on performance. We show, in addition to the expected PSF degradation with the field direction, that the PSF retains a coherent core even at large off-Axis distances. We demonstrated the large performance improvement of fine tuning the sampling frequency for dimer natural guide stars and an improvement of approx. 50% in SR can be reached above the nominal case. We show that using a smaller AO system with only 20x20 sub-Apertures it is possible to further increase performance and maintain equivalent performance even for large off-Axis angles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10