High-contrast imaging at first-light of the GMT: the wavefront sensing and control architecture of GMagAO-X
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| Format: | Preprint |
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2024
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| _version_ | 1866911959362830336 |
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| author | Haffert, Sebastiaan Y. Males, Jared R Close, Laird M. Kautz, Maggie Y. Durney, Olivier Guyon, Olivier |
| author_facet | Haffert, Sebastiaan Y. Males, Jared R Close, Laird M. Kautz, Maggie Y. Durney, Olivier Guyon, Olivier |
| contents | The Giant Magellan Adaptive Optics eXtreme (GMagAO-X) instrument is a first-light high-contrast imaging instrument for the Giant Magellan Telescope (GMT). GMagAO-X's broad wavelength range and the large 25-meter aperture of the GMT creates new challenges: control of all 21.000 actuators; phasing GMT's segmented primary mirror to nm levels; active control of atmospheric dispersion to sub milli-arcsecond residuals; no chromatic pupil shear to minimize chromatic compensation errors; integrated focal plane wavefront sensing and control (WFSC). GMagAO-X will have simultaneous visible and infra-red WFS channels to control the 21.000 actuator DM. The infra-red arm will be flexible by incorporating switchable sensors such as the pyramid or Zernike WFS. One innovation that we developed for GMagAO-X is the Holographic Dispersed Fringe Sensor that measures differential piston. We have also developed several integrated coronagraphic wavefront sensors to control non-common path aberrations exactly where we need to sense them. We will discuss the key components of the WFSC strategies for GMagAO-X that address the challenges posed by the first high-contrast imaging system on the ELTs. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_13021 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-contrast imaging at first-light of the GMT: the wavefront sensing and control architecture of GMagAO-X Haffert, Sebastiaan Y. Males, Jared R Close, Laird M. Kautz, Maggie Y. Durney, Olivier Guyon, Olivier Instrumentation and Methods for Astrophysics Optics The Giant Magellan Adaptive Optics eXtreme (GMagAO-X) instrument is a first-light high-contrast imaging instrument for the Giant Magellan Telescope (GMT). GMagAO-X's broad wavelength range and the large 25-meter aperture of the GMT creates new challenges: control of all 21.000 actuators; phasing GMT's segmented primary mirror to nm levels; active control of atmospheric dispersion to sub milli-arcsecond residuals; no chromatic pupil shear to minimize chromatic compensation errors; integrated focal plane wavefront sensing and control (WFSC). GMagAO-X will have simultaneous visible and infra-red WFS channels to control the 21.000 actuator DM. The infra-red arm will be flexible by incorporating switchable sensors such as the pyramid or Zernike WFS. One innovation that we developed for GMagAO-X is the Holographic Dispersed Fringe Sensor that measures differential piston. We have also developed several integrated coronagraphic wavefront sensors to control non-common path aberrations exactly where we need to sense them. We will discuss the key components of the WFSC strategies for GMagAO-X that address the challenges posed by the first high-contrast imaging system on the ELTs. |
| title | High-contrast imaging at first-light of the GMT: the wavefront sensing and control architecture of GMagAO-X |
| topic | Instrumentation and Methods for Astrophysics Optics |
| url | https://arxiv.org/abs/2407.13021 |