[
    {
        "id": "authors:ez8s6-r9906",
        "collection": "authors",
        "collection_id": "ez8s6-r9906",
        "cite_using_url": "https://authors.library.caltech.edu/records/ez8s6-r9906",
        "type": "conference_item",
        "title": "High-contrast spectroscopy testbed (HCST): tip/tilt sensing in reflection of the vector vortex coronagraph (VVC)",
        "author": [
            {
                "family_name": "Bertrou-Cantou",
                "given_name": "Arielle",
                "clpid": "Bertrou-Cantou-Arielle"
            },
            {
                "family_name": "Redmond",
                "given_name": "Susan F.",
                "orcid": "0000-0002-9618-4371",
                "clpid": "Redmond-Susan-F"
            },
            {
                "family_name": "Mawet",
                "given_name": "Dimitri",
                "orcid": "0000-0002-8895-4735",
                "clpid": "Mawet-D"
            },
            {
                "family_name": "Sercel",
                "given_name": "Greg P.",
                "clpid": "Sercel-Greg-P"
            },
            {
                "family_name": "Echeverri",
                "given_name": "Daniel",
                "orcid": "0000-0002-1583-2040",
                "clpid": "Echeverri-D"
            },
            {
                "family_name": "Desai",
                "given_name": "Niyati",
                "orcid": "0000-0002-2843-8325",
                "clpid": "Desai-Niyati"
            },
            {
                "family_name": "Llop-Sayson",
                "given_name": "Jorge",
                "orcid": "0000-0002-3414-784X",
                "clpid": "Llop-Sayson-Jorge"
            },
            {
                "family_name": "Ruane",
                "given_name": "Garreth",
                "orcid": "0000-0003-4769-1665",
                "clpid": "Ruane-G-J"
            },
            {
                "family_name": "Serabyn",
                "given_name": "Eugene",
                "orcid": "0009-0009-2491-0694",
                "clpid": "Serabyn-Eugene"
            },
            {
                "family_name": "Wallace",
                "given_name": "James Kent",
                "orcid": "0000-0001-5299-6899",
                "clpid": "Wallace-J-Kent"
            }
        ],
        "editor": [
            {
                "family_name": "Coyle",
                "given_name": "Laura E."
            },
            {
                "family_name": "Perrin",
                "given_name": "Marshall D."
            },
            {
                "family_name": "Matsuura",
                "given_name": "Shuji"
            }
        ],
        "abstract": "<p>With the identified objective of enabling Earth-like exoplanets direct detection, and characterization of their atmospheric content, the Astro2020 report has placed the maturation of exoplanet imaging technology as a key priority for the coming decade. The High Contrast Spectroscopy Testbed (HCST) within the Caltech Exoplanet Technology laboratory serves as an in-air coronagraphic testbed demonstrator, integrating a high order deformable mirror for wavefront control and a vector vortex coronagraph (VVC). HCST has demonstrated excellent in-air contrast performance, achieving 1 &times; 10<span><span>\u207b<span>\u2078</span></span></span> raw contrast in broadband light, for both the apodized off-axis segmented pupil configuration and using single mode fiber planet injection. By introducing a low-order wavefront sensor (WFS) that utilizes either the in-band or out-of-band reflected light from the VVC coupled with a tip/tilt mirror, our objective is to address dynamic errors, thereby enhancing the wavefront stability of the experiment. We present in this proceeding the first steps towards a full tip/tilt control loop, starting with the optical design of our low-order camera. We performed a drift test overnight as a diagnostic of the coronagraphic performance stability and to possibly identify causes for the drift. Conclusions show that HCST demonstrate a remarkably stable environment to perform high-contrast imaging experiments, at the level of 1 &times; 10<span><span>\u207b<span>\u2078</span></span></span> contrast.</p>",
        "doi": "10.1117/12.3019237",
        "isbn": "9781510675070",
        "publisher": "SPIE",
        "place_of_publication": "Bellingham, WA",
        "publication": "Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave",
        "publication_date": "2024-08-23",
        "pages": "130926B"
    }
]