@inproceedings{06954bf99f254d8786d1cb76a89b44c2,
title = "The low-order wavefront sensor for the PICTURE-C mission",
abstract = "The PICTURE-C mission will fly a 60 cm off-axis unobscured telescope and two high-contrast coronagraphs in successive high-altitude balloon flights with the goal of directly imaging and spectrally characterizing visible scattered light from exozodiacal dust in the interior 1-10 AU of nearby exoplanetary systems. The first flight in 2017 will use a 10-4 visible nulling coronagraph (previously flown on the PICTURE sounding rocket) and the second flight in 2019 will use a 10-7 vector vortex coronagraph. A low-order wavefront corrector (LOWC) will be used in both flights to remove time-varying aberrations from the coronagraph wavefront. The LOWC actuator is a 76-channel high-stroke deformable mirror packaged on top of a tip-tilt stage. This paper will detail the selection of a complementary high-speed, low-order wavefront sensor (LOWFS) for the mission. The relative performance and feasibility of several LOWFS designs will be compared including the Shack-Hartmann, Lyot LOWFS, and the curvature sensor. To test the different sensors, a model of the time-varying wavefront is constructed using measured pointing data and inertial dynamics models to simulate optical alignment perturbations and surface deformation in the balloon environment.",
keywords = "balloon, debris disks, direct imaging, exoplanets, exozodiacal dust, fine pointing, high-contrast imaging, wavefront control",
author = "Mendillo, {Christopher B.} and Joshua Brown and Jason Martel and Howe, {Glenn A.} and Kuravi Hewasawam and Finn, {Susanna C.} and Cook, {Timothy A.} and Supriya Chakrabarti and Douglas, {Ewan S.} and Dimitri Mawet and Olivier Guyon and Garima Singh and Julien Lozi and Cahoy, {Kerri L.} and Marinan, {Anne D.}",
note = "Publisher Copyright: {\textcopyright} 2015 SPIE.; Techniques and Instrumentation for Detection of Exoplanets VII ; Conference date: 10-08-2015 Through 13-08-2015",
year = "2015",
doi = "10.1117/12.2188238",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Stuart Shaklan",
booktitle = "Techniques and Instrumentation for Detection of Exoplanets VII",
}