New approach to cryogenic optical testing the James Webb Space Telescope

Feinberg, Lee; Hagopian, John G.; Diaz, Charles

doi:10.1117/12.660396

Cited by 8 publications

(5 citation statements)

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“…Throughout the development phase, the PIT independently reviewed all aspects of the optics program, especially the integration and test campaign with its direct ties to the verification plans. The early test concepts matured and improved significantly over time with input from the optical PIT (e.g., Feinberg et al 2006). In cases where performance predictions threatened requirements, the JWST science requirements advisory board was convened, with representation from the JWST Science Working Group, to evaluate the science impacts.…”

Section: Telescope Developmentmentioning

confidence: 99%

The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

McElwain

Feinberg

Perrin

et al. 2023

PASP

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The James Webb Space Telescope (JWST) is a large, infrared space telescope that has recently started its science program which will enable breakthroughs in astrophysics and planetary science. Notably, JWST will provide the very first observations of the earliest luminous objects in the universe and start a new era of exoplanet atmospheric characterization. This transformative science is enabled by a 6.6 m telescope that is passively cooled with a 5 layer sunshield. The primary mirror is comprised of 18 controllable, low areal density hexagonal segments, that were aligned and phased relative to each other in orbit using innovative image-based wave front sensing and control algorithms. This revolutionary telescope took more than two decades to develop with a widely distributed team across engineering disciplines. We present an overview of the telescope requirements, architecture, development, superb on-orbit performance, and lessons learned. JWST successfully demonstrates a segmented aperture space telescope and establishes a path to building even larger space telescopes.

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Section: Telescope Developmentmentioning

confidence: 99%

The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

McElwain

Feinberg

Perrin

et al. 2023

PASP

Self Cite

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“…Detailed discussions of the issues and trades involved in developing the current concept can be found in earlier SPIE proceedings. 14,15 It is important to note that it is the OTIS (OTE + ISIM) that is tested in the JSC chamber, not the full JWST observatory. The flight Sunshield and Spacecraft are not present in this test.…”

Section: Otis Cryo-vacuum Testing At Jscmentioning

confidence: 99%

The integration and test program of the James Webb Space Telescope

Kimble

Davila

Diaz

et al. 2012

Space Telescopes and Instrumentation 2012: Optical, Infrared, and Millimeter Wave

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Abstract:With the delivery of its flight scientific instruments and the completion of all telescope optics both scheduled to occur later this year, the James Webb Space Telescope (JWST) will enter into a challengin g integration and test (I&T) program. Highlights of that program include cryo-vacuum tests of the Integrated Science Instrument Module (ISIM) at Goddard Space Flight Center, ambient integration of the ISIM and the Optical Telescope Element (OTE) at Goddard, and an end-to-end cryo-vacuum test of the OTE + ISIM system at Johnson Space Center. We review the overall flow of the I&T program, highlighting the key activities and the critical verifications to be.performed at each step.

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“…A birds-eye view of the 6.5 meter 18-segmented primary mirror and attached secondary mirror of Webb. This picture is taken just after the telescope and instruments (mated to the back of the mirror) were removed from the NASA Johnson Space Center's Chamber A test facility, after successfully completing a ∼100 day cryovacuum test campaign in 2017 [14,15]. A number of the Webb engineers involved in the test surround the mirror.…”

Section: The James Webb Space Telescopementioning

confidence: 99%

“…Thirteen of these proposals were selected by a peer-review committee and allocated 460 hours, and cover a broad set of science topics including solar system, exoplanet, stellar, galactic, and extragalactic astrophysics. 14 As intended by the program's goals, the DD ERS projects cover observations in all of Webb's major observing modes.…”

Section: A24 Early Release Science Proposalsmentioning

confidence: 99%

Scientific discovery with the James Webb Space Telescope

Kalirai

2018

Contemporary Physics

127

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For the past 400 years, astronomers have sought to observe and interpret the Universe by building more powerful telescopes. These incredible instruments extend the capabilities of one of our most important senses, sight, towards new limits such as increased sensitivity and resolution, new dimensions such as exploration of wavelengths across the full electromagnetic spectrum, new information content such as analysis through spectroscopy, and new cadences such as rapid time-series views of the variable sky. The results from these investments, from small to large telescopes on the ground and in space, have completely transformed our understanding of the Universe; including the discovery that Earth is not the center of the Universe, that the Milky Way is one among many galaxies in the Universe, that relic cosmic background radiation fills all space in the early Universe, that that the expansion rate of the Universe is accelerating, that exoplanets are common around stars, that gravitational waves exist, and much more. For modern astronomical research, the next wave of breakthroughs in fields ranging over planetary, stellar, galactic, and extragalactic science motivate a general-purpose observatory that is optimized at nearand mid-infrared wavelengths, and that has much greater sensitivity, resolution, and spectroscopic multiplexing than all previous telescopes. This scientific vision, from measuring the composition of rocky worlds in the nearby Milky Way galaxy to finding the first sources of light in the Universe to other topics at the forefront of modern astrophysics, motivates the state-of-the-art James Webb Space Telescope (Webb). In this review paper, I summarize the design and technical capabilities of Webb and the scientific opportunities that it enables.

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New approach to cryogenic optical testing the James Webb Space Telescope

Cited by 8 publications

References 0 publications

The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

The James Webb Space Telescope Mission: Optical Telescope Element Design, Development, and Performance

The integration and test program of the James Webb Space Telescope

Scientific discovery with the James Webb Space Telescope

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