The Mid-Infrared Instrument for the James Webb Space Telescope, VI: The Medium Resolution Spectrometer
Journal article, 2015
We describe the design and performance of the Medium Resolution Spectrometer (MRS) for the JWST-MIRI instrument. The MRS incorporates four coaxial spectral channels in a compact opto-mechanical layout that generates spectral images over fields of view up to 7.7 x 7.7 '' in extent and at spectral resolving powers ranging from 1300 to 3700. Each channel includes an all-reflective integral field unit (IFU): an "image slicer" that reformats the input field for presentation to a grating spectrometer. Two 1024 x 1024 focal plane detector arrays record the output spectral images with an instantaneous spectral coverage of approximately one third of the full wavelength range of each channel. The full 5-28.5 mu m spectrum is then obtained by making three exposures using gratings and pass-band-determining filters that are selected using just two three-position mechanisms. The expected on-orbit optical performance is presented, based on testing of the MIRI Flight Model and including spectral and spatial coverage and resolution. The point spread function of the reconstructed images is shown to be diffraction limited and the optical transmission is shown to be consistent with the design expectations.
Thermal-Expansion Measurements
Rmany
Temperature
Optical Materials
Author
M. Wells
Royal Observatory
J. W. Pel
University of Groningen
A. Glasse
Royal Observatory
G. S. Wright
Royal Observatory
G. Aitink-Kroes
R. Azzollini
Dublin Institute for Advanced Studies
Centro de Astrobiologia (CAB)
S. Beard
Royal Observatory
B. R. Brandl
Leiden University
A. Gallie
Royal Observatory
V. C. Geers
Dublin Institute for Advanced Studies
A. M. Glauser
Swiss Federal Institute of Technology in Zürich (ETH)
P. Hastings
Royal Observatory
T. Henning
Max Planck Society
R. Jager
Kay Justtanont
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
B. Kruizinga
Netherlands Organisation for Applied Scientific Research (TNO)
F. Lahuis
Leiden University
Netherlands Institute for Space Research (SRON)
D. Lee
Royal Observatory
I. Martinez-Delgado
Centro de Astrobiologia (CAB)
J. R. Martinez-Galarza
Leiden University
Harvard-Smithsonian Center for Astrophysics
M. Meijers
J. E. Morrison
University of Arizona
F. Muller
Max Planck Society
T. Nakos
Ghent university
B. O'Sullivan
PO3 5PU
A. Oudenhuysen
P. Parr-Burman
Royal Observatory
E. Pauwels
R. R. Rohloff
Max Planck Society
E. Schmalzl
Leiden University
J. Sykes
University Of Leicester
M. P. Thelen
Jet Propulsion Laboratory, California Institute of Technology
E. F. van Dishoeck
Leiden University
B. Vandenbussche
KU Leuven
L. B. Venema
H. Visser
Netherlands Organisation for Applied Scientific Research (TNO)
Lbfm Waters
Netherlands Institute for Space Research (SRON)
University of Amsterdam
D. Wright
Publications of the Astronomical Society of the Pacific
0004-6280 (ISSN) 1538-3873 (eISSN)
Vol. 127 953 646-664Subject Categories
Astronomy, Astrophysics and Cosmology
Infrastructure
Onsala Space Observatory
DOI
10.1086/682281