Design tradeoffs for a high spectral resolution mid-infrared echelle spectrograph on the Thirty-Meter Telescope

Tokunaga, A. T.; Bond, Tim; Elias, J. H.; Chun, Mark; Richter, Matthew J.; Liang, Ming; Lacy, J. H.; Daggert, Larry; Tollestrup, E. V.; Ressler, Michael E.; Warren, David W.; Fisher, S.; Carr, John S.

doi:10.1117/12.670169

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…Because a slicing mirror is tilted from the neighboring one by 2.4 • , the light from each mirror is reflected to the different direction [2]. The reflected light goes to a pupil mirror located near the exit pupil of the fore-optics, which then re-images the focal plane image on the pseudo-slit mirrors [3]. Each pupil mirror is individually tilted in order to line up the slit images from the different slicing mirrors onto the pseudo-slit mirror.…”

Section: Polarimetric Capabilitymentioning

confidence: 99%

“…Several papers were published to show the scientific case, feasibility, and technical drivers. [1][2][3] The MIRES science focused on high-resolution spectroscopy as an unmatched capability in sensitivity and spectral-resolution for future mid-IR astronomy. In addition, a design study of a mid-IR adaptive optics (MIRAO) system was undertaken and published 4 since diffraction-limited spatial resolution is essential for MIRES.…”

Section: Introductionmentioning

confidence: 99%

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Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

et al. 2010

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A mid-infrared imager and spectrometer is under consideration for construction in the first decade of the ThirtyMeter Telescope (TMT) operation (see the companion paper by Okamoto). MIRES, a mid-infrared high-spectral resolution optimized instrument, was previously proposed to provide these capabilities to the TMT community. We have revised the design in order to provide an improved optical design for the high-spectral resolution mode with R=120,000, improved imaging with sky chopping, low-spectral resolution mode with an integral field spectrograph, and polarimetry. In this paper we describe the optical design concepts currently under consideration.

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Section: Polarimetric Capabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

et al. 2010

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“…Discussion of the design implications of these requirements is presented elsewhere 5,6 ; the resulting instrument is roughly similar to the high-resolution spectrograph TEXES 1 , but with the additional optics and mechanisms required to interface to an adaptive optics system 4 . Additionally, the science cases rely on accumulating moderate-sized statistical samples -from a few dozen up to a few hundred objects.…”

Section: Instrument Requirementsmentioning

confidence: 99%

“…In the sections that follow, the primary science case for these capabilities is outlined, followed by a discussion of the design requirement derived from the science case. A concept for the instrument and adaptive optics system that would fulfill these requirements is presented elsewhere in these proceedings 4,5,6 .…”

Section: Introductionmentioning

confidence: 99%

Design of the TMT mid-infrared echelle: science drivers and design overview

et al. 2006

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We present a discussion of the science drivers and design approach for a high-resolution, mid-infrared spectrograph for the Thirty-Meter Telescope. The instrument will be integrated with an adaptive optics system optimized for the midinfrared; as a consequence it is not significantly larger or more complex than similar instruments designed for use on smaller telescopes. The high spatial and spectral resolution possible with such a design provides a unique scientific capability. The design provides spectral resolution of up to 120,000 for the 4.5-25 m region in a cross-dispersed format that provides continuous spectral coverage of up to 2% to 14 m. The basic concept is derived from the successful TEXES mid-infrared spectrograph. To facilitate operation, there are separate imaging channels for the near-infrared and the mid-infrared; both can be used for acquisition and the mid-infrared imaging mode can be used for science imaging and for guiding. Because the spectrograph is matched to the diffraction limit of a 30-m telescope, gains in sensitivity are roughly proportional to the square of the telescope diameter, opening up a volume within the Galaxy a thousand times greater than existing instruments.

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“…The original concept for a mid-infrared instrument on TMT was the Mid-InfraRed Echelle Spectrometer (MIRES) 5 . It brought diffraction-limited, high spatial resolution imaging and high-resolution spectroscopy in the thermal infrared (5 µm to 25 µm).…”

Section: Michimentioning

confidence: 99%

The instrumentation program for the Thirty Meter Telescope

et al. 2012

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An overview of the current status of the Thirty Meter Telescope (TMT) instrumentation program is presented. Science cases and operational concepts as well as their links to the instruments are continually revisited and updated through a series of workshops and conferences. Work on the three first-light instruments (WFOS IRIS, and IRMS) has made significant progress, and many groups in TMT partner communities are developing future instrument concepts. Other instrument-related subsystems are also receiving considerable attention given their importance to the scientific end-toend performance of the Observatory. As an example, we describe aspects of the facility instrument cooling system that are crucially important to successful diffraction-limited observations on an extremely large telescope.

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Design tradeoffs for a high spectral resolution mid-infrared echelle spectrograph on the Thirty-Meter Telescope

Cited by 6 publications

References 5 publications

Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

Design of the TMT mid-infrared echelle: science drivers and design overview

The instrumentation program for the Thirty Meter Telescope

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