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Demonstration of an HgCdTe Detector-Based Ultra-Stable Mid- Infrared Spectrometer for Transit Spectroscopy and Phase Curve Observations of Habitable Planets Around M-Stars

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Description

Our goal is to demonstrate the performance of a new ultra-stable HgCdTe (HgCdTe) detector-based mid-infrared (MIR) spectrometer in the laboratory. An existing long-wavelength HgCdTe detector array (Cabrera et al. 2020), provided by one of our collaborators, will be integrated into the existing experiment that uses a high precision calibration scheme, which we call MIRASET (the Mid-InfraRed Array Spectrometer for Exoplanet Transits; Staguhn et al. 2019). MIRASET is currently equipped with superconducting Transition Edge Sensor (TES) detector arrays, but recent results in the laboratory and with JWST suggest that improved HgCdTe-based instruments, such as MIRASET, may be able to achieve a stability of better than 5 ppm over many hours of observations -- a tight requirement for the detection of atmospheric signatures of habitability and biology on exoplanets around M-dwarf stars via transit/eclipse/phase curve spectroscopy with a future FIR large observatory such as Origins. Most individual components used for this demonstration have a high TRL level, since most are commercially available (detectors are from Teledyne through a loan from University of Rochester; readout electronics will be provided as loaners from other projects, and the black body source, grating, IR optics, IR lasers are OTS). A comparison of the spectrometer's performance with TES versus HgCdTe detector arrays will inform the technology roadmap for future IR missions aimed at the characterization of planets around M-stars and decrease risk and development costs for future instrumentation.

Details

Technology areaSensors and Instruments > Remote Sensing Instruments and Sensors
ProgramStrategic Astrophysics Technology (SAT)
Lead organizationJohns Hopkins University, Baltimore, MD
Start date2024-10-01
End date2026-09-30

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