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Center Independent Research & Development: GSFC IRAD

Rebuild PISCES for Exoplanet Spectroscopy Demonstrations at Goddard

Completed Technology Project
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Project Description

The PISCES instrument configuration aligned on its optical breadboard. The spectrograph element alignment will follow the PISCES defined alignment plan, including a combination of mechanical FaroArm and optical theodolite metrology. The lenslet array clocking requires installation of the lenslet array, using a monochromatic source and adjust the detector position for the minimal spot size, aligning the prism clocking angle such that the spectra from each lenslet are parallel to CCD rows using a Super-K supercontinuum source, and then adjusting the lenslet clocking so that there is no overlap in the spectra.

In 2016, a Goddard research team led by Michael McElwain (Code 667) delivered the Prototype Imaging Spectrograph for Coronagraphic Exoplanet Studies (PISCES) to JPL for incorporation into the WFIRST/Roman Coronagraph project. PISCES has been dormant at JPL since 2018, when the Integral Field Spectrograph (IFS) channel of the Roman Coronagraph was descoped. We seek partial support for the construction of an East Coast iteration of PISCES. This laboratory IFS will serve technology demonstrations in the newly refurbished ExoSpec Lab in GSFC Building 34 and eventually at JPL's High Contrast Imaging Testbed facility.

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