DL-NIRSP: a Next-Generation Instrument for a Next-Generation Telescope
Sarah Jaeggli
National Solar Observatory



The Diffraction-Limited Near-Infrared Spectropolarimeter is a unique integral field spectrograph currently being built by the Institute for Astronomy for the Daniel K. Inouye Solar Telescope, a new, state of the art flagship facility for ground-based observations of the Sun. DL-NIRSP is a flexible instrument posed to leverage the 4 meter, unobstructed aperture of DKIST for observations of both the Sun's corona and the lower solar atmosphere by combining a high-resolution, multi-wavelength spectrograph with a scanable integral field unit based on fiber-optics and a selection of re-imaging optics. DL-NIRSP will be able to make on-disk observations of the Sun's magnetic field at the smallest spatial scales available with DKIST (0.06 arcsec or 42 km) with the help of the facility's multi-conjugate adaptive optics system, while coronal observations will be made at reduced spatial resolution, using the large collecting area of DKIST to achieve higher signal to noise. In this talk I'll give an overview of the instrument functionality and discuss current progress as we move toward delivery in 2019. In particular the integral field unit and narrow-band filters necessary for DL-NIRSP have presented us with significant technological challenges. I'll also give a preview of ground-breaking first science that can be achieved with DL-NIRSP.