Initial Observations with the Upgraded Coronal Multi-channel Polarimeter (UCoMP)

The Upgraded Coronal Multi-channel Polarimeter (UCoMP) is a coronal polarimeter with a narrow-band tunable Lyot filter capable of imaging the intensity, full Stokes polarization, and Doppler shift across a wide range of coronal emission lines in the visible and near-IR regions of the coronal spectrum. The UCoMP is an upgrade of the CoMP instrument with a broader wavelength range, a larger field-of-view and higher spatial resolution. The UCoMP demonstrates the technology of a large aperture (50 mm) tunable birefringent filter based on Lithium Niobate crystals that is pathfinder instrument for the COSMO project. The instrument was deployed to the Mauna Loa Solar Observatory and started taking data May 26, 2021, followed by a period of instrument commissioning. This presentation will describe the UCoMP instrument, illustrate its operation with samples of the data, and highlight initial results from the instrument.