  Magnetic reconnection in the deep solar atmosphere can give rise to enhanced
emission in the Balmer hydrogen lines, a phenomenon referred to as Ellerman
bombs. To effectively trace magnetic reconnection below the canopy of
chromospheric fibrils, we analyzed unique spectroscopic observations of
Ellerman bombs in the H-alpha line. We analyzed a 10 min dataset of a young
emerging active region observed with the prototype of the Microlensed
Hyperspectral Imager (MiHI) at the Swedish 1-m Solar Telescope (SST). The MiHI
instrument is an integral field spectrograph that is capable of achieving
simultaneous ultra-high resolution in the spatial, temporal and spectral
domains. With the combination of the SST adaptive optics system and image
restoration techniques, MiHI can deliver diffraction limited observations if
the atmospheric seeing conditions allow. The dataset samples the H-alpha line
over 4.5 A with 10 mA/pix, with 0.065"/pix over a field of view of 8.6" x 7.7",
and at a temporal cadence of 1.33s. This constitutes a hyperspectral data cube
that measures 132 x 118 spatial pixels, 456 spectral pixels, and 455 time
steps. There were multiple sites with Ellerman bomb activity associated with
strong magnetic flux emergence. The Ellerman bomb activity is very dynamic,
showing rapid variability and small-scale substructure. We found a number of
plasmoid-like blobs with full-width-half-maximum sizes between 0.1" - 0.4" and
moving with apparent velocities between 14 and 77 km/s. Some of these blobs
have Ellerman bomb spectral profiles with a single peak at a Doppler offset
between 47 and 57 km/s. Our observations support the idea that fast magnetic
reconnection in Ellerman bombs is mediated by the formation of plasmoids. These
MiHI observations demonstrate that a micro-lens based integral field
spectrograph is capable of probing fundamental physical processes in the solar
atmosphere.
