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SHAZAM is a high speed / high sensitivity line-of-sight magnetograph based on the principle of stereoscopic spectroscopy. From 7-14 May 2009 the Stereoscopic High-Speed Zeeman Magnetograph (SHAZAM) will be observing at the Dunn Solar Telescope (U.S. National Solar Observatory / Sac Peak). The purpose of SHAZAM is to push the resolution limits of magnetoconvection studies as small as possible. In light of recent results showing that unresolved small scale processes dominate even the smallest features observable with Hinode’s approximately 0.3” resolution in Na-D (e.g. Lamb et al. 2008, APJ; Title et al. 2009, proc. Hinode-2) and in fact the energy balance of the entire dynamo (Parnell et al. 2009 APJ), it is imperative to make quantitative measurements of the field evolution at the highest possible spatial resolution. Operating at 617.3 nm at the 70-cm DST, SHAZAM may achieve as high as 0.22” resolution, collecting 3-10 single-frame magnetograms per second. (Later runs using a blue line at the SST may achieve full 0.1” resolution). Because SHAZAM uses novel optical principles, it is important to compare results with an instrument that is comparatively well understood and has comparable resolution (Hinode NFI). Hinode/NFI has collaborated with SHAZAM prototype observations before; this is the first SHAZAM observation with a complete instrument (two-polarization, three-camera optical setup). |
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