IBIS: A New Post-Focus Instrument for Solar Imaging Spectroscopy

Details IBIS: A New Post-Focus Instrument for Solar Imaging Spectroscopy IBIS: A New Post-Focus Instrument for Solar Imaging Spectroscopy

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006soph..236..415c&link_type=abstract

Solar Physics, Volume 236, Issue 2, pp.415-439

Physics

77

Scientific paper

A new instrument for solar bi-dimensional spectroscopy, the Interferometric BIdimensional Spectrometer (IBIS), has been successfully installed at the Dunn Solar Telescope of the National Solar Observatory (USA-NM) in June 2003. This instrument is essentially composed of a series of two Fabry-Perot interferometers and a set of narrow-band interference filters, used in a classic mount and in axial-mode. It has been designed to take monochromatic images of the solar surface with high spectral ( R ≥ 200 000), spatial ≃ 0.2″), and temporal resolution (several frames s-1). IBIS has a circular field of view, 80″ in diameter and, with suitable interference filters, it can be used in the wavelength range 580 - 860 nm. The wavelength stability of the instrumental profile is very high, the maximum drift in 10 hours amounting to ≃10 m s-1. In this paper the criteria used in the design and the expected instrumental characteristics are described.

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