Sam Barden (National Solar Observatory, USA)

Polarimetric Spectroscopic Imager (PSI) - a new approach to observing the heavens
When Sep 27, 2013 from 10:30 AM to 12:00 PM
  • Colloquium
Where SH, Lecture hall
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Volume Phase Holographic Gratings (VPHGs) have a unique characteristic when the light is diffraction from the incoming beam by a right angle where only one polarization state is diffracted with nearly 100% efficiency while the other polarization state is passed through undiffracted. This allows an innovative instrument design of a high resolution spectro-polarimeter with very high efficiency at quite high spectral dispersion but with a compact and simple implementation. I will present the design concept, expected performance levels for a variety of telescope implementations, and review many of the potential applications that it offers for astronomy.