Fabry Perot Observations Using a New GaAs Photon Counting System

Details Fabry Perot Observations Using a New GaAs Photon Counting System Fabry Perot Observations Using a New GaAs Photon Counting System

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aspc..282..477h&link_type=abstract

Galaxies: The Third Dimension, ASP Conference Proceedings, Vol. 282. Edited by Margarita Rosado, Luc Binette, and Lorena Arias.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We present a third generation photon counting camera (IPCS) based on an GaAs photocathode that can achieve quantum efficiency up to 23%, comparable to a thick CCD, but without readout noise. This system is 10 times more sensitive at Hα wavelength than previous photon counting cameras. In terms of S/N ratio, the system outperforms CCD for extremely faint fluxes, included AR coated low noise thin CCDs. This system offers up to 1k W 1k pixels which is the largest monolithic IPCS. An original cooling system is used with this camera settled by a Ranque-Hilsh vortex tube. The real-time centering is done by a scalable DSP board. Astrophysical projects and preliminary results obtained with this new camera coupled with a scanning Fabry-Perot at the Cassegrain focus of the 3.6m ESO telescope, the 1.93m OHP telescope, and 1.6m mont Migantic (Quhbec) telescope are presented.

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