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Paper: Fabry Perot Observations Using a New GaAs Photon Counting System
Volume: 282, Galaxies: The Third Dimension
Page: 477
Authors: Hernandez, O.; Gach, J.-L.; Boulesteix, J.; Carignan, C.
Abstract: 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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