Infrared Fabry-Perot Spectrometer

Together with G. Cecil at UNC, J. Morse at Colorado, and the staff at CTIO, I am constructing a fully cryogenic Fabry-Perot spectrometer for use at near-infrared wavelengths. The spectrometer will operate at the CTIO 4-m telescope and be available to the general community after a checkout period. We expect the instrument to achieve first light sometime during the summer of 1999.

Instrumental Specifics (4-m)

Spectral range: 1.5 - 2.4 microns; also some J-band sensitivity
Reflectivity: 96%
Cavity Spacing: 250 microns
Material: Water-free Silica
Resolution: 27 km/s at 1.5 microns ; 34 km/s at 2.2 microns
Finesse: ~ 40.

Progress to date:
(*) Optical design completed
(*) Cryogenic etalon constructed by Queensgate
(*) Rutger's controller upgraded to allow for IR operation
(*) Filter wheel design completed
(*) Optical elements purchased
(*) Dewar milled

For more up to date information, see Gerald's Web page.

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Patrick Hartigan