Physics – Optics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.5172...13p&link_type=abstract
Cryogenic Optical Systems and Instruments X. Edited by Heaney, James B.; Burriesci, Lawrence G. Proceedings of the SPIE, Volume
Physics
Optics
Scientific paper
We present the Fabry-Perot designed for FIBRE and its evolution for its use in the SAFIRE imaging spectrometer for the SOFIA airborne telescope. The Fabry-Perot Interferometer Bolometer Research Experiment (FIBRE) is a broadband submillimeter spectrometer for the Caltech Submillimeter Observatory (CSO). FIBRE's detectors are superconducting transition edge sensor (TES) bolometers read out by SQUID multiplexers. During the first light of FIBRE in June 2001, we measured a spectral resolution of about 1200. The Fabry-Perot concept has its heritage in the ISO/LWS instrument, scaled and adapted to the submillimeter range. The semi-reflecting optics consist of a metallic meshe deposited on a lens and a wedged plate made of monocrystalline quartz. We use three voice coil actuators in the Fabry-Perot design to achieve a displacement of 600 microns of the moving plate. The use of NbTi superconducting wire for the coils allows operation at 1.5 K without any Joule dissipation. Capacitive sensors in line with each actuator and their AC readout provide three independant position measurements. These measurements are fed into a triple PID amplifier controlling the actuators. Because of the high level of vibrations present on an airborne instrument platform, it it necessary to reject the vibrations in the Fabry-Perot up to the resonance frequencies. We propose an original method to obtain a frequency response of the PID system up to 60 Hz. The updated Fabry-Perot will be used for the next FIBRE run in autumn 2003, aiming to detect the Doppler-broadened line emission from external galaxies.
Benford Dominic J.
Fixsen Dale J.
Lefranc Sébastien
Maffei Bruno
Moseley Samuel Harvey
No associations
LandOfFree
Design and performances of a cryogenic Fabry-Perot for submillimeter astronomy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Design and performances of a cryogenic Fabry-Perot for submillimeter astronomy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Design and performances of a cryogenic Fabry-Perot for submillimeter astronomy will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1035748