A low-noise HAWAII detector system and new cold optics for the CLASSIC/CLIMB beam combiner instrument of the CHARA array

This paper is focused on a millimeter-wave detector system that works at self-heterodyne mode. The detector antenna and MMW front-end are integrated and a weak heterodyne signal is amplified with a low-noise amplifier. After high-speed sampled with a high-speed A/D, digital signal are processed in a FPGA. Some experiment results are shown finally.

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Silicon array detector system for high-rate, low-noise X-ray spectroscopy

IEEE Transactions on Nuclear Science ◽

10.1109/23.790698 ◽

1999 ◽

Vol 46 (4) ◽

pp. 886-889 ◽

Cited By ~ 4

Author(s):

B.A. Ludewigt ◽

B. Krieger ◽

D. Lindstrom ◽

M.R. Maier ◽

M. Rutgersson ◽

...

Keyword(s):

Low Noise ◽

Detector System ◽

High Rate ◽

Array Detector ◽

X Ray

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FLUOR fibered beam combiner at the CHARA array

10.1117/12.459942 ◽

2003 ◽

Cited By ~ 22

Author(s):

Vincent Coude du Foresto ◽

Pascal J. Borde ◽

Antoine Merand ◽

Cyrille Baudouin ◽

Antonin Remond ◽

...

Keyword(s):

Beam Combiner ◽

Chara Array

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THE CLASSIC/CLIMB BEAM COMBINER AT THE CHARA ARRAY

Journal of Astronomical Instrumentation ◽

10.1142/s2251171713400047 ◽

2013 ◽

Vol 02 (02) ◽

pp. 1340004 ◽

Cited By ~ 26

Author(s):

T. A. TEN BRUMMELAAR ◽

J. STURMANN ◽

S. T. RIDGWAY ◽

L. STURMANN ◽

N. H. TURNER ◽

...

Keyword(s):

Scientific Program ◽

Wide Bandwidth ◽

Phase Measurements ◽

Spectral Channel ◽

Beam Combiner ◽

Chara Array

In the same way that every telescope has multiple instruments and cameras, an interferometric array like the CHARA Array will have numerous beam combiners at the back end. And like the instruments of a single telescope, each of these combiners will be optimized for a particular kind of observation or scientific program. In this paper we describe the CLASSIC and CLIMB beam combiners of the CHARA Array. Both are open air, aperture plane, wide bandwidth single spectral channel instruments optimized for sensitivity. CLASSIC is the original two beam combiner used for the first science at CHARA, and it still has the faintest magnitude limit. CLIMB is a three beam expansion of CLASSIC that can also provide closure phase measurements.

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JOUVENCE OF FLUOR: UPGRADES OF A FIBER BEAM COMBINER AT THE CHARA ARRAY

Journal of Astronomical Instrumentation ◽

10.1142/s2251171713400059 ◽

2013 ◽

Vol 02 (02) ◽

pp. 1340005 ◽

Cited By ~ 12

Author(s):

N. J. SCOTT ◽

R. MILLAN-GABET ◽

E. LHOMÉ ◽

T. A. TEN BRUMMELAAR ◽

V. COUDÉ DU FORESTO ◽

...

Keyword(s):

Fourier Transform ◽

Modes Of Operation ◽

Software Upgrades ◽

Remote Operation ◽

Beam Combiner ◽

Control Command ◽

Spectral Dispersion ◽

Chara Array ◽

Software Standards ◽

Pupil Plane

The FLUOR (Fiber Linked Unit for Optical Recombination) interferometric beam combiner located at the CHARA Array on Mt. Wilson, California has recently undergone a program of major upgrades known as Jouvence of FLUOR (JouFLU). These upgrades seek to improve the precision, use, and observing efficiency of FLUOR as well as introduce new modes of operation. A Fourier Transform Spectrograph (FTS) mode and a spectral dispersion mode have been added to improve calibration and data collection. New mechanized stages and new cameras have been added to FLUOR for alignment and pupil plane imaging. Entirely new control/command software has been written for FLUOR which brings it into compliance with CHARA software standards. This allows for continued software upgrades and full remote operation capability. The new JouFLU instrument is now operating on sky and is expected to achieve accurate interferometric visibility amplitude measurements with 0.1 to 0.3% precision.

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