CHARA Michigan phase-tracker (CHAMP): design and fabrication

D.~H. Berger; J.~D. Monnier; R. Millan-Gabet; T.~A. ten Brummelaar; P. Muirhead; E. Pedretti; N. Thureau

doi:10.1117/12.672168

CHARA Michigan phase-tracker (CHAMP): design and fabrication

D.~H. Berger, J.~D. Monnier, R. Millan-Gabet, T.~A. ten Brummelaar, P. Muirhead, E. Pedretti, N. Thureau

School of Engineering & Physical Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

13 Citations (Scopus)

Abstract

We present the design for a near-infrared (JHK) fringe tracker to be used at the CHARA Array, a long baseline optical interferometer located at Mount Wilson Observatory. The CHARA Michigan Phase-tracker (CHAMP) is being fabricated and tested at the University of Michigan and will be transported to the CHARA Array for general use. CHAMP is separate from the science combiners and can therefore be optimized for fringe tracking. It will modulate around fringe center by 1-2λ at up to 500 Hz and calculate phase offsets in real-time using a modified 'ABCD' method . Six pair-wise Mach-Zehnder combiners will phase the entire Array. We give an overview of the optical layout and discuss our design strategy. Components such as the path-length modulators, low-OH fiber transport system, 1024x1024 HAWAII-1 detector, and control computer are discussed.

Original language	Undefined/Unknown
Title of host publication	Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series
Pages	3
Number of pages	1
Volume	6268
DOIs	https://doi.org/10.1117/12.672168
Publication status	Published - 28 Jun 2006

Publication series

Name	Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series

Access to Document

10.1117/12.672168

Cite this

Berger, D. H., Monnier, J. D., Millan-Gabet, R., ten Brummelaar, T. A., Muirhead, P., Pedretti, E., & Thureau, N. (2006). CHARA Michigan phase-tracker (CHAMP): design and fabrication. In Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (Vol. 6268, pp. 3). (Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series). https://doi.org/10.1117/12.672168

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title = "CHARA Michigan phase-tracker (CHAMP): design and fabrication",

abstract = "We present the design for a near-infrared (JHK) fringe tracker to be used at the CHARA Array, a long baseline optical interferometer located at Mount Wilson Observatory. The CHARA Michigan Phase-tracker (CHAMP) is being fabricated and tested at the University of Michigan and will be transported to the CHARA Array for general use. CHAMP is separate from the science combiners and can therefore be optimized for fringe tracking. It will modulate around fringe center by 1-2λ at up to 500 Hz and calculate phase offsets in real-time using a modified 'ABCD' method . Six pair-wise Mach-Zehnder combiners will phase the entire Array. We give an overview of the optical layout and discuss our design strategy. Components such as the path-length modulators, low-OH fiber transport system, 1024x1024 HAWAII-1 detector, and control computer are discussed.",

author = "D.~H. Berger and J.~D. Monnier and R. Millan-Gabet and {ten Brummelaar}, T.~A. and P. Muirhead and E. Pedretti and N. Thureau",

year = "2006",

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day = "28",

doi = "10.1117/12.672168",

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Berger, DH, Monnier, JD, Millan-Gabet, R, ten Brummelaar, TA, Muirhead, P, Pedretti, E & Thureau, N 2006, CHARA Michigan phase-tracker (CHAMP): design and fabrication. in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series. vol. 6268, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series, pp. 3. https://doi.org/10.1117/12.672168

CHARA Michigan phase-tracker (CHAMP): design and fabrication. / Berger, D.~H.; Monnier, J.~D.; Millan-Gabet, R. et al.

Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series. Vol. 6268 2006. p. 3 (Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Berger, D.~H.

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AU - Muirhead, P.

AU - Pedretti, E.

AU - Thureau, N.

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N2 - We present the design for a near-infrared (JHK) fringe tracker to be used at the CHARA Array, a long baseline optical interferometer located at Mount Wilson Observatory. The CHARA Michigan Phase-tracker (CHAMP) is being fabricated and tested at the University of Michigan and will be transported to the CHARA Array for general use. CHAMP is separate from the science combiners and can therefore be optimized for fringe tracking. It will modulate around fringe center by 1-2λ at up to 500 Hz and calculate phase offsets in real-time using a modified 'ABCD' method . Six pair-wise Mach-Zehnder combiners will phase the entire Array. We give an overview of the optical layout and discuss our design strategy. Components such as the path-length modulators, low-OH fiber transport system, 1024x1024 HAWAII-1 detector, and control computer are discussed.

AB - We present the design for a near-infrared (JHK) fringe tracker to be used at the CHARA Array, a long baseline optical interferometer located at Mount Wilson Observatory. The CHARA Michigan Phase-tracker (CHAMP) is being fabricated and tested at the University of Michigan and will be transported to the CHARA Array for general use. CHAMP is separate from the science combiners and can therefore be optimized for fringe tracking. It will modulate around fringe center by 1-2λ at up to 500 Hz and calculate phase offsets in real-time using a modified 'ABCD' method . Six pair-wise Mach-Zehnder combiners will phase the entire Array. We give an overview of the optical layout and discuss our design strategy. Components such as the path-length modulators, low-OH fiber transport system, 1024x1024 HAWAII-1 detector, and control computer are discussed.

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