ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT

Koki Terao; Masayuki Akiyama; Yosuke Minowa; Yoshito Ono; Hajime Ogane; Takumi Akasawa; Shin Oya; Tomoyasu Yamamuro

doi:10.1117/12.2629652

ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT

Koki Terao^*, Masayuki Akiyama, Yosuke Minowa, Yoshito Ono, Hajime Ogane, Takumi Akasawa, Shin Oya, Tomoyasu Yamamuro

^*Corresponding author for this work

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

10 Citations (Scopus)

Abstract

We present the current status of the ULTIMATE-Subaru Tomography Adaptive optics Research experimenT (ULTIMATE-START) project, an upcoming laser tomography adaptive optics (LTAO) system on the Subaru telescope. The main goal of this project is to realize high Strehl ratio AO correction not only in near-infrared bands but also in visible bands above 600 nm. Our LTAO system will be operated with four 32 × 32 Shack Hartmann wavefront sensors (SH-WFSs) and four laser guide stars (LGSs). The LTAO WFSs will be installed behind AO188, which is the current AO system on the Nasmyth platform of the Subaru telescope. We will use the low-order WFS and DM of AO188 for Tip-Tilt measurements with a natural guide star (NGS) and wavefront correction. The DM of AO188 will be upgraded to a 3228 element DM. Assembling of the LTAO WFS system has completed in 2022. Currently WFS data acquisition and tomographic wavefront (WF) estimation testing are underway. We also performed test observations of a prototype single SH-WFS unit with a NGS and LGS with the Subaru telescope. A new laser launching system has been installed. A single LGS is under on-sky performance verification for the open-use observations, and four LGS system, which can make an asterism with 10−40 arcsec diameter, will be installed in 2022. The first light of the entire LTAO system is planned in early 2023.

Original language	English
Title of host publication	Adaptive Optics Systems VIII
Editors	Laura Schreiber, Dirk Schmidt, Elise Vernet
Publisher	SPIE
ISBN (Electronic)	9781510653511
DOIs	https://doi.org/10.1117/12.2629652
Publication status	Published - 2022
Externally published	Yes
Event	Adaptive Optics Systems VIII 2022 - Montreal, Canada Duration: 17 Jul 2022 → 22 Jul 2022

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	12185
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Adaptive Optics Systems VIII 2022
Country/Territory	Canada
City	Montreal
Period	17/07/22 → 22/07/22

Access to Document

10.1117/12.2629652

Cite this

Terao, K., Akiyama, M., Minowa, Y., Ono, Y., Ogane, H., Akasawa, T., Oya, S., & Yamamuro, T. (2022). ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT. In L. Schreiber, D. Schmidt, & E. Vernet (Eds.), Adaptive Optics Systems VIII Article 121856L (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12185). SPIE. https://doi.org/10.1117/12.2629652

@inproceedings{c616ed8c730a42c3b641af4601840bd6,

title = "ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT",

abstract = "We present the current status of the ULTIMATE-Subaru Tomography Adaptive optics Research experimenT (ULTIMATE-START) project, an upcoming laser tomography adaptive optics (LTAO) system on the Subaru telescope. The main goal of this project is to realize high Strehl ratio AO correction not only in near-infrared bands but also in visible bands above 600 nm. Our LTAO system will be operated with four 32 × 32 Shack Hartmann wavefront sensors (SH-WFSs) and four laser guide stars (LGSs). The LTAO WFSs will be installed behind AO188, which is the current AO system on the Nasmyth platform of the Subaru telescope. We will use the low-order WFS and DM of AO188 for Tip-Tilt measurements with a natural guide star (NGS) and wavefront correction. The DM of AO188 will be upgraded to a 3228 element DM. Assembling of the LTAO WFS system has completed in 2022. Currently WFS data acquisition and tomographic wavefront (WF) estimation testing are underway. We also performed test observations of a prototype single SH-WFS unit with a NGS and LGS with the Subaru telescope. A new laser launching system has been installed. A single LGS is under on-sky performance verification for the open-use observations, and four LGS system, which can make an asterism with 10−40 arcsec diameter, will be installed in 2022. The first light of the entire LTAO system is planned in early 2023.",

keywords = "Adaptive optics, laser guide star, tomography",

author = "Koki Terao and Masayuki Akiyama and Yosuke Minowa and Yoshito Ono and Hajime Ogane and Takumi Akasawa and Shin Oya and Tomoyasu Yamamuro",

note = "Publisher Copyright: {\textcopyright} 2022 SPIE.; Adaptive Optics Systems VIII 2022 ; Conference date: 17-07-2022 Through 22-07-2022",

year = "2022",

doi = "10.1117/12.2629652",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Laura Schreiber and Dirk Schmidt and Elise Vernet",

booktitle = "Adaptive Optics Systems VIII",

address = "United States",

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Terao, K, Akiyama, M, Minowa, Y, Ono, Y, Ogane, H, Akasawa, T, Oya, S & Yamamuro, T 2022, ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT. in L Schreiber, D Schmidt & E Vernet (eds), Adaptive Optics Systems VIII., 121856L, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12185, SPIE, Adaptive Optics Systems VIII 2022, Montreal, Canada, 17/07/22. https://doi.org/10.1117/12.2629652

ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT. / Terao, Koki; Akiyama, Masayuki; Minowa, Yosuke et al.
Adaptive Optics Systems VIII. ed. / Laura Schreiber; Dirk Schmidt; Elise Vernet. SPIE, 2022. 121856L (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12185).

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

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AU - Terao, Koki

AU - Akiyama, Masayuki

AU - Minowa, Yosuke

AU - Ono, Yoshito

AU - Ogane, Hajime

AU - Akasawa, Takumi

AU - Oya, Shin

AU - Yamamuro, Tomoyasu

PY - 2022

Y1 - 2022

N2 - We present the current status of the ULTIMATE-Subaru Tomography Adaptive optics Research experimenT (ULTIMATE-START) project, an upcoming laser tomography adaptive optics (LTAO) system on the Subaru telescope. The main goal of this project is to realize high Strehl ratio AO correction not only in near-infrared bands but also in visible bands above 600 nm. Our LTAO system will be operated with four 32 × 32 Shack Hartmann wavefront sensors (SH-WFSs) and four laser guide stars (LGSs). The LTAO WFSs will be installed behind AO188, which is the current AO system on the Nasmyth platform of the Subaru telescope. We will use the low-order WFS and DM of AO188 for Tip-Tilt measurements with a natural guide star (NGS) and wavefront correction. The DM of AO188 will be upgraded to a 3228 element DM. Assembling of the LTAO WFS system has completed in 2022. Currently WFS data acquisition and tomographic wavefront (WF) estimation testing are underway. We also performed test observations of a prototype single SH-WFS unit with a NGS and LGS with the Subaru telescope. A new laser launching system has been installed. A single LGS is under on-sky performance verification for the open-use observations, and four LGS system, which can make an asterism with 10−40 arcsec diameter, will be installed in 2022. The first light of the entire LTAO system is planned in early 2023.

AB - We present the current status of the ULTIMATE-Subaru Tomography Adaptive optics Research experimenT (ULTIMATE-START) project, an upcoming laser tomography adaptive optics (LTAO) system on the Subaru telescope. The main goal of this project is to realize high Strehl ratio AO correction not only in near-infrared bands but also in visible bands above 600 nm. Our LTAO system will be operated with four 32 × 32 Shack Hartmann wavefront sensors (SH-WFSs) and four laser guide stars (LGSs). The LTAO WFSs will be installed behind AO188, which is the current AO system on the Nasmyth platform of the Subaru telescope. We will use the low-order WFS and DM of AO188 for Tip-Tilt measurements with a natural guide star (NGS) and wavefront correction. The DM of AO188 will be upgraded to a 3228 element DM. Assembling of the LTAO WFS system has completed in 2022. Currently WFS data acquisition and tomographic wavefront (WF) estimation testing are underway. We also performed test observations of a prototype single SH-WFS unit with a NGS and LGS with the Subaru telescope. A new laser launching system has been installed. A single LGS is under on-sky performance verification for the open-use observations, and four LGS system, which can make an asterism with 10−40 arcsec diameter, will be installed in 2022. The first light of the entire LTAO system is planned in early 2023.

KW - Adaptive optics

KW - laser guide star

KW - tomography

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U2 - 10.1117/12.2629652

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AN - SCOPUS:85178522344

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Adaptive Optics Systems VIII

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PB - SPIE

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ER -

ULTIMATE-START: Current status of the Subaru Tomography Adaptive optics Research experimenT

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