Status report of ao188 lgs future ao
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Status report of AO188+LGS (+future AO) PowerPoint PPT Presentation


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Yutaka Hayano (Subaru Telescope, NAOJ) S. Oya, M. Hattori, Y. Saito, Y. Minowa, M. Ito, H. Terada, T.S. Pyo, H. Takami, M. Iye (NAOJ), S. Egner (Kayser-Threde GmbH), S Oyabu (Nagoya U.). Status report of AO188+LGS (+future AO). Topics in 2010. Recovery of damaged deformable mirror.

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Status report of AO188+LGS (+future AO)

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Status report of ao188 lgs future ao

Yutaka Hayano (Subaru Telescope, NAOJ)

S. Oya, M. Hattori, Y. Saito, Y. Minowa, M. Ito, H. Terada, T.S. Pyo, H. Takami, M. Iye (NAOJ), S. Egner (Kayser-Threde GmbH), S Oyabu (Nagoya U.)

Status report of AO188+LGS(+future AO)


Topics in 2010

Topics in 2010.

  • Recovery of damaged deformable mirror.

  • LGS mode commissioning.

  • Risk-shared open use at S11A and S11B.


New deformable mirror dm

New deformable mirror (DM)

  • DM was damaged in Jan, 2010.

    • High AC current was applied to the two ground pins.

  • New DM has delivered in August, 2010

  • Implemented electrical circuit breaker.

  • Implemented software limit switch.

  • On-sky performance test in October, 2010.

  • Back to open use operation in November, 2010.

  • Web release on Dec. 27, 2010.


Performance of ngs mode

Performance of NGS mode.


Commissioning of lgs mode

Commissioning of LGS mode.

  • First closed loop on sky in December, 2010.

  • Strehl ratio ~ 0.1 – 0.2 @ K-band

  • FWHM ~ 0.1 arcsec @ K-band

  • Performance v.s. guide star magnitude.

    • 17.8 mag equiv @ 1 kcps / APD (Low-order WFS.)

  • Performance v.s. separatation of TT guide star.

    • Anisoplanatism of TT/focus mode might be larger than 60”.


Risk shared open use

Risk shared open use

  • Risk in performance.

    • SR ~ 0.1 – 0.2, FWHM ~ 0.1” at K-band.

    • Guide star magnitude: brighter than 17.5 in R-band.

    • Separation of guide star: < 80”.

    • Elevation limit = 25 deg.

  • Other features.

    • ADC

      • Science path, high-order WFS, low-order WFS.

    • F-conversion optics. (12 mas mode.)


Future ao for subaru telescope

Future AO for Subaru Telescope.

  • 3rd generation AO for next instrument at IR.

    • Wider field coverage. (~ 10 arcmin.)

    • High throughput. (Adaptive secondary mirror.)

    • Active/Adaptive optics.

    • Multiple guide stars and multiple WFSs.

    • MOAO, GLAO, LTAO etc.


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