AO188/LGSAO188/LGSStatus and ScheduleStatus and Schedule

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Yutaka HayanoYutaka Hayano

January 31, 2008January 31, 2008

ContentsContents

Subaru AO188/LGS overviewSubaru AO188/LGS overview

Performance evaluationPerformance evaluation

Status and ScheduleStatus and Schedule2

Upgrade from Upgrade from AO36 to AO188/LGSAO36 to AO188/LGS

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AO36 LGSAO188

Focus Cassegrain NasmythWFS Curvature WFS 　Band K-band 1 – 5 mmLimiting mag of GS

13~16 (NGS) 13 ~ 16 (NGS mode)17 ~ 19 （ LGS mode ）

LGS No > 4W SFG 10-11 mag

Strehl ratio （ NGS)　　　　　　　　　（ LGS)

0.3@K, 0.05@J

0.7@K, 0.3@J0.56@K

Sky coverage@ K ~1% > 50 %FOV of WFS 2’ 2.7’

System layoutSystem layout

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InstrumentsIRCS(HiCIAO)(Kyoto 3DII)

AO188/NGS First LightAO188/NGS First Light

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IRCS 52mas camera53” x 53”

20mas FOV

October 2006

FWHMFWHM

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K-band V=9.2 guide star

Strehl RatioStrehl Ratio

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K-band V=9.2 guide star

Seeing

Encircled EnergyEncircled Energy

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SeeingJz

HK

L’

M’

System upgrade from System upgrade from the first light configurationthe first light configuration

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OpticsOptics New components. (AOIMR, BS, etc.)New components. (AOIMR, BS, etc.) Upgrade components. (AO Calibration source, Acquisition Unit Upgrade components. (AO Calibration source, Acquisition Unit

etc.)etc.)

ElectronicsElectronics New electronics for new components.New electronics for new components. Minor upgrade.Minor upgrade. Cabling.Cabling.

SoftwareSoftware Re-configurationRe-configuration Minor upgrade.Minor upgrade. New software for new components.New software for new components.

OthersOthers Cover, cooling system, AO/IRCS transfer mechanism.Cover, cooling system, AO/IRCS transfer mechanism.

New/Upgrade items New/Upgrade items on AO optical bench on AO optical bench

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Imagerotator

ADC

HiCIAO I/FF-conversion

Low-order WFS

AU2

AO CalibrationLight source

High-order WFS

DM

Off-axisParabola

Off-axisParabola

AU1

BS1BS2

Flat mirror

Flat mirror

Current statusCurrent status

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Cleared up AO optical bench AO calibration light source unit

Schedule and MilestonesSchedule and Milestones

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2006 2007 2008 2009

First light

Design

Manufacture

Assembly

AO188 assembly/Hilo Test

Summit Transportation

AOCAL HOWFS IMR LOWFS

AOCAL HOWFS IMR LOWFS

AOCAL/HOWFS/IMR LOWFS

Summit Test/Eng Obs

Risk shared open use (NGS)

Laser launch test/LGS test

Risk shared open use (LGS)

Second light (NGS)

April - May

6/5

7/19

S08B

S09A

5/12

Risk-shared open use Risk-shared open use (S08B)(S08B)

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Limited number of nights, proposals. Limited number of nights, proposals. (~ 10 nights, ~ 5 proposals)(~ 10 nights, ~ 5 proposals)

Use sidereal natural guide star.Use sidereal natural guide star. IRCS. (imaging , spectroscopy)IRCS. (imaging , spectroscopy)

Required functionalityRequired functionality Acquisition Unit (AU) can acquires a sidereal guide Acquisition Unit (AU) can acquires a sidereal guide

star.star. AU can shifts the AO point. (dithering)AU can shifts the AO point. (dithering) Wavefront correction in feedback control.Wavefront correction in feedback control. AOIMR can compensate the image rotation.AOIMR can compensate the image rotation. System startup and shutdown.System startup and shutdown. Individual check system for each component.Individual check system for each component.