First light adaptive optics flao system acceptance test results and beyond
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First Light Adaptive Optics (FLAO) system Acceptance Test results (and beyond!). The main results of the European acceptance test and first 12 nights of commissioning runs at the LBT telescope of the natural guide star based, single conjugate AO system of LBT. Presented by: S. Esposito. Authors.

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First Light Adaptive Optics (FLAO) system Acceptance Test results (and beyond!)

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First light adaptive optics flao system acceptance test results and beyond

First Light Adaptive Optics (FLAO) system Acceptance Test results (and beyond!)

The main results of the European acceptance test and first 12 nights of commissioning runs at the LBT telescope of the natural guide star based, single conjugate AO system of LBT.

Presented by: S. Esposito


Authors

Authors

OsservatorioAstrofisicodiArcetri (Italy) : S. Esposito, A. Riccardi, G. Agapito , C. Arcidiacono , R. Briguglio, L. Busoni, L. Fini, A. Gherardi , J. C. Guerra, F. Quirós-Pacheco, F. Pieralli , E. Pinna, A. Puglisi, P. Ranfagni, P. Salinari , P. Stefanini , A. Tozzi,, M. Xompero

Large Binocular Telescope Observatory : G. Brusa-Zappellini, R. Demers, J. Brynnel

Acknowledgements:

LBTO telescope crew, TO, J. Hill

Support Astronomer: F. Mannucci

ESO: R. Arsenault


Talk overview

Talk overview

  • Main results of the FLAO acceptance test in Europe: 14th – 18th December 2009

  • Summary of system installation at the telescope: 10th February – 15th March 2010

  • Results from the first two on sky runs:

  • 24th May -3rd June, 2010, [8nights/2days]

  • 18th – 25th June, 2010, [4nights/1day]


Flao system key components

FLAO system key components

J. Hill,7733-8 (June 27th )

F. Quiros, 7736-128 (June 28th )

J. Brynnel, 7733-89 (July 2nd )

A. Riccardi, 7736-82 (July 2nd )

  • LBT672a unit

  • 911mm diameter

  • 1.6mm thick, (Mirrorlab)

  • 672 actuators

  • Settlingtime < 1ms

  • 30nm WFE

  • LBT WFS unit

  • Pyramid sensor

  • 30x30 to 5x5 subap.

  • Tilt mod.  2-6 l/D

  • 1Kfps max [30x30]


Acceptance test test tower optical set up

Acceptance test: TestToweroptical set-up

RETROREFLECTOR

iscomposedby a f/1 parabola and a flatmirror. Reflects back incominglights & reimages the pupil on the AdaptiveSecondary

REFERENCE SOURCE generating a point-like source in the focalplanewith an f/15 beam as the LBT F/. The light source is an incandescence lamp.

IRTC. The LBT InfraRed Test Camera to record images. Ithas J and H filters and 3 samplingof 10; 20 ; 100 mas/pix. A dichroicreflect VIS to WFS and trasnmit NIR to IRTC


Acceptance test im measurements

KL mode

Pyramid Signals (Sx, Sy)

Num.

Shape

Bin#1

Bin#2

Bin#3

Bin#4

4

20

100

Acceptance test: IM measurements

IM acquired using fast push pull technique & closed loop.


Acceptance test sr in h band

Acceptance test: SR in H band

Closedloop test in solartowerwithartificialturbulence: SR values in H band vs. star magnitude.

K band SR values

FLAO labmeas.

FLAO labmeas.

FLAO goal

FLAO goal

FLAO baseline

Measurements conditions were intermediate between baseline and goal assumptions for RON; # of modes, thin shell flat.

FLAO baseline

BIN3

66

modes

K band SR values achieved by scaling the SR measured in H band with Marechal formula

BIN4

36modes

BIN1

495modes

BIN2

153modes


First light adaptive optics flao system acceptance test results and beyond

MR=8.5, SRH=83%

MR=10.5, SRH=58%

MR=12.3, SRH=45%

arcsec

arcsec

arcsec

MR=14.6, SRH=23%

MR=16.4, SRH=5%

Seeing-limited, SRH=0.5%

arcsec

arcsec

Acceptance test: correctedPSFs

bin1

bin2

bin2

bin4

bin3

Emulated turbulence: seeing of 0.8”, V=15 m/s


Acceptance test corrected wavefront modal decomposition

Acceptance test: correctedwavefrontmodaldecomposition

FQ

The modaldecompositionof the wavefrontresidualsfor the 4 differentbinningmodes.


Acceptance test sr vs seeing condition

Acceptance test: SR vs. seeingcondition

Measuredvalueof the SR in H band forseeingvaluesof 0.6, 0.8 and 1.5 arcsec

SR valuesof the seeinglimitedcases

0.010 (0.6”)

0.005 (0.8”)

0.001 (1.5”)


Flao system installation @ lbt

FLAO system installation @ LBT

February 9th --March 17th .


Flao system installation @ lbt1

FLAO system installation @ LBT

February 9th --March 17th .


Flao system installation @ lbt2

FLAO system installation @ LBT

February 9th --March 17th .


Flao system installation @ lbt3

FLAO system installation @ LBT

February 9th --March 17th .


Flao system installation @ lbt4

FLAO system installation @ LBT

February 9th --March 17th .


Flao system installation @ lbt5

FLAO system installation @ LBT

February 9th --March 17th .


Flao system installation @ lbt6

FLAO system installation @ LBT

February 9th --March 17th .


First on sky results may 25 th

First on sky results: May 25th

Some of the first closed loop images acquired the 25th of May

The object:

HD 124085, K0, R=7.5 , I=6.9, H=5.8, Triple Star

The atmosphere:

seeing0.6arcsec V band

Elevation58..64

FLAO parameters:

1 KHz, 30x30 subaps, 400 correctedmodes

Results: SR H 65%..73%

Intensitiesbetween open and closedlooprescaledfordisplayingpurposes.

3.2 arcsec

LBT InfraRedTest Camera images: H band, 10mas/pixel scale


The hd 124624 images and sr

The HD 124624 images and SR

The reference:

HD 124624 [14:13:54.67 +37:37:34.2]

R =7.1, H=4.4, J=5.1, K5III

The atmosphere:

seeing0.9arcsec V band

FLAO parameters:

1KHz, 30x30 subaps,400 correctedmodes

Best SRs achieved!

85% H (1s)

47% J (1s)

0.72”

J Band 46.6% SR in 20 sec

H Band 75% SR in 12sec


High h band sr images

High H band SR images

The reference: HD175658, R =6.5, H=2.5

The atmosphere: seeing 0.9 arcsecV band

FLAO parameters: 1KHz, 30x30 subaps,400 correctedmodes


First on sky results corrected image at 850nm

First on skyresults: correctedimage at 850nm

Star mag => R=9.3 J=7.5 H=6.7

The 850nm SR isconsistentwithMarechalscalingof 65% SR in H band

Sensor: E2V CCD47 Filter 850nm; BW 40nm

Texp=6s, scale=20mas/pix

Drizzlingof 5 images SR~20% FWHM=40mas (DL=20mas)

IRTC H Band, scale=10mas/pix, SR~65%

Horizontal cut


First on sky results a 40mas separation binary

First on skyresults: a 40mas separationbinary

Star companion

Image data

H band

4s exposure time

SR > 60% (no correction for 2nd star flux)

FLAO parameters

30x30 subaps

400 correctedmodes

1Khz frame rate


H band sr vs star mag seeing

H band SR vs star mag & seeing

Twoon skyrunsperformed: May 25th-June 3rd, June18th – June 25th

Averagevalueofclosedlooptimeis 4h/night over 12 nights.

K band SR valuesscaledfromprevious plot

2MASS J19460752+2231122

R+I mag 17.0

SR 6.2% H band

FWHM 0.1 arcsec

DIMM 0.9”

7x7 subaps

36 modes, 200 Hz

16 ph/subap/frame

2MASS J19334425+1947482

R+I mag 17.8

FWHM gain 1.4

DIMM 0.9”

7x7 subaps

5 modes, 100Hz

18 ph/subap/frame

Eachpointcorrespondto a different target and reportsanaveragevalueof the achieved SR.

Seeing values measured by LBT DIMM


Imaging globular cluster ngc6341 m92

Imagingglobular cluster NGC6341-M92

The reference:

R 11.5

The atmosphere:

seeing0.7arcsec V band

Elevation 58..69

FLAO parameters:

0.5KHz, 15x15 subaps, 153 correctedmodes

LBT test camera Limiting Magnitude H = 21, in 10minutes (with AO on)

FLAO H Band 8min

HST WFPC3 H Band 20min

Dati sulla configurazione del sistema adattivo durante la osservazione

~10 arcsec

Composite imageJ+H

Composite imageJ+H


Conclusion

Conclusion

  • FLAO acceptance test in 14-18 December 2009 was successful. The system meets specifications. H band SR of 80% and 5% at 8 and 16.5 magnitude star with 0.8 arcsec and v=15m/s .

  • System was installed at LBT in period February/March 2010.

  • On sky first operation is successful: SRs H(K) of 85(92) with mag 8 and SRs H(K) of 6.2 (22) with mag 17.0 (0.8” seeing).

  • FLAO averageclosed loop time of about 4 hours/night over 12 nights.

  • FLAO system commissioning is scheduled to finish by the end of the year 2010.


First on sky results a 40mas separation binary1

First on skyresults: a 40mas separationbinary

H band images: rawimage (left) and withshift&add (right). The improvement in peakintensityis a factor 1.20. Data reductionshowsvibrationlines at 13Hz and 23 Hz (res. tilt jitter 5-10 mas).

SR > 60%

AR

Composite imageJ+H

FLAO parameters

30x30 subaps

400 correctedmodes

1Khz frame rate

4s exp. time


Acceptance test im lab measurements

Settlingtimewait

Exposure

Acceptance test: IM labmeasurements

Basicstepsof IM acquisition

Acquire IM in open loop.

Generate a REC with 10 modes.

Measure a new IM in closedloopwith 10 modes & low gain (0.05).

Mode #2

Mode #1

Mode #0

Measurement in fast push-pullrequirestipically 5 minutesfor 600 modes.


Titoli di coda

Titoli di coda


The flao solar tower test

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

The FLAO solar tower test

LBT672

911mm

F/1.22

1064.7mm

Test of the complete AO system in Europe:

1. Test of system performance: SR vs. star mag, r0, v_wind

2. Test of system observing modes:

a) Seeing limited mode

b) Field stabilization mode

c) AO mode

F1

F/15.0

Light from WFS ref. source

13713mm

WFS unit

F2

LUCIFER dichroic

window

LBT IRTC


Seeing generation

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Seeing generation

A disturbance simulating the OPD variation of a given phase screen is added to each one of the actuator commands computed by the FLAO reconstructor.

WFS slopes

ACT disturbance

WFS computation unit (BCU)

ACT commands

Turbulence history act=1,672

AO RECONSTRUCTOR

ACT final commands

Optical coupling


W unit and infrared test camera irtc

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

W unit and InfraRed test Camera (IRTC)


The flao control software

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

The FLAO control software

The FLAO system is controlled by a complex architecture control SW made up of various parts showed in the picture below. The control SW has three main levels of commands listed below from top to bottom:

AOS GUI

Master instrument

IIF

AOS control

  • 1) The command issued by the master instruments like IRTC or LUCIFERto TCS (IIF calls to TCS module called IIF).

    2) The commands issued by the AOS to the AO supervisor SW.

    3) The command issued by the AO supervisor and AO arbitrators.These commands includes low level commands to control AO system HW.

LBT TCS


Controlling the flao system

Controlling the FLAO system

Load a particular flat on the secondary mirror. Used mainly in SLM.

Set ref. source nominal co-ordinates, magnitude and color. Use of system look-up table.

Command to acquire the reference star moving the WFS stages.

Command to start closed


System automatic configuration

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

System automatic configuration

R0=0.13 Vband, v_wind = 15 m/s

AO mode conf. table

Columns:

# 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

mag bin freq phot modes base rec filtering pupils slopenulltt gain fw1_acq fw2_acq fw1_obs fw2_obs TVbinTVfreqTVavgTVflux

6.0 maximum magnitude

8.5 1 1000 213 496 KL 20091207_165435 pureIntegrator 20090925-113454 zero 2 0.3 0 0 0 0 4 4.3 20 5000

9.5 1 1000 85 496 KL 20091207_165435 pureIntegrator 20090925-113454 zero 2 0.3 0 0 0 0 4 4.3 20 2000

10.5 2 800 166 153 KL 20091105_175922 pureIntegrator 20090928-221919 zero 3 0.9 0 0 0 0 16 12.6 100 5000

11.5 2 625 84 153 KL 20091105_175922 pureIntegrator 20090928-221919 zero 3 0.9 0 0 0 0 16 12.6 100 1800

12.5 2 625 34 153 KL 20091105_175922 pureIntegrator 20090928-221919 zero 3 0.9 3 0 0 0 16 12.6 100 7000

13.5 2 400 21 153 KL 20091105_175922 pureIntegrator 20090928-221919 zero 3 0.9 3 0 0 0 16 12.6 100 2500

14.5 3 200 35 66 KL_v2 20091208_180600 pureIntegrator 20090928-222825 zero 6 0.8 4 0 0 0 16 12.6 100 1700

15.5 4 200 28 36 KL_v2 20091209_195122 pureIntegrator 20091110-152038 zero 6 0.6 4 0 0 0 16 12.6 100 600

16.5 4 100 22 36 KL_v2 20091209_195122 pureIntegrator 20091110-152038 zero 6 0.6 4 0 0 0 16 12.6 100 250

Field Stabilization mode conf. table

#Columns:

# 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

mag bin freq phot modes base rec filtering pupils slopenulltt gain fw1_acq fw2_acq fw1_obs fw2_obs TVbinTVfreqTVavgTVflux

6.0 maximum magnitude

8.5 4 500 7066 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 0 0 0 0 4 4.3 20 5000

9.5 4 500 2812 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 0 0 0 0 4 4.3 20 2000

10.5 4 500 1120 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 0 0 0 0 16 12.6 100 5000

11.5 4 500 444 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 0 0 0 0 16 12.6 100 1800

12.5 4 500 176 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 3 0 0 0 16 12.6 100 7000

13.5 4 500 70 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 3 0 0 0 16 12.6 100 2500

14.5 4 500 28 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 4 0 0 0 16 12.6 100 1700

15.5 4 400 14 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 4 0 0 0 16 12.6 100 600

16.5 4 100 22 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 4 0 0 0 16 12.6 100 250

17.5 4 100 8 5 KL_v2 20091210_181737 pureIntegrator 20091110-152038 zero 6 0.8 4 0 0 0 16 12.6 100 125


H band measured strehl ratios

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

H band measured Strehl ratios


Corrected psfs in h band 0 8 v wind15m s

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

MR=8.5, SRH=83%

MR=12.3, SRH=45%

MR=14.6, SRH=23%

MR=16.4, SRH=5%

Corrected PSFs in H band (0.8”,v_wind15m/s)

Uncorrected SR = 0.5%


Modal decomposition of correction

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Modal decomposition of correction


Sr vs seeing conditions

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

SR vs. seeing conditions

0.6”

0.8”

1.5”


Interpolated k band srs

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Interpolated K band SRs

To obtain the K band Srs values we scaled the measured H band results to K band by using an interpolation function identified by numerical simulations.

This is done by computing, in simulation, the corresponding K_band SR achieved when a given H_band SR is found.


Sky coverage estimate

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Sky coverage estimate

[F. Roddier]

Assume 30 arcsec of isoplanatic patch radius

full, long and short dash lines refer to the Galactic plane, middle latitude and Galactic pole

[A. Tokovinin]


Commissioning main tasks

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Commissioning main tasks

Commissioning campaign duration:

-total time 93 days

-days 57

- (good) nights 36 eq. to 54 nigths


Ao commissioning activity

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

AO Commissioning activity

Activity start date 10Feb10

System unpacking, re-integration &check 10DD

2. Telescope installation of subsystems 12DD

3. System initial day-time calibration

4. Telescope operation in seeing limited mode with adaptive secondary

5. Daytime test with retro-reflector

6. First light on sky 5NN


Manpower for flao 1 commissioning

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Manpower for FLAO #1 commissioning

The required manpower is found compatible with the available resources of the group. The group relevant personnel is composed by 17 persons. About 5-7 personnel units will be available in Arcetri to progress with FLAO#2 test in solar tower (13/01/10-06/07/10).


Conclusions

FP7-JRA1 progress meeting 2, 14-15 January 2010, Florence (ITALY)

Conclusions

  • FLAO #1 has been in operation for 5 months in Arcetri. Test phase has been concluded with the FLAO acceptance test.

  • FLAO acceptance was OK.

  • 1. measured SRs equal or close to goal values.

    • a) SR 85(80)% in K (H) band bright stars (8.5,9.5 mag)

    • b) SR 16(5) % in K (H) band faint stars (16.5 mag)

  • 2. FLAO control SW able to go from power on to closed loop in 5/6 click successfully (including ref. source acquisition).

    • FLAO #1 is now being shipped to LBT, arrival scheduled for February 10.

    • FLAO #1 telescope first light is scheduled in May 2010.


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