Fast guiding check w/ oscilloscope

11:30: Tommaso and Sebastian go on the telescope to check the Fast Guiding delay.

We connect an oscilloscope after the 10x divisor installed by Julian Z. The output of the BCU is in the range 0-100V, with the 10x divisor the signal to the NIbox is in the range 0-10V. This image shows the electrical scheme of the 10x divisor and the frequency transfer function.

In the first test we send two step offset with the ARGOS software. The step are 0.005 rad, every 0.1 seconds. We notice that the signals are double steps, the first is 1V and the second is remnant part of the signal.

We connect the output of the PI module to the oscilloscope and we check the delay. The PI signal has a delay of ~1ms, this is consistent with NI box delay measured by Diethard in MPIA. The PI control is ON. The settling time is 4ms.

We decrease the steps, now are 0.001 rad, every 0.1 seconds. The double step disappear. The settling time now seems be 3ms.

We connect the signal form the BCU (with the 10x divisor) directly to the PI module and we check the signals. We notice that the output signal has no delay.

14:30: Tommaso and Sebastian go back on the telescope to make some other measure and install the WfsCameraPump1 on the pnCCD of the WfsCamera1. Pressure inside the pnCCD was 12mbar.

0.002 rad step with 10x divisor

0.004 rad step with 10x divisor

0.008 rad step with 10x divisor

0.004 rad step without 10x divisor

0.008 rad step on RED channel. We disable the control loop and we move the RED mirror with the "argos.hvc.channel" command "moveTo"

0.008 rad step on GREEN channel with the "argos.hvc.channel" command "moveTo"

17:30: The pressure in the pnCCD on the SX side was 0.34mbad. We unmount the pump.

LgswUnitDx calibration and CL test

We setup for calibrations on DX-LGSW.

DX HEXA	-5.45	-8.17	0.87	252	82
DX BOARD	-72.6	-56.8	52.8

Pupil	PMX	PMY
Blue	410	550
Yellow	290	390
Red	425	365

We can launch w/ RO offsets: -0.5; -6.5mm

• DX and SX RO X coordinates are opposite: must be changed in the AARB

We setup for Pyramid BIN4:

TN	AO Gain	AO CL	TT Res. WF [nm rms]	HO Res. WF [nm rms]	AO rec	DIMM ["]	JCL	PCL	Notes
20160515_200314	2.2,0.4,0.3	T	105.371	37.6585	20150704_021500	-1	T	F
20160515_200750	2.2,0.4,0.3	T	124.694	37.1453	20150704_021500	-1	T	F

14:00: we try to acquire new LGSW IM, subaps: 20160312_213700

Pupil	PMX	PMY
Blue	410	550
Yellow	290	390
Red	415	365

Pupil position saved as tag: 20160515_210710

We generate new modal histories:

KL	# modes	MH
21	10	20150515_220100
21	50	20150515_220500
21	150	20150515_221500

We start calibrating 10 modes:

# modes	IM REC	LGSW IM	LGSW REC	COMBO REC
10	zero	20160515_233733	20160515_234300	20160515_234900
50	zero	20160516_002111	20160516_002400	-
50	20160515_234300	20160516_002648	20160516_003300	-
150	20160515_234300	20160516_003609	20160516_003800	20160516_003900

DX HEXA

-5.66

-9.34

0.88

364

58

Then we load combo REC: 20160516_003900

TN	AO Gain	AO CL	TT Res. WF [nm rms]	HO Res. WF [nm rms]	AO rec	DIMM ["]	JCL	PCL	Notes
20160516_004017	0.5,0.5,0.5	T	247.779	68.2895	20160516_003900	-1	F	F
20160516_004047	0.5,0.5,0.5	T	264.184	68.0645	20160516_003900	-1	F	F
20160516_004201	0.5,0.5,0.5	T	353.978	99.9707	20160516_003900	-1	F	F
20160516_004228	0.5,0.5,0.5	T	255.783	97.4896	20160516_003900	-1	F	F
20160516_004254	0.5,0.5,0.5	T	251.248	97.7947	20160516_003900	-1	F	F

After the test we have a new hexapod position:

DX HEXA

-5.46

-7.87

0.88

211

78