Swing Arm Interlock verification

PFC to ARGOS swing arm interlocks have been re-established. Test for both sides (DX/SX) have been performed and functionality verified.

DX+SX laser system startup

DX and SX laser system was started up and nominal position have been adjusted to the set points. However, it looks like the nominal positions with closed loop are non perfect and not always stable! To be investigated further.

DX LAS periscope position measurement:

Set point:

	Pup x	Pup y	Field x	Field y
L1	555	126	1106	150
L2	338	430	642	826
L3	176	103	280	90

Periscope nominal positions:

	x	y	flexure loop 343->358	x	y	flexure loop 358->367	x	y	flexure loop 367->388	x	y
1A	173622	13666		169553	9401	no change	1695523	9401	After back to nominal position. New position taken as new nominal.	168792	9817
1B	-134161	-20182		-131314	-15119		-131314	-15119		-130676	-15741
2A	280787	-52588		279396	-56562		279396	-56562		280041	-56482
2B	-217811	82565		-218160	85968		-218160	85968		-218647	85818
3A	164050	124		166601	1085		166601	1085		165722	1068
3B	-150178	-14807		-152651	-16066		-152651	-16066		-152069	-16000

SX LAS periscope position measurement:

Set point:

	Pup x	Pup y	Field x	Field y
L1	536	109	1085	153
L2	322	430	720	893
L3	165	87	270	206

Periscope nominal positions:

	x	y	0->382	x	y	382-399	x	y	400->415	x	y	0->48	x	y
1A	28375	77410		24329	77643	no change	24329	77643	After back to nominal position. New position taken as new nominal.	24249	77265	restarted controller	24249	77265
1B	-25519	-115566		-23599	-117703		-23599	-117703		-23373	-117962		-23373	-117962
2A	-52763	40593		-54724	37133		-54724	37133		-55122	37236		-56372	37764
2B	37085	-69491		37206	-66782		37206	-66782		37552	-66896		38463	-67761
3A	-57120	116624		-54481	113912		-54481	113912		-54363	114111		-54363	114111
3B	39573	-202762		37355	-199762		37355	-199762		37289	-200094		37289	-200094

Laser power check:

	SX	DX	DX
L1	9.6	15.0	14.9
L2	10.5	17.4	17.4
L3	8.4	14.5	14.5

SX value with dead and old power meter.

LgswUnitSx caibration with AdSec

From 8:30 to 10:00 the CalUnit interlock is re-enabled.

HEXAPOD

3.77

-1.09

8.00

332

-184

We start to calibrate 10 modes on SX: we load a zero.fits as recontructor.

Modal history must be updated to work with KL_v18 (fits header has been modified by hand, "MH.M2CMATRIX"). Output saved on 10modes_calibrated2.fits.

PBL with fiber ports: we must use the bent gregorian BACK.

# modes	IM REC	IM	LGSW REC	COMBINED REC
10	-	20151209_185342	20151209_190000	-
10	20151209_190000	20151209_190714	20151209_191000	20151209_192300

We now close with 20151209_192300 to better recenter the 3 LGS ob their FoV.

PUP	X	Y
Blue	325	421
Yellow	376	438
Red	487	432
HEXAPOD	3.77	-1.09	8.00	331	-178
# modes	IM REC	IM	LGSW REC	COMBINED REC
10	20151209_190000	20151209_202934	20151209_203000	-
50	20151209_203000	20151209_203631	20151209_203800	-
50	20151209_203800	20151209_204641	20151209_205000	-

All IM have been shifted by 4, all have been acquired at 970Hz. Probable PBL with modal amplitudes that seem very low. We multiply the modal history by a factor 2.

New modal amplitudes: amp_calibrated.fits.

The TT signal seems mixed with other signals. We try to slow down the acquisition rate to avoid hitting the AdSec setling time. We set 600Hz as loop speed.

# modes	IM REC	IM	LGSW REC	COMBINED REC
50	20151209_205000	20151209_205343	20151209_210500	-
150	-	20151209_211401	20151209_211600	-

Then we crash the shell while acquiring the next IM so we go back to the original modal amplitudes.

# modes	IM REC	IM	LGSW REC	COMBINED REC
150	20151209_211600	20151209_211825	20151209_212000	20151209_213200

Blue Pockels cell seems to have the double hear pattern, we check PCT using CalUnit as source, all of them show double hears:

TNs	Plot
SX: '20151209_212410','20151209_212541'

Jitter initial position: 20151209_215612

We try again to record a 150 modes IM:

# modes	IM REC	IM	LGSW REC	COMBINED REC
150	20151209_212000	20151209_220348	20151209_220500	-

We try also to record a new IM using the x2 multiplied modal amplitudes:

# modes	IM REC	IM	LGSW REC	COMBINED REC
150	20151209_220500	20151209_220806	-	bad! the signals rms does not increase
150	20151209_220500	20151209_221155	-	JOL, x1 modal amplitudes
150	20151209_220500	20151209_221605	-	20151209_221700
150	20151209_221700	20151209_221932	20151209_222000	-

We try to close the loop w/o disturb. Red pupil shows a bad behaviour.

TN	Modalplot
20151209_ 222734	-

-- WolfgangGaessler - 11 Dec 2015