Autogain test (QC + LGSW)

We tested the autogain procedure in different environments: no disturb, disturb =1.2", PYR + LGSW and QC + LGSW. We first optimized the TT gain. Then we optimized the LO gain having closed the TT loop with the best gain found. We repeated the same procedure to optimize the HO gain (TT + LO closed loop).

Quad cell autogain:

gain_opt_tiptilt_500Hz.png

LGSW autogain (modes 2-36 left, modes 37-150 right):

gain_opt_lo.png gain_opt_ho.png

QC hot spot on CCD47

We checked the position on the PSF on the CCD47 when the TT loop is closed on the QC:

BIN2: [254; 270]px, modulation offset = [-2.0, 0.1]V, rotator angle = 361°, K-mirror angle = 89.5°

The hot spot definition is independent from the FW1 filter because the 2 elements (QC and CCD47) are common path with FW1.

JitterCompensation test

We load a sinusoidal disturbance on the ASM. Amplitude of the oscillation is 200nm PtV. We acquire TN while the mirror is oscillating at different frequencies (from 1 to 200Hz). For each frequency we acquire a TN with jitter compensation loop closed and open. FF gain is set to 0.0, 0.5 and 1.0.

TN AO Dist g FFg Plot
20150228_060516 sn_120.0 0 1 jitterLoopTransferFunction200.png
20150228_060536 sn_120.0 0.2 1
20150228_060551 sn_120.0 0.4 1
20150228_060603 sn_120.0 0.5 1
20150228_060654 sn_150.0 0 1
20150228_060710 sn_150.0 0.2 1
20150228_060728 sn_150.0 0.4 1
20150228_060746 sn_150.0 0.5 1
20150228_060825 sn_200.0 0 1
20150228_060846 sn_200.0 0.2 1
20150228_060902 sn_200.0 0.4 1
20150228_060931 sn_200.0 0.5 1

TN AO Dist g FFg Plot
20150228_062734 sn_0.0 0 0.5 jitterLoopTransferFunction_ff05_g06.png
20150228_062748 sn_0.0 0.6 0.5
20150228_062826 sn_1.0 0 0.5
20150228_062850 sn_1.0 0.6 0.5
20150228_062929 sn_10.0 0 0.5
20150228_062945 sn_10.0 0.6 0.5
20150228_063029 sn_20.0 0 0.5
20150228_063044 sn_20.0 0.6 0.5
20150228_063123 sn_30.0 0 0.5
20150228_063138 sn_30.0 0.6 0.5
20150228_063222 sn_40.0 0 0.5
20150228_063235 sn_40.0 0.6 0.5
20150228_063324 sn_50.0 0 0.5
20150228_063345 sn_50.0 0.6 0.5
20150228_063424 sn_60.0 0 0.5
20150228_063451 sn_60.0 0.6 0.5
20150228_063542 sn_70.0 0 0.5
20150228_063601 sn_70.0 0.6 0.5
20150228_063643 sn_80.0 0 0.5
20150228_063701 sn_80.0 0.6 0.5
20150228_063748 sn_90.0 0 0.5
20150228_063802 sn_90.0 0.6 0.5

TN AO Dist g FFg Plot
20150228_071059 sn_0.0 0 0 jitterLoopTransferFunction_ff0_g04.png
20150228_071127 sn_0.0 0.4 0
20150228_071218 sn_1.0 0 0
20150228_071244 sn_1.0 0.4 0
20150228_071331 sn_10.0 0 0
20150228_071350 sn_10.0 0.4 0
20150228_071427 sn_20.0 0 0
20150228_071443 sn_20.0 0.4 0
20150228_071522 sn_30.0 0 0
20150228_071543 sn_30.0 0.4 0
20150228_071638 sn_40.0 0 0
20150228_071656 sn_40.0 0.4 0
20150228_071738 sn_50.0 0 0
20150228_071757 sn_50.0 0.4 0
20150228_071835 sn_60.0 0 0
20150228_071853 sn_60.0 0.4 0
20150228_071933 sn_70.0 0 0
20150228_071954 sn_70.0 0.4 0
20150228_072033 sn_80.0 0 0
20150228_072052 sn_80.0 0.4 0
20150228_072131 sn_90.0 0 0
20150228_072146 sn_90.0 0.4 0
20150228_072221 sn_120.0 0 0
20150228_072245 sn_120.0 0.4 0
20150228_072328 sn_150.0 0 0
20150228_072356 sn_150.0 0.4 0
20150228_072436 sn_200.0 0 0
20150228_072458 sn_200.0 0.4 0

Loops gains f_c [Hz] f_o [Hz] JCLTF(f_o)
FFg= 0.0, g= 0.4 31 50 4.8
FFg= 0.5, g= 0.6 43 70 3.9
FFg= 1.0, g= 0.5 48 80 2.2

FLAO fiber splitter test

We try to close the loop with FLAO BIN1 through the fiber splitter:

TN Notes
20150228_131648 G=1.0,0.5,0.5, M=14, 350 counts on QC
20150228_131732
20150228_131801
20150228_132216 1.5,0.5,0.5, PYR loop, 1kHz, 140 counts
20150228_132242
20150228_132312
-- TommasoMazzoni - 04 Mar 2015
Topic revision: r3 - 09 Mar 2015, MarcoBonaglia
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