Dome closed because of snow...

IM bewteen piezo TT mirror and TS modes

This IM is needed to properly offset the piezo mirror that produces the TT modulation on the PYR to recenter it when the TT loop is closed on the QC. The k-mirror angle is 138.127deg. The TT modulation is set to 1V, PYR running at BIN4, 1kHz. The XY offset is measured in V while the TS modes are in nm rms.

X offset Y offset TS tip TS tilt
0.0 0.0 17.0 -16.5
0.5 0.0 29.0 -6.2
1.0 0.0 27.0 -6.2
2.0 0.0 - -
We have too much light on the PYR, we switch to BIN2, 3V modulation amplitude:

X offset Y offset TS tip TS tilt
0.0 0.0 5.0 6.0
0.5 0.0 32.0 -1.0
1.0 0.0 28.0 0.0
2.0 0.0 25.0 0.0
So we saturate the TS signals for XY offsets > 0.5V. So we decide to calibrate between +/-0.2V. We will put a gain > 1 on the recentering loop...

X offset Y offset TS tip TS tilt
0.0 0.0 16.0 10.0
0.2 0.0 78.0 -163.0
-0.2 0.0 -38.0 181.0
0.0 0.0 16.0 10.0
0.0 0.2 -184 -38.0
0.0 -0.2 37 193
The LUCI rotator angle is 266deg, K-mirror at 171deg (when LUCI rot is at 300deg the K-mirror is at 154deg): K-mirror angle: -0.5 * rot angle + 304deg.

Gilles installs the fiber splitter in the threehouse. We test the comunication between the FLAO BIN1 and ASM. We first close the loop at 150modes with LGSW only. Then we close a FLAO loop through ARGOS.

TN AO Gain Res. WF [nm rms]Sorted descending AO rec JCL PCL Notes Plot
20150225_090847 -0.3,-0.7,-0.5 148.42 20141202_125700 F T LGSW 20150225_090847-20150225_091435_modalplot.png
20150225_091435 1,0.7,0.4 58.8433 20141127_200600 F T FLAO BIN2 20150225_090847-20150225_091435_modalplot.png
-- MarcoBonaglia - 03 Mar 2015

This topic: ARGOS > WebHome > Commissioning > DiaryRun5 > NightTime20150224
Topic revision: 03 Mar 2015, MarcoBonaglia
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