-- JenniferPower - 16 Apr 2021

People: Amali & Jenny

Amali's plan: ~3h closed dome, no source but with dome lights on. The idea here would be to gather a set of clear reference images of the WFS pupils vs motion of all the relevant moving bits, so that we can rule possible culprits in/out. When the floods are on, you can easily see the M2 on the OCAM pupils without having to align any beams, so we can quickly figure out which things are definitely not the problem (because they vignette the opposite axis, etc). Basic procedure:
  1. set M3 and baysides to on-sky position (the vignetted one)
  2. take optical loop data / screenshots of OCAM pupils
  3. for each of the following, get images of OCAM pupils at nominal position and with some small but visible motion to either side:
    1. i) filter wheel 1 (in a few different filters)
    2. ii) bayside x
    3. iii) bayside y
    4. iv) adc 1
    5. v) adc 2
    6. vi) UBC dichroic wheel
    7. vii) M3 tip
    8. viii) M3 tilt
    9. ix-xiii) M2 x, y, rx, and ry
(local times)

1:24 Starting position TIP TILT 600, 90 on tertiary: TN#20210416_202234

1:27 FW1 relative offset 0.2 offset Window TN#202622

1:28 FW1 relative offset -0.2 offset, TN#202757

1:30 FW1 relative offset 0 offset in the 400-700 filter TN#203013
  • Offset 0.2 in the 400-700 filter TN#203050
  • Offset -0.2 in the 400-700 filter TN#203121
1.33 Moving baysides 60.994 21.493 73.800 TN#203313
  • Moving bayside X to 57.999 TN#203537
  • homing X and fully vignettes, then move to X 10.001 where half TN#203638
  • X13.000 to when is just slightly vignettes TN#203718
  • X= 80 no change, no vignette TN#203829
1:39 Now moving Y bayside stage
  • Moving to 17.990 TN#203932
  • Homing Y (0.086), no obvious vignette TN#204026
  • Moving Y to higher values, Y=60.000 TN#204108
1:41 Playing with bayside Z
  • moving to 60.0, TN#204215
  • homing to see if anything exciting happens, nope, Z=0.16, TN#204252

1:43 Moving ADC's
  • Starting point: ADC1 67.39, ADC2 -32.72
  • Reference TN#204430
  • Moving ADC1 to 62.48 TN#204606
  • Moving ADC to 72.30 TN#204956
  • Moving ADC1 to 0.087 TN#205031
  • ADC1 back at nominal, now moving ADC2
  • Moving ADC2 to -37.6 TN#205151
  • Moving ADC2 to -27.7 TN#205228
  • Moving ADC2 to -0.094 TN#205318
  • ADC Highlevel: Dispersion angle: 17.36 Axis orientation 49.99 TN#205437
  • Nevermind, doesn't change anything
1:59 SX Turn table: 2727746 TN#205801
  • Moving <50000 to 2680642, TN#210043
  • Moving <100000 2583517 TN#210335
  • We are seeing the image shifting down
  • Moving <100000 2485781 TN#210629
  • Moving up to 2775407 (starting position +50000) TN#211052
  • Moving position up 100000, 2872271 TN#211245, secondary image is clearly moving up.
  • We found that 2708432 looked a bit better centered by eye. TN#211635
2:20 M3 Tip Tilt adjustments: Nominal Absolute Tip Absolute 600 Tilt 90. TN#212018
  • Moving in tip to 500, tilt 90 TN#212158
  • Moving in tip to 400, tilt 90 TN#212406
  • Moving in tip to 300, tilt 90 TN#212508
  • Moving in tip to 200, tilt 90 TN#212623
  • Moving in tip to 100, tilt 90 TN#212656
  • Moving in tip to 0, tilt 90 TN#212727
  • Moving in tip to -100, tilt 90 TN#212822
  • Moving in tip to -200, tilt 90 TN#212850, secondary image fully visible
Going back to nominal for Absolute:
  • Moving in Tilt for posterity -200 TN#213117
  • Moving in tilt -300 TN#213304
Trying to move the Turntable in concert with Tilt:
  • M3 600, -300 2610463 TN#213423
2:40 M2 Tests now:
  • Updated global offsets to zero and hexapod offsets to zero. TN#214051
  • Moving Xmm global offset to 1mm TN#214158 all else zero
  • Moving Xmm global offset to 4mm TN#214248 all else zero
  • Moving Xmm global offset to -1mm TN#214341 all else zero
  • Moving Xmm global offset to -4mm TN#214443 all else zero

  • Moving Ymm global offset to 1mm TN#214553 all else zero
  • Moving Ymm global offset to 4mm TN#214637 all else zero
  • Moving Ymm global offset to -1mm TN#214736 all else zero
  • Moving Ymm global offset to -4mm TN#214833 all else zero

  • Moving Zmm global offset to 5mm TN#214955 all else zero
  • Moving Zmm global offset to -5mm TN#215112 all else zero

  • Moving RX("") global offset to 100 TN#215236 all else zero
  • Moving RX("") global offset to 500 TN#215321 all else zero
  • Moving RX("") global offset to -100 TN#215347 all else zero
  • Moving RX("") global offset to -500 TN#215411 all else zero

  • Moving RY("") global offset to 100 TN#215446 all else zero
  • Moving RY("") global offset to 500 TN#215518 all else zero
  • Moving RY("") global offset to -100 TN#215554 all else zero
  • Moving RY("") global offset to -500 TN#215634 all else zero
2:59 Moving the tertiary to the position where we saw the full secondary and repeating the RX, RY tests
  • Tertiarty absolute -200, 90. Secondary all zero. TN215928
  • Moving RX("") global offset to 500 TN#220054 all else zero
  • Moving RX("") global offset to -500 TN#220131 all else zero
  • Moving RY("") global offset to 500 TN#220214 all else zero
  • Moving RY("") global offset to -500 TN#220300 all else zero
The only thing we could do to see the entire secondary was move the tertiary.
Topic revision: r1 - 16 Apr 2021, JenniferPower
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