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R.Tighe

September 2009. Blanco Optics Report. R.Tighe. Az. After shutdown (080709). Before shutdown (061106). PF Baseline Correction (basepf.par): *bo 0 *b2 369 76 *b3 0 0 *b4 0 0. PF Baseline Correction (basepf.par):

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R.Tighe

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  1. CTIO/Optics September 2009 Blanco Optics Report R.Tighe

  2. Az After shutdown (080709) Before shutdown (061106) PF Baseline Correction (basepf.par): *bo 0 *b2 369 76 *b3 0 0 *b4 0 0 PF Baseline Correction (basepf.par): *bo 0 *b2 400 15 *b3 0 0 *b4 0 0 7.5° N 38° PF IQ 130809 • Coma was corrected by translation of PF pedestal: N=0.22mm; W=0.4mm CTIO/Optics

  3. Coma (130809): Comment: This is, to first approximation, the coma LUT for Decam. CTIO/Optics

  4. CTIO/Optics Astigmatism (130809): Comment: After the radial support shutdown, the values of the Astigmatism LUT are smaller than the residual astigmatism after applying the LUT we had before shutdown. It is expected that after applying this 2009 LUT, the residual Astigmatism will be below 0.1Arcsec at all telescope positions.

  5. CTIO/Optics Trefoil and Quadratic (130809): Comment: The Trefoil LUT could be applied because some values are slightly above the target, but not the Quadratic LUT because the values are already smaller than the target.

  6. CTIO/Optics After shutdown (030909) Before shutdown (061106) PF Baseline Correction (basepf.par): *bo 0 *b2 1680 346 *b3 560 341 *b4 170 171 PF Baseline Correction (basepf.par): *bo 0 *b2 940 340 *b3 270 349 *b4 100 180 F/8 IQ 030909 Results at Zenith after applying the F/8 baseline corrections:

  7. CTIO/Optics N E Mirror Seeing ? (or air problems?) Engineering 090709: Telescope Ha:-4:23,Dec:-14:48 i.e. to the E Engineering 130809: Telescope Ha:-4:23,Dec:-14:48 i.e. to the E Comment: In both cases the same baseline correction was applied. Also the distorted spots are mostly opposite to telescope position.

  8. CTIO/Optics Comments: M1 displacement w/r to cell is ~ 1/4 the max. tolerance for coma (~500um); (still is, except when mirror jumps due to air dropping off). To Do short term: Re-measure the aberration skymaps at PF (done) and F/8 (pending). Baseline corrections and LUTs for PF (done) and F/8 (baseline done). Check the counterweights behavior (how close to cell?); (pending but Andres says they should be far away). Implement axial Hard-points Load cells monitoring/logging facility. Implement TCS control to ensure actuator pressure adjusts to telescope slewing fast enough. To Do long term: Re-measure the PFC unit w/r to M1 using the laser projector and Mitutoyos (tbdone as a cross-check, but the real data should be the coma LUT). Finish upgrading the Coating chamber and produce a reliable Al coating recipe before next shutdown (tbdone). Design/Install the new Air Plenum system next shutdown. Comments and To Do List (in red: updating previous report)

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