Daytime

RRH installation

• removed brackets and pins of the mirror cover. Stored in AO cabinet #2
• installed brackets of RRH and installed RRH. No problems.

4D alignment

• set HP and M3 at the position calibrated on Jun 23, 2010
• shell set and flat using the default flattening of the last run: IRTC.400modes_20100623.sav.sav
• The beam returned back to the F/15 focal plane just 2cm far from the interferometer focus
• spot moved with Rx, Ry and z to superimpose the exit forcus with return focus. "By-eye" procedure
• 4D shows fringes. WARNING: remind to check that 4D is working with FULL FRAME, fringes are dense in this stage of alignment and easily 4D provide wrong results with lower sampling because of aliasing
• Used tool RR_at_telescope_v4.xls for computing hexapod commands to align the mirror from Zernike tip-tilt, focus and coma values provided by 4D
• Final alignment provided:
  • Hexpaod:

    x	y	z	Rx	Ry	Rz
    mm	mm	mm	as	as	as
    0.662	3.051	3.370	-577.841	106.419	0.0

  • M3

    tip	tilt	pist	sel.
    as	as	mm	deg
    -612.1	739.8	0.0	8.5987

  • Mirror figure saved in "D:\4D\data\flattening\20100919\20100919_190000_first_alignment".
    • 4D-Zernike components:
      • AstigX: 3.0um (WFE)
      • AstigY: -3.2um
      • Focus: 0.70um
      • ComaX: -0.16um
      • ComaY: 0.04um
      • Higher orders: 280nm rms (wo trefoil: 180nm rms)

Flattening

• the 4D does not be triggered
• tested with spare fiber-to-BNC transceiver and related spare power supply (spare parts tested as functioning two days before in clean room with spare swing-arm electronics). NO trigger out of the transceiver (checked with scope)
• test with a spare fiber from the LIU panel in the lower-right tree-house (the same of the transceiver) to the transceiver, NO trigger out of the transceiver
• moved telescope horizon pointing and tested the trigger directly from the switch BCU: Trigger OK!
• WARNING: the mirror has been left set by mistake running to horizon. Danger for the magnets!
• THE PROBLEM IS THE FIBER: back to zenith, following the routing of the trigger fiber from the swing-arm cabinet we found the trigger fiber DISCONNECTED in the upper-left tree-house
• procured a fiber for routing directly the trigger signal from the upper-left tree-house to the transceiver in the lower-right tree-house.
• Test not done: 17:30 AZ time: time to dismount the RRH

RRH dismounting

• smooth dismounting
• brackets left on the HUB

Night

• Swing arm retracted: no allowed to set the shell
• dome opened: max wind speed 7m/s at 02:12UT