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AOS (Optical Levers)
keiko.kokeyama - 18:47 Thursday 07 September 2017 (3347) Print this report
IMMT1&2 Oplevs re-done

[Akutsu, Simon, Kokeyama]

Since there are some mistakes on IMMT1/2 oplevs (listed below), we fixed them and re-installed.

OL transmitter (TX) and receiver (RX)
- The heights of the TXs were lower. Two pedestal spacers (6.35mm, 3.3mm) were added to the regular 50.8mm pedestals.
- The square spacer on the receiver (RX, DCQPD) was wrong: ones for the length sensing oplev was used. We replaced them to the regular spacer.
- The AC cable for the light source of IMMT1 OL was replaced to the proper one
- The driver boxes of the light sources were fixed properly
- The fibers were cleaned by the fiber cleaner tool

IMMT2 OL folding mirror
- The large pedestal was swapped to the default one (185mm, alpica coated) from the one by Somiya-lab (175mm, bare)
- The folding mirror was swapped to the proper one. So far we were using temporary IR mirror.
- They were not aligned. To be done when IMMT2 is fixed.

Comments to this report:
tomotada.akutsu - 0:14 Friday 08 September 2017 (3353) Print this report

> - The folding mirror was swapped to the proper one. So far we were using temporary IR mirror.

The proper folding mirror here is TFVM-25.4C05-VIS-NoMark deliverd yesterday. 3 peices were bought in this fiscal year and here 1 was used.

Be careful: Sigma koki's mirrors are, without clearly demanding of "No marks!", the outer diameters of your optics would be filled by kind memos or kind marks written by pencils! and so cannot be used in vacuum directly; you MUST erase those somehow.

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