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Size: 829
Comment:
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Size: 1551
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 1: | Line 1: |
| = 20180903 = * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=6011]] |
= 20180904 = * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5984]] |
| Line 6: | Line 6: |
| * Checked and adjusted the height * Firstly draw a reference line on a white tape attached to the wall of the 8K shield to easily check where is the center of duct; which was, as written in the klog above, 269mm from the top surface of the breadboard... the nominal number should be 270mm, right?? * Anyway we continued the checking and found the suspended WAB was slightly rolling, so adjusted the roll by the top stages. |
* Installed the WAB suspension into the EYC chamber from the Koach filter side. * As usual, firstly we divided the WAB suspension to the upper and the lower parts, and brought the lower part (the base plate + alpha) to the nominal position on the breadboard in the chamber, and fixed it to the breadboard with the dedicated M6 screws. Then brought the upper part onto the lower part and fix with the dedicated M5 screws. * Before the installation, we need to resolve a few issues. * Issue1: a maraging rod was suspended vertically from the above to the breadboard, and that came in the way of the WAB installation; after some discussion with Takahashi-san, VIS removed the wire. So it is cleared now. * Issue2: several small parts were loosely screwed to the breadboard in the area for the WAB installation; we moved them out of the installation area. * Issue3: a threaded bolt, which seemed to reinforce the cooler bar's fixing, was sticking out its head in the aperture area of the 8K shield duct. This could mechanically interfere against the WAB with protector even it was in the nominal position (not in the saving mode); we removed the threaded rod; Need to inform this to cryo group. |
| Line 13: | Line 16: |
| * Before moving the WAB suspension to the saving mode, attach the magnet dampers. | |
| Line 16: | Line 18: |
| * Vertical standing ruler (or Height Gauge) | * Laser level and the tripod * Vertical standing ruler * White tapes |
20180904
Today's activities
Workers: Akutsu, Simon, Yano, Ken Tanaka
- Installed the WAB suspension into the EYC chamber from the Koach filter side.
- As usual, firstly we divided the WAB suspension to the upper and the lower parts, and brought the lower part (the base plate + alpha) to the nominal position on the breadboard in the chamber, and fixed it to the breadboard with the dedicated M6 screws. Then brought the upper part onto the lower part and fix with the dedicated M5 screws.
- Before the installation, we need to resolve a few issues.
- Issue1: a maraging rod was suspended vertically from the above to the breadboard, and that came in the way of the WAB installation; after some discussion with Takahashi-san, VIS removed the wire. So it is cleared now.
- Issue2: several small parts were loosely screwed to the breadboard in the area for the WAB installation; we moved them out of the installation area.
- Issue3: a threaded bolt, which seemed to reinforce the cooler bar's fixing, was sticking out its head in the aperture area of the 8K shield duct. This could mechanically interfere against the WAB with protector even it was in the nominal position (not in the saving mode); we removed the threaded rod; Need to inform this to cryo group.
Next plan
- Check the height and horizontal position of the WAB.
- Check the pitch and yaw of the WAB.
Wanted!
- Laser level and the tripod
- Vertical standing ruler
- White tapes