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VAC (MCF)
nobuhiro.kimura - 13:54 Monday 19 October 2026 (37689) Print this report
Closed the gate valve between MCF and IFI

[Kimura and Yasui]

 At 1:20 p.m., the gate valve between the MCF and the IFI was closed, and the gate valve interlock was disabled.

The pressure in the MCF prior to closing the gate valve was 2.8 × 10⁻⁵ Pa.

After closing the gate valve, we closed the gate valve between the vacuum duct and the #1 vacuum pump unit, and turned off the #1 ion pump.

Images attached to this report
Comments to this report:
takashi.uchiyama - 16:45 Monday 19 October 2026 (37690) Print this report
We started venting the IMC at 14:50.
We stopped the venting at 16:12. The vacuum pressure reached 0.12 atm.
takashi.uchiyama - 16:50 Monday 19 October 2026 (37693) Print this report
2026/10/19

Uchiyama

A horizontal line to indicate the mounting direction was drawn on the 400-diameter flange with reference to the laser leveler beam. Also, I put a sticker that marked "Up" in the upward direction so that I could see the up and down direction.
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takashi.uchiyama - 12:21 Tuesday 20 October 2026 (37701) Print this report
2026/10/20

Yasui, Kimura, Uchiyama

We resumed the venting at 8:50 and completed it at 12:15.
We spent 4.5 air cylinders.
takashi.uchiyama - 16:05 Tuesday 20 October 2026 (37707) Print this report
2026/10/20

mTakahashi, Sawada, Yasui, Kimura, Uchiyama

We removed the bellows duct and dia. 400 flange from the MCF chamber.
Since there is a high-quality window on the dia. 400 flange, we protected both sides of the window with plastic covers and so on.
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takashi.uchiyama - 12:52 Monday 26 October 2026 (37730) Print this report
2016/10/26

Nakajima(Mirapro), Kimura, Yasui, Sawada, Takahashi, Uchiyama

We attached the 400-diameter flange. The flange’s rotation was adjusted so that the previously marked line aligns with the laser leveler’s line.
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takashi.uchiyama - 15:11 Monday 26 October 2026 (37735) Print this report
2026/10/26

Nakajima (Mirapro), Kimura, Yasui, Sawada, Takahashi, Uchiyama

We temporarily connected the bellows duct to MCE.
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takashi.uchiyama - 11:00 Tuesday 27 October 2026 (37744) Print this report
2026/10/27

Kimura, Yasui, Sawada, Takahashi, Uchiyama

We tightened the dia. 400 flange and the bellows duct (Photo 2) at MCE. The torques we applied them as follows,

Dia. 400 flange: 20 -> 40 -> 40 Nm (Photo 1)
Bellows duct MCE side: 20 -> 40 -> 60 -> 70 Nm (Photo 3)
Bellows duct MCF side: 20 -> 40 -> 60 -> 60 Nm (Photo 4)
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takashi.uchiyama - 11:01 Tuesday 27 October 2026 (37745) Print this report
2026/10/27

We start pumping down IMC at 10:40 on 27 October.
takashi.uchiyama - 14:17 Wednesday 28 October 2026 (37759) Print this report
2026/10/28

Uchiyama

I started TMP at 9 AM on 28 October.
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