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VAC (OMMT)
takashi.uchiyama - 13:40 Friday 28 August 2026 (37429) Print this report
Opened vcauum chamber OMMT
2026/08/28
Yasui, Kimura, mTakahashi, Sawada

After the venting work, we opened flanges ( 2-6, 2-8) of the OMMT chamber.
Comments to this report:
hiromi.yasui - 15:38 Friday 28 August 2026 (37431) Print this report

[Kimura, Yasui]

We vented OMT-OMMT chamber to atmospheric pressure.

9:17 Turned off the interlock system for GVommt / 3.3*10^-5 Pa

9:24 Closed the GVommt / 9.1*10^-4 Pa

9:32 Started pressurization / opened the ball valve about 15 degrees and the angle valve by two turns)

9:35 3.5*10^2 Pa

9:55 3.1*10^3 Pa

9:59 Increased air flow (opened the ball valve fully and the angle valve by two turns)

10:19 1.0*10^4 Pa

10:35 1.6*10^4 Pa

10:42 Increased air flow ( increased the regulator's secondary pressure from 1.5 to 2.0 kgf/cm^2 and opened the angle valve by two turns)

10:55 2.8*10^4 Pa

11:30 5.7*10^4 Pa

12:00 8.1*10^4 Pa

12:14 9.4*10^4 Pa ->9.6*10^4 Pa

 

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