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2025/07/14 (Monday)

Previous Day

  • Lab in-personnel: Himangshu
Status Bagging all valves near 1K pot as we found multiple valves leaky
1005 Turbo connections redone. Checked pressure stability with time in the bellow, more than 10 minutes under 10e-3 mbar
1210 Main Bath pumped out with LD, Needle valve closed, No signal
1300 Bagged all three valves: 1K pot Speedivalve, 1K pot relief valve, 1K pot needle valve with ziplocks. Sprayed He around the bags, avoiding lower areas to see false signal. LD on 1K: 5e-7 mbar L/s (bg: 7.5e-8 mbar L/s)
1310 Sprayed inside speedivalve bag: signal: 2e-7 mbar L/s. Still smaller than outside spray, suggesting it is away from the leakest valve
1325 Sprayed inside 1k pot needle valve: signal 8.5e-7 mbar L/s, bigger than outside spray
1400 Sprayed inside relief valve bag: signal 2.85e-4 mbar L/s. Very big

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