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2020/06/19 (Friday)

Previous Day

  • Lab in-person: Matt
  • Virtual partner: Zach
0909 Matt Fritts body temperature = 97 F.
1014 Matt arrives at lab.
Add more q-compound to stripline elbow gap below fridge flange.

1127 Seeing a larger leak at KF flange to elbow. ~400-700 pbar*l/s. c/w top of elbow, more like 100 pbarL/s.
1145 Slowly letting nitrogen into IVC, bringing it to 1atm.
1200 IVC up to 1atm.
1210 Open KF flange clamp at stripline elbow. Clean metal surfaces with methanol and o-ring with wipe. Add thin coat of vacuum grease to o-ring.
1212 Start slowly scroll pumping on IVC.
1223 At 0.1 mbar switch from scroll pump to turbo pump.
1228 Turbo on IVC = 190 ubar.
1228 Leak signal on IVC with turbo = 5 pbar*l/s.
1229 Leak signal with turbo valved out = 50 pbar*l/s.
1230 Tried blasting near KF flange and elbow again, no leak seen.
1247 Matt leaves lab.
1750 Matt Fritts body temperature = 97.8 F
1240 Turbo on IVC = 63 nbar.
1310 Turbo on IVC = 30 nbar.
1340 Turbo on IVC = 22 nbar.
1410 Turbo on IVC = 19 nbar.
1440 Turbo on IVC = 16 nbar.
1540 Turbo on IVC = 14 nbar.
1840 Turbo on IVC = 12 nbar.

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