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2019/10/01 (Tuesday)

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Status: Warming up after leak seen from bath to IVC, Softened Vacuum Jacket
1424 MC(Cernox) = 230 +/- 10 K.
1425 Based on the cooling rate, the fridge should reach dew point by 4 am on Thursday. Want to get this to be earlier, going to further soften the vacuum jacket.
1436 Let 19 mbar N2 gas into vacuum manifold. Then open cryostat vacuum jacket valve to let this into the vacuum jacket. Vacuum jacket → 1.2 mbar
1437 Let 19 mbar N2 gas into vacuum manifold. Then open cryostat vacuum jacket valve to let this into the vacuum jacket. Vacuum jacket → 1.9 mbar
1440 Reduce bridge range to 2 kOhm to improve Cernox measurement noise.

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