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2018/04/21 (Saturday)

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Warming up after a short appeared at 77K. Also throughput was poor. N2 in cryostat vacuum jacket.
1045 MC(Cernox) = 236.3 K
1600 MC(Cernox) = 254.0 K
1954 MC(Cernox) = 262.4 K
1958 Open valve to cryostat vacuum jacket port. Pump manifold reads 12 mbar.
1959 Plug in scroll pump, open valve slightly.
2001 Pressure continues to drop - continue opening scroll pump valve gradually until fully opened.
2002 Short reads ~0.2 nS
2007 Pump manifold reads 0.3 mbar, open valve to turbo pump, close scroll pump valve and unplug.
2008 Turbo pumping on cryostat vacuum jacket - pressure is 1.6E-2 mbar and dropping.
2125 MC(Cernox) = 266.7 K

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