Heike R2012-02 R66

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NEW

  • Pt-NMR read-out via two s.s. mini-coax. Signal Coil is connected with port #1 and #3.


TEST

  • Testing Pt-NMR. Coax #1 and #3 is connected with a special box. Inside this box the inner conductor of coax #1 is grounded and the inner conductor of #3 is feed through. For details see Pt-NMR Log-Book page 20. At first glance it seems like the device works at Curie-Mode.


TIME TABLE

Icy transfer tube with a sub-prime vacuum :)
  • 28.02.2012: FIRST DAY - CLOSING, CLEANING & PRECOOLING
    • Closing cyrostat and dewar. Cleaning/pumping lines.
    • Precooling with 50l LN.


  • 29.02.2012: SECOND DAY - LIQUID HELIUM
    • 07:50 : Status = TDewar=207K, TMC,Si=216K, TMagn,l=217K, pVC=2.15mbar
    • 09:55 : Start filling LHe
    • 17:00 : Status after two cans (188.8l LHe) =TMC,Si=80K, TMagn,u=50K, pVC=0.45mbar


  • 01.03.2012: THIRD DAY
    • 08:00 : Status = TDewar=78K, TMC,Si=80K, TMagn,u=81K, pVC=0.67mbar, connect 3rd can LHe
    • 11:45 : TMC,Si=4K, start pumping vacuum vessel.
    • 14:00 : Start condensing mix. T1=688mbar, T2=700mbar, T3=0mbar, p4=774mbar.
    • 14:10 : 100% He-Level. Total consumption to reach this level: 428.2 litres (Five cans) .
    • 16:20 : Close Heat-Switch (IPCS#4=1.5A, IH=0.5mA) @ TRuOx=700mK
    • 17:20 : All mix is in, all pumps are running. ISTILL=3.0mA, TRuOx=90mK


  • 02.03.2012: 4th DAY
    • Testing FPD
    • Connecting and Testing Pt-NMR