Heike R2012-02 R66: Difference between revisions

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** 14:10 : 100% He-Level. Total consumption to reach this level: '''428.2 litres''' (Five cans) .
** 14:10 : 100% He-Level. Total consumption to reach this level: '''428.2 litres''' (Five cans) .
** 16:20 : Close Heat-Switch (I<sub>PCS#4</sub>=1.5A, I<sub>H</sub>=0.5mA) @ T<sub>RuOx</sub>=700mK
** 16:20 : Close Heat-Switch (I<sub>PCS#4</sub>=1.5A, I<sub>H</sub>=0.5mA) @ T<sub>RuOx</sub>=700mK
** 17:20 : All mix in. I<sub>STILL</sub>=3.0mA, T<sub>RuOx</sub>=90mK

Revision as of 11:03, 3 March 2012

NEW

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

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 in. ISTILL=3.0mA, TRuOx=90mK