Heike R2010-11 R65: Difference between revisions

From KIP Wiki
ā§¼kip-jumptonavigationā§½ā§¼kip-jumptosearchā§½
Line 29: Line 29:
** 10:45 : Pump dewar (-0.8bar), float with He from recovery line
** 10:45 : Pump dewar (-0.8bar), float with He from recovery line
** 11:00 : 1st can of LHe connected, start 1K-pump (T<sub>Dewar</sub>=121K, T<sub>MC,Si-Diode</sub>=206K, p<sub>VC</sub>=3mbar, T<sub>Magn,u.</sub>=176K)
** 11:00 : 1st can of LHe connected, start 1K-pump (T<sub>Dewar</sub>=121K, T<sub>MC,Si-Diode</sub>=206K, p<sub>VC</sub>=3mbar, T<sub>Magn,u.</sub>=176K)
** 13:30 : 2nd can. By a mistake there was only 16 liters of He taken out of the 1st can!

** 16:00 : 3rd can. 95 liters were taken from 2nd can
** 17:30 : Liquid Helium in Dewar! R<sub>Dewar</sub>=0.92{{O}}!, T<sub>MC,Si-Diode</sub>=58K, p<sub>VC</sub>=0.24mbar (=7.2K), T<sub>Magn,u.</sub>=7K


{{clear}}
{{clear}}

Revision as of 17:25, 1 December 2011

NEW

  • Squid-Wiring for one two-stage Squid
  • Two Lemo plugs and four coax-feedthroughs on top of cryostat.
  • RuOx-000 Thermometer on lower MC platform.
  • New Still-heater!! old one was broken? New resitance RSTILL=1.13k.
  • New Noise-Thermometer mounted on Demag-Stage read out by two Squids.


Tests


Summary

  • 30.11.11: CLOSING AND PRECOOLING
    • 10:30 : Start closing Cryo
    • 14:00 : Dewar closed , start pumping dewar. All lines pumped, all pumps tested.
    • Exchange gas: pVC=10mbar.
    • 15:00 : Start filling nitrogen
    • 17:12 : Dewar Pt-100 shows LN. Continue filling.
    • 17:45 : LN vessel remains connected with the cryostat during the night but without any pressure, atmosphere-valve of LN can is open! (TDewar=78K, TMC,Si-Diode=253K, pVC=3.89mbar, TMagn,u.=233)
  • 01.12.11: START COOLING WITH LHe
    • 08:00 : Status: TDewar=225K, TMC,Si-Diode=221K, pVC=3.4mbar, TMagn,u.=230K. Continue filling with LN until TDewar=78K, continue for 5 minutes.
    • 10:45 : Pump dewar (-0.8bar), float with He from recovery line
    • 11:00 : 1st can of LHe connected, start 1K-pump (TDewar=121K, TMC,Si-Diode=206K, pVC=3mbar, TMagn,u.=176K)
    • 13:30 : 2nd can. By a mistake there was only 16 liters of He taken out of the 1st can!
    • 16:00 : 3rd can. 95 liters were taken from 2nd can
    • 17:30 : Liquid Helium in Dewar! RDewar=0.92!, TMC,Si-Diode=58K, pVC=0.24mbar (=7.2K), TMagn,u.=7K

Checking Filterboxes

  • done!
  • details will be added :)