Heike R2010-11 R65: Difference between revisions
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** 10:45 : Pump dewar (-0.8bar), float with He from recovery line |
** 10:45 : Pump dewar (-0.8bar), float with He from recovery line |
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** 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) |
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** 13:30 : 2nd can. By a mistake there was only 16 liters of He taken out of the 1st can! |
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** 16:00 : 3rd can. 95 liters were taken from 2nd can |
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** 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 |
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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 :)
