Heike R2010-11 R65: Difference between revisions
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** Exchange gas: p<sub>VC</sub>=10mbar. |
** Exchange gas: p<sub>VC</sub>=10mbar. |
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** 15:00 : Start filling nitrogen |
** 15:00 : Start filling nitrogen |
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** 17:12 : Dewar Pt-100 shows LN. |
** 17:12 : Dewar Pt-100 shows LN. Continue filling. |
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** 17:45 : LN vessel remains connected with the cryostat during the night but without any pressure, atmosphere-valve of LN can is open! (T<sub>Dewar</sub>=78K, T<sub>MC,Si-Diode</sub>=253K, p<sub>VC</sub>=3.89mbar, T<sub>Magn,u.</sub>=233) |
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* 01.12.11: START COOLING WITH LHe |
* 01.12.11: START COOLING WITH LHe |
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** 08:00 : Continue filling with LN until T<sub>Dewar</sub>=78K, continue for 5 minutes. |
** 08:00 : Continue filling with LN until T<sub>Dewar</sub>=78K, continue for 5 minutes. |
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Revision as of 14:27, 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: COOLING DOWN
- 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 : 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)
Checking Filterboxes
- done!
- details will be added :)
