Heike R2010-11 R65: Difference between revisions
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= Summary = |
= Summary = |
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* 30.11.11: 1st DAY - CLOSING AND PRECOOLING |
* 30.11.11: 1st DAY - CLOSING AND PRECOOLING |
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** 10:30 : Start closing Cryo |
** 10:30 : Start closing Cryo |
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** 17:12 : Dewar Pt-100 shows LN. Continue filling. |
** 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) |
** 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: 2nd DAY - START COOLING WITH LHe |
* 01.12.11: 2nd DAY - START COOLING WITH LHe |
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** 18:30 : 4K! T<sub>MC,Si-Diode</sub>=4.1K, p<sub>VC</sub>=4.3E-03mbar, R<sub>MC,CT</sub>=275{{O}}. |
** 18:30 : 4K! T<sub>MC,Si-Diode</sub>=4.1K, p<sub>VC</sub>=4.3E-03mbar, R<sub>MC,CT</sub>=275{{O}}. |
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** 19:15 : Disconnect 4th can, 91 litres were taken. R<sub>MC,CT</sub>=275{{O}}, p<sub>VC</sub>=4.1E-03mbar, |
** 19:15 : Disconnect 4th can, 91 litres were taken. R<sub>MC,CT</sub>=275{{O}}, p<sub>VC</sub>=4.1E-03mbar, |
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-> He consumption: 272 litres. |
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* 02.12.11: 3rd DAY - 4K |
* 02.12.11: 3rd DAY - 4K |
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** 08:15 : T<sub>MC,Si-Diode</sub>=4.1K, R<sub>MC,CT</sub>=276{{O}}, p<sub>VC</sub>=4.8E-03mbar, |
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** 08:30 : Pump exchange gas |
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Revision as of 08:17, 2 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: 1st DAY - 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: 2nd DAY - 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 litres of He taken out of the 1st can!
- 16:00 : 3rd can. 95 litres 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
- 18:00 : 4th can. 70 litres were taken from 3rd can.
- 18:30 : 4K! TMC,Si-Diode=4.1K, pVC=4.3E-03mbar, RMC,CT=275.
- 19:15 : Disconnect 4th can, 91 litres were taken. RMC,CT=275, pVC=4.1E-03mbar,
-> He consumption: 272 litres.
- 02.12.11: 3rd DAY - 4K
- 08:15 : TMC,Si-Diode=4.1K, RMC,CT=276, pVC=4.8E-03mbar,
- 08:30 : Pump exchange gas
Checking Filterboxes
- done!
- details will be added :)
