Heike R2012-02 R66: Difference between revisions
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** 12:40 : I<sub>M</sub>= 40 A, heat switch closed (1,5 A) |
** 12:40 : I<sub>M</sub>= 40 A, heat switch closed (1,5 A) |
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* 07.03.2012: 1<sup>st</sup> DEMAG |
* 07.03.2012: '''1<sup>st</sup> DEMAG''' |
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** 11:04 : Open HS, T<sub>i</sub>= 19.6 mK (corresponding to Noise Thermometer), B<sub>i</sub>= 3.96 T |
** 11:04 : Open HS, T<sub>i</sub>= 19.6 mK (corresponding to Noise Thermometer), B<sub>i</sub>= 3.96 T |
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** 19:06 : I<sub>M</sub>= 0.6 A, T<sub>NMR</sub> ~ 389 uK, NT was disturbed by additional noise contribution in the frequency spectrum. |
** 19:06 : I<sub>M</sub>= 0.6 A, T<sub>NMR</sub> ~ 389 uK, NT was disturbed by additional noise contribution in the frequency spectrum. |
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** 12:00 : I<sub>M</sub>= 40 A, heat switch closed (1,5 A) |
** 12:00 : I<sub>M</sub>= 40 A, heat switch closed (1,5 A) |
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* 17.03.2012: 2<sup>nd</sup> |
* 17.03.2012: '''2<sup>nd</sup> DEMAG''' |
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** ! Changed setup of PLM-4! See NMR-textbook page 23 |
** ! Changed setup of PLM-4! See NMR-textbook page 23 |
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** 11:04 : Open HS, T<sub>i</sub>= 14.95 mK (corresponding to Noise Thermometer), B<sub>i</sub>= 3.96 T |
** 11:04 : Open HS, T<sub>i</sub>= 14.95 mK (corresponding to Noise Thermometer), B<sub>i</sub>= 3.96 T |
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** 19:06 : I<sub>M</sub>= 0.1 A, T<sub>NT</sub> ~ 300uK ( caused by disturbances ! |
** 19:06 : I<sub>M</sub>= 0.1 A, T<sub>NT</sub> ~ 300uK ( caused by disturbances !!! ), '''T<sub>NMR</sub> ~ 85 uK''' (!!!) in Currie Mode. |
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{{clear}} |
{{clear}} |
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Revision as of 10:40, 15 March 2012
NEW
- Pt-NMR read-out via two s.s. mini-coax. Signal Coil is connected with port #1 and #3.
TEST
- Testing Pt-NMR. Coax #1 and #3 is connected with a special box. Inside this box the inner conductor of coax #1 is grounded and the inner conductor of #3 is feed through. For details see Pt-NMR Log-Book page 20. At first glance it seems like the device works at Curie-Mode.
TIME TABLE
- 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 is in, all pumps are running. ISTILL=3.0mA, TRuOx=90mK
- 02.03.2012: 4th DAY
- Testing FPD
- Connecting and Testing Pt-NMR
- 05.03.2012: 1st RAMP MAGNET
- Satus : Heat witch is closed.
- 12:40 : IM= 40 A, heat switch closed (1,5 A)
- 07.03.2012: 1st DEMAG
- 11:04 : Open HS, Ti= 19.6 mK (corresponding to Noise Thermometer), Bi= 3.96 T
- 19:06 : IM= 0.6 A, TNMR ~ 389 uK, NT was disturbed by additional noise contribution in the frequency spectrum.
- 08.03.2012: 2nd RAMP MAGNET
- 12:00 : IM= 40 A, heat switch closed (1,5 A)
- 17.03.2012: 2nd DEMAG
- ! Changed setup of PLM-4! See NMR-textbook page 23
- 11:04 : Open HS, Ti= 14.95 mK (corresponding to Noise Thermometer), Bi= 3.96 T
- 19:06 : IM= 0.1 A, TNT ~ 300uK ( caused by disturbances !!! ), TNMR ~ 85 uK (!!!) in Currie Mode.
