Heike R2010-11 R64: Difference between revisions
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= RUN NOVEMBER 2010 = |
= RUN NOVEMBER 2010 = |
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First Run with Cu-Stage! |
First Run with Cu-Stage! |
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== Tests == |
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We did a lot of test with our new build in devices and connected heat-switches. |
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* Thermometry: |
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** Test Si-Diode (Model: DT-470-CU): Works great down to approximately 1.1K There is only a small deviation of 0.1K at 4.2K. So we should do some small corrections of the calibration curve. |
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** Test PdFe- Susceptibility Thermometer: Doesn't work! |
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** Test ET- Susceptibility Thermometer: Works! :) |
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** Test Pt-NMR: Works so far. Frozen in a persistent current of 1.5A, but we weren't able to read out the NMR quit well since we didn't know whether the Cu-stage was cold or not. |
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* Test Heat-Switch of Cu-Stage: Doesn't! :( Seems like the superconducting wire has a small ohmic resistance of a few m{{O}}. This leads to small heating of some mW and causes the shunting via the 4K-flange! |
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Revision as of 05:51, 31 January 2011
RUN NOVEMBER 2010
First Run with Cu-Stage!
Tests
We did a lot of test with our new build in devices and connected heat-switches.
- Thermometry:
- Test Si-Diode (Model: DT-470-CU): Works great down to approximately 1.1K There is only a small deviation of 0.1K at 4.2K. So we should do some small corrections of the calibration curve.
- Test PdFe- Susceptibility Thermometer: Doesn't work!
- Test ET- Susceptibility Thermometer: Works! :)
- Test Pt-NMR: Works so far. Frozen in a persistent current of 1.5A, but we weren't able to read out the NMR quit well since we didn't know whether the Cu-stage was cold or not.
- Test Heat-Switch of Cu-Stage: Doesn't! :( Seems like the superconducting wire has a small ohmic resistance of a few m. This leads to small heating of some mW and causes the shunting via the 4K-flange!
