Heike R2010-11 R64: Difference between revisions

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* Persistent Current Switch:
* Persistent Current Switch:
** Test PCS of Pt-NMR: Works! (1.5Amp)
** Test PCS of Pt-NMR: Works! (1.5Amp)
** 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!
** Test Heat-Switch of Cu-Stage: Doesn't work! :( 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!

Revision as of 05:54, 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.
  • Persistent Current Switch:
    • Test PCS of Pt-NMR: Works! (1.5Amp)
    • Test Heat-Switch of Cu-Stage: Doesn't work! :( 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!