Heike R2014-00 R68: Difference between revisions
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** Closing cryostat. |
** Closing cryostat. |
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** 15:30 : Start pumping VC with VP. |
** 15:30 : Start pumping VC with VP. |
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** 17:40 : Stop pumping VC: p<sub>VC</sub>~0.3mbar. Close valves, stop pump. |
** 17:40 : Stop pumping VC, VP off: p<sub>VC</sub>~0.3mbar. Close valves, stop pump. |
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| Line 46: | Line 46: | ||
** 14:50 : Leak Test: Q<sub>L</sub><10<sup>-10</sup>mbar*l/sec (with DP running) |
** 14:50 : Leak Test: Q<sub>L</sub><10<sup>-10</sup>mbar*l/sec (with DP running) |
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** 15:00 : Cleaning/pumping lines. |
** 15:00 : Cleaning/pumping lines. |
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** 16:00 : Start pumping VC with DP |
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** 19:00 : Stop pumping VC, DP off: 2*10<sup>-3</sup>mbar |
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Revision as of 07:40, 31 January 2014
First RUN since more than one year!!!
NEW
- New Switch & Relay Box for a easier and better operation of the persistent current switches of the current lines and both magnets.
- HF coax wiring for the Paddle experiment: Two Semi rigid coax cables(Type: SC-160/50-NbTi-NbTi) connecting the experiment mounted underneath the Cu-Stage with the heat sinks at the mixing chamber (Coax #5 & #6). With the help of an "extender", made of a long silver rod, the experiment is placed in the centre of the lower magnet and can be exposed to a magnetic field up to 9T.
- HF coax wiring for the Echo experiment leading from the heat sink at 4K (Coax #2 & #4) to a heat sink at the mixing chamber. The Echo Experiment is mounted on the top side of the Cu-Stage and connected with superconducting semi rigid coax cables (Type: SC-160/50-NbTi-NbTi) with this heat sink.
EXPERIMENTS
- Thermometry: Noise Thermometer and Pt-NMR Thermometer
- Paddle Experiment: Zr55Cu30Al10Ni5 (M. Hempel)
- Echo Experiment: BK-7 (M. Wolter)
TEST
TIME TABLE
- 28.01.2014: FIRST DAY - CLOSING
- Closing cryostat.
- 15:30 : Start pumping VC with VP.
- 17:40 : Stop pumping VC, VP off: pVC~0.3mbar. Close valves, stop pump.
- 29.01.2014 : SECOND DAY - CLEANING & LEAK TEST
- 08:30 : pVC~3.2mbar.
- 09:45 : Start pumping VC again for leak testing.
- 10:30 : Cleaning cooling water circulation since it's blocked again ... :(
- 14:50 : Leak Test: QL<10-10mbar*l/sec (with DP running)
- 15:00 : Cleaning/pumping lines.
- 16:00 : Start pumping VC with DP
- 19:00 : Stop pumping VC, DP off: 2*10-3mbar
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- XX:XX : Exchange gas pVC~3mbar.
- XX:XX : Pre-cooling with 50l LN.
- XX:XX : Status = TDewar=??K, TMagn,l=???K, pVC=??mbar
- XX:XX : Start filling LHe
- XX:XX : During 3rd can (after ~ 230 LHe in total): TRuOx=4.6K, pVC=3.3*10-3mbar
- XX:XX : Pump VC
- XX:XX : He 100%, LHe in total ~????l
- XX:XX : Stop pumping VC, pVC=??*10-5mbar
- XX.XX.2014: THIRD DAY - MIX IN
- XX:XX : Status = pVC=??*10-5mbar, TMC,RuOx=???, TMC.Si=??K
- XX:XX : Start condensing mix. T1=683mbar, T2=695mbar, T3=0mbar, p4=973mbar.
- XX:XX : Close Heat-Switch (IPCS#4=1.5A, IH=0.5mA) @ TRuOx=600mK
- XX:XX : IStill=3.0mA, TRuOx=580mK
- XX:XX : All mix is in, all pumps are running.
- XX.XX.XX: - RAMP MAGNET
- XX.XX.XX: - DEMAG
- XX.XX.XX: MIX OUT
- XX:XX : Start filling mix into the tanks.
