View source for Heike R2014-00 R68

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.


{{clear}}

= EXPERIMENTS =

* '''Thermometry:''' Noise Thermometer and Pt-NMR Thermometer
* '''Paddle Experiment:''' Zr<sub>55</sub>Cu<sub>30</sub>Al<sub>10</sub>Ni<sub>5</sub> (M. Hempel)
* '''Echo Experiment:''' BK-7 (M. Wolter)


{{clear}}

=TEST=

*
*
*



{{clear}}

=TIME TABLE= 

* 28.01.2014: FIRST DAY - CLOSING
** Closing cryostat.
** 15:30 : Start pumping VC with VP.
** 17:40 : Stop pumping VC, VP off: p<sub>VC</sub>~0.3mbar. Close valves, stop pump.



* 29.01.2014 : SECOND DAY - CLEANING & LEAK TEST
** 08:30 : p<sub>VC</sub>~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: Q<sub>L</sub><10<sup>-10</sup>mbar*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<sup>-3</sup>mbar

<gallery heights="180" perrow="3">
 Image:W3e.jpg|Bottles of Antikal
 Image:Dirt_00.jpg|Bigger than 5µ!
 Image:Dirt_01.jpg|Cheers!.
</gallery>


* 30.01.2014 : THIRD DAY - TEST PADDLE EXPERIMENT



* 31.01.2014 : 4<sup>th</sup> DAY - MOUNTING MAGNET



XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX


** XX:XX : Exchange gas p<sub>VC</sub>~3mbar.
** XX:XX : Pre-cooling with 50l LN.


** XX:XX : Status = T<sub>Dewar</sub>=??K, T<sub>Magn,l</sub>=???K, p<sub>VC</sub>=??mbar
** XX:XX : Start filling LHe
** XX:XX : During 3rd can (after ~ 230 LHe in total): T<sub>RuOx</sub>=4.6K,  p<sub>VC</sub>=3.3*10<sup>-3</sup>mbar
** XX:XX : Pump VC
** XX:XX : He 100%, LHe in total '''~????l'''
** XX:XX : Stop pumping VC, p<sub>VC</sub>=??*10<sup>-5</sup>mbar


* XX.XX.2014: THIRD DAY - '''MIX IN'''
** XX:XX : Status =  p<sub>VC</sub>=??*10<sup>-5</sup>mbar, T<sub>MC,RuOx</sub>=???, T<sub>MC.Si</sub>=??K 
** XX:XX : Start condensing mix. '''T<sub>1</sub>=683mbar, T<sub>2</sub>=695mbar, T<sub>3</sub>=0mbar, p<sub>4</sub>=973mbar'''.
** XX:XX : Close Heat-Switch (I<sub>PCS#4</sub>=1.5A, I<sub>H</sub>=0.5mA) @ T<sub>RuOx</sub>=600mK
** XX:XX : I<sub>Still</sub>=3.0mA, T<sub>RuOx</sub>=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.

{{clear}}

=TO DO= 

*
*
*

{{clear}}