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September 30th 2014

September 30th 2014

8h30 UT: Andrea arrive to the 30m to cool down the NIKA cryostat and to prepare all the facilities for the polarisation run.

STATUS OF THE INSTRUMENT

9h00 UT: Status of the Camera pulse tube : J1=96.3mbar - J2=329.8mbar - J3=297.3mbar - J4=160mbar - J5=350mbar

09h30 UT: Cryostat connected to the leak detector. Residual pressure in the cryostat 16mbar.

10h00 UT: Pumped the dilution circuit (until Jpi=2.2e-2mbar). Pumped the trap.

11h UT: Pressions stables. The zero on J1 was -41mbar. Reset it again to 0mbar by changing the config file.

11h30 UT: M5 and M6 mounted. Optical alignment of the cryostat with Santiago, OK. LUNCH TIME.

12h30 UT: First Leak test. From 3x10e-9 to 2x10e-8, little scary, I'll do it again before switching on the pulse tube.

13h00 UT: Warm impedance test: between 18 and 20mbar/min at 2.9bar (ev1 closed). Consistent with the last cooling down.

13h15 UT: Circulation throught the capillar starts.

14h00 UT. Pumped ev18 for a few minutes with the turbo pump (down to 2e-4mbar). We had 0.2mbar in ev18. REMEMBER NOT TO TOUCH AGAIN ev18 from now on.

15h45 UT. Second Leak test. From 9.3x10e-9 to 2.5x10e-8. LET'S CONTINUE!

16h30 UT. Pulse Tube on. Low pressure and High pressure OK. Mixture circulates at 2.95bar (J4) and 950mbar (J2 with preref on).

20h05 UT: Lowering to 850mbar. Keep this value for the night.

20h15 UT: T4K=278K. Tstill=265K. Good night and good luck (to myself)

-  ⇤ ← Revision 11 as of 2014-09-30 18:02:59 → 
  Size: 1491
  Editor: NikaBolometer
  Comment:
+   ← Revision 17 as of 2014-09-30 20:15:57 → ⇥
  Size: 1650
  Editor: NikaBolometer
  Comment:
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-'''8h30 UT:''' Andrea come to the 30m to cool down the NIKA cryostat and to prepare all the facilities for the polarisation run.
+'''8h30 UT:''' Andrea arrive to the 30m to cool down the NIKA cryostat and to prepare all the facilities for the polarisation run.
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-'''14h45 UT.''' Second Leak test. From 9.3x10e-9 to 2.5x10e-8. WE CONTINUE!
+'''15h45 UT.''' Second Leak test. From 9.3x10e-9 to 2.5x10e-8. LET'S CONTINUE!
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+Line 36:
-'''15h00 UT.''' Pulse Tube on. Low pressure and High pressure OK. Mixture circulates at 2.95bar (J4) and 950mbar (J2 with preref on).
+'''16h30 UT.''' Pulse Tube on. Low pressure and High pressure OK. Mixture circulates at 2.95bar (J4) and 950mbar (J2 with preref on).

'''20h05 UT:''' Lowering to 850mbar. Keep this value for the night.

'''20h15 UT:''' T4K=278K. Tstill=265K. Good night and good luck (to myself)