Diff for "DailyReports11" - www.iram.es Main Wiki

Differences between revisions 9 and 12 (spanning 3 versions)

Contents

January 20th 2015
January 21th 2015

January 20th 2015

9h00 UT: Santiago stars operations to cool down the NIKA cryostat in contact with Andrea and Martino from Grenoble

STATUS OF THE INSTRUMENT

9h00 UT: Connection with automate restored. It does not work well, we lost connection few times in the morning. We probably need to change but for the moment we choose to continue.

9h00 UT: Status of the Camera pulse tube : J5=352mbar

09h30 UT: Santiago connected the cryostat to the leak detector.

10h00 UT: Pumped the dilution circuit (until Jpi=8x10e-3mbar). Trap pumped and emptied.

10h30 UT: Warm impedance test: about 30mbar/min at 3bar. Consistent with the last cooling down.

11h00 UT: Circulation throught the capillar starts.

12h00 UT: Leak test: OK

13h30 UT: M5 and M6 mounted. Optical alignment of the cryostat with Santiago, OK.

14h00 UT. Pulse Tube on. Low pressure and High pressure OK. Mixture circulates at 2.95bar (J4) and 950mbar (J2 with preref on).

16h20 UT: Lowering to 850mbar. Keep this value for the night.

17h40 UT: T4K=272K. Tstill=280K.

January 21th 2015

Cooling down still going on. Tests on acquisition software in Grenoble still going on.

STATUS OF THE INSTRUMENT

06h00 UT: T4K=43K. Tstill=47K.

06h00 UT: Lowering to 550mbar.

08h20 UT: T4K=23.6K. Tstill=30K. Flux set at 360mbar

10h00 UT: T4K=11K. Tstill=18K. Flux at 280mbar

11h30 UT: T4K=7K. Tstill=8K. Flux at 200mbar. We pump directly from ev17 (ev17, ev19,ev1,ev6 open, ev5 closed). The slope is much better.

12h30 UT: T4K=5.5K. Tstill=4.5K. Ready to condensate, but we lost connection with the automate. Waiting the end of the lunch at IRAM to call somebody.

13h30 UT: T4K=5.4K. Tstill=4.27K, R_BM=1.35kOhm Flux at 170mbar. Condensation Started.

15h50 UT: Turbo on. ev11 closed with 40mbar on J5.

-  ⇤ ← Revision 9 as of 2015-01-21 12:41:25 → 
  Size: 1841
  Editor: NikaBolometer
  Comment:
+   ← Revision 12 as of 2015-01-21 15:43:18 → ⇥
  Size: 2041
  Editor: NikaBolometer
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 50:
-'''11h30 UT:''' T4K=7K. Tstill=8K. Flux at 200mbar. We pump directly from ev17. The slope is much better.
+'''11h30 UT:''' T4K=7K. Tstill=8K. Flux at 200mbar. We pump directly from ev17 (ev17, ev19,ev1,ev6 open, ev5 closed). The slope is much better.
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+'''13h30 UT:''' T4K=5.4K. Tstill=4.27K, R_BM=1.35kOhm Flux at 170mbar. '''Condensation Started'''.

'''15h50 UT:''' Turbo on. ev11 closed with 40mbar on J5.