|
Size: 1773
Comment:
|
Size: 1773
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 5: | Line 5: |
| Andrea Catalano come to the 30m to turn on the NIKA cryostat and checking the cool down remotely controlled from Grenoble (Alain benoit, Alessandro Monfardini and Martino Calvo). | Andrea Catalano come to the 30m to turn on the NIKA cryostat and checking the cool down remotely controlled from Grenoble (Alain Benoit, Alessandro Monfardini and Martino Calvo). |
January 14th 2014
Andrea Catalano come to the 30m to turn on the NIKA cryostat and checking the cool down remotely controlled from Grenoble (Alain Benoit, Alessandro Monfardini and Martino Calvo).
STATUS
9h30: Reboot of the PC NIKA and change the VNC forwarding on the router.
10h: Pumped the trap (J5=46mbar). Pumped the dilution circuit (until Jpi=3e-2mbar).
11h: Pressions stables. ZERO OF J1 IS -25mbar!!!
12h: Connected the leak detector. Residual pressure in the cryostat 6.6mbar.
12h15m: Optical alignment of the cryostat started.
12h30m: Impedance 18mbar/min at 3bar. It is maybe less w.r.t. the last run cryo (not clear from the old files). WE CONTINUE.
13h: Leak test: OK, in the 1e-9 range.Pumped ev18 for 15 minutes. It was well empty in any case. REMEMBER NOT TO TOUCH ev18 ANYMORE.
13h: Optical alignment OK.
14h: GREEN LIGHT for switching on the Pulse Tube. Mixture circulated for two hours at 3bar.
14h30m: Pulse Tube on with 900mbar.
15h30m: Lowering to 870mbar. Keep the same during the night.
23h10m: T4K=160K. Tstill=125K. Lowering the flux at 630mbar for the night.
January 15th 2014
Cooling down still going on.
STATUS
07h00m: T4K=25K. Tstill=30K. Lowering the flux at 340mbar.
09h15m: Close ev5.
10h30m: Coax connected, mppsync connected, computers on (archeops 8-9-10) in the control room
11h00m: Condensation starts.
16h00m: 100mK !!!.
17h45m: Stop Compressor
18h30m: Stop leak detecotr.
18h30m: Nitrogen refill.
18h30m: HWP modulator connected.