|
Size: 1629
Comment:
|
Size: 1952
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 11: | Line 11: |
| We measured the noise with the window on the cryostat and a base temperature of 265mK to check if the pulse tube is visible. It does not seem to generate a noise that can bother us during the observations. | We measured the noise with the window on the cryostat and a base temperature of 265mK to check if the pulse tube is visible. It does not seem to generate a noise that can bother us during the observations. However, the 1/f noise is large. We hope that after switching on the turbo molecular pump this contribution will be decreased. *** Array 1 {{attachment:Run11_1mm1_Window.png||height=415}} *** Array 3 {{attachment:Run11_1mm3_Window.png||height=415}} *** Array 2 {{attachment:Run11_2mm_Window.png||height=415}} |
Back to the NIKA2 Run 11 main page
Daily Reports
June 8, (Thursday)
We measured the noise with the window on the cryostat and a base temperature of 265mK to check if the pulse tube is visible. It does not seem to generate a noise that can bother us during the observations. However, the 1/f noise is large. We hope that after switching on the turbo molecular pump this contribution will be decreased.
*** Array 1 
*** Array 3 
*** Array 2 
June 7, (Wednesday)
* We performed the optical alignment check with Santiago. The alignment is good so we did not change the position of the mirrors. We also checked the alignment of the HWP.
* The electronics of the HWP wheel is working nominally. We tested different speeds without problems.
* Juan Penalver tested the temperature control of the cabin and setting the temperature at 12°C for few hours. Tomorrow before starting the observation we will switch on the turbo pump after setting the temperature of the cabin to 10 or 12°C.
June 6, (Tuesday)
* Aina, Alessia, Nicolas and Andrea arrived at the telescope. The idea is to prepare carefully the observations starting on Thursday since the last observation in polarisation performed with NIKA2 was more than a year ago. Nicolas Aina and Alessia worked on the polarisation pipeline, Andrea set up the polarisation facilities and check their proper operation.
* The temperature of the mixing chamber is about 265 mK without using the turbo molecular pump. The pressure on P101 is slowly increasing showing that the trap is saturating. It does not seems to be a big problem because the slope is about 40mbar/day meaning that probably we can observe until next tuesday without switching the trap.