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Preparation visit before Run6

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Daily Reports

Mon 03/06

Left Grenoble by car in the morning. Andrea, Alain, Alessandro. Reached the telescope at 20h30.

Tue 04/06

During the maintenance craned up again NIKA, installed. Warm impedance test: 20mbar/min at 3 bar

Start cooling down at 13h30.

Test with VNA at 300K:

Figures: VNA scans at 300K (0-8GHz). Left: 1mm array; right: 2mm array.

Installed the electronics with the cables.

Figures: NIKA installed again.

We have also visited the back of the antenna and in particular the receivers cabin roof for possible installation of the NIKA-2 electronics. Space available is 80cm (H) x 200cm (Width) x 100cm (Depth). In order to have enough space to work, we will use a maximum depth of 60cm. The total COAX cables length if this solution is chosen is 6-8m.

Figures: Cabin top, possible place for NIKA-2 electronics.

Cryostat temperatures at 18h (T0 + 4h30). 4K: 255K (14K/h slope); Still: 235K (35K/h slope); R_BM: 1011 Ohm.

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-''figures: NIKA installed again''
+We have also visited the back of the antenna and in particular the receivers cabin roof for possible installation of the NIKA-2 electronics. Space available is 80cm (H) x 200cm (Width) x 100cm (Depth). In order to have enough space to work, we will use a maximum depth of 60cm. The total COAX cables length if this solution is chosen is 6-8m.  

{{attachment:roof2.jpg||width=600}}

''Figures: Cabin top, possible place for NIKA-2 electronics.''

'''Cryostat temperatures at 18h (T0 + 4h30). 4K: 255K (14K/h slope); Still: 235K (35K/h slope); R_BM: 1011 Ohm.'''