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'''Arrays status''': 128 pixels 2mm - <1Hz/sqrtHz noise; 201 pixels 1mm about 10Hz/sqrtHz noise '''Arrays''': 128 pixels 2mm - <1Hz/sqrtHz noise; 201 pixels 1mm about 10Hz/sqrtHz noise

Back to the NIKA run 7

November 11th 2013, Alain Benoit, Martino Calvo and Andrea Catalano come to the 30m to install, cool down and testing the NIKA prototype.

12-13 November 2013: cryostat and Read-Out positioning in the cabin, cooling down, HWP Modulator installation at the pupil (120mm from the entrance lens of the cryostat).

14 November 2013: OTF geometries on Mars and Uranus. Check of the focal plane geometry. First light of NIKA prototype with polarisation facilities.

15 November 2013: Cryostat back to 300K: 3He-4He mix recovery, heating trap. Polarisation facilities dismantling. Back to Granada.

STATUS

Cryostat Temperature: 150mK (set by temperature control).

Arrays: 128 pixels 2mm - <1Hz/sqrtHz noise; 201 pixels 1mm about 10Hz/sqrtHz noise

Modulation frequency: 8kHz 1mm, 4kHz 2mm

OBSERVATIONS Log

Opacity is measurd with the taumeter at 225 GHz

p2cor : 0

p7cor : 0

initial Focus : -2.40 mm

Scan

UT

Source

Command

Az

El

Pointing X, Y, Focus

Tau225

Comment

15

04h39

Mars

Track

0 , 0 , -2.4

0.15

16

04h45

Mars

OTF_Geometry

0 , 0 , -2.4

0.15

First map for choosing the reference pixels

17-21

04h58-05h04

Mars

Focus_Liss

0, 0, -2.4

0.15

22

05h05

Mars

Focus

0, 0, -2.4

0.15

23

05h47

Mars

OTF_Geometry

0, 0, -2.4

0.15

Tuning working during the map

211-218

21h34-21h57

Uranus

Track 300 300

55

190

0, 0, -2.4

0.00001

220-224

22h01-22h08

Uranus

Focus_Liss

0, 0, -2.4

0.00001

optimal focus probably over the range

225

22h10

Uranus

Cross

0, 0, -2.4

0.00001

226-230

22h12-22h18

Uranus

Focus_Liss

0, 0, -1

0.00001

set pointing Az=-12.8 El=3.8 set focus = -1.5

231

22h24

Uranus

OTF_Geometry

-12.8, 3.8, -1.5

0.00001

232

22h49

Uranus

OTF_Geometry

-12.8, 3.8, -1.5

0.00001

HWP+Pol

241-245

23h34-23h47

other observing

various

HWP+Pol+Cryostat in the cabin environment

FIRST RESULTS

focalplane.png

Figures: Focal Plane Geometry derived using scan 16: we chose the following reference pixels: 491 for 2mm array, 5 for 1mm array.

1mm.png

Figures: 1mm array from scan 231.

2mm.png

Figures: 2mm array from scan 231.

pol1.png pol2.png

Figures: Entire (top) and zoomed (bottom) Timeline of the scan 232 on Uranus in configuration NIKA + HWP-Pol

Further results on polarisation measurements will come soon.......

PrepRun7 (last edited 2013-12-19 15:38:09 by NikaBolometer)