NIKA October 12th, 2015 / S4

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2015-10-12


Following not updated

.Cryostat Temperature: 170mK cooling down slowly

Modulation frequency: 10kHz 1mm, 5kHz 2mm

Opacity is measured with the new taumeter at 225 GHz

Nasmyth offsets : 0, 0

Set Focus : we start at -2mm (not at all optimised, first task is try to improve on this!)


Data Repository: /home/nika2/NIKA/Data/run13_X/scan24_X

Scan

UT

Source

Command

Az

El

Pointing X, Y, Focus

Tau225

Comment

12

12h10m

Mars

Track

240

46

0,0,-1.3

0.3

going on source, checking that tuning is ok...

13-17

12h14m

Mars

Focuslissold

240

45

0,0, (-1.3 -1.9 -2.5 -0.7 -0.1)

0.25

start with a focuslissold : pb, no good data (disk not mounted)

18-22

12h14m

Mars

Focuslissold

240

45

0,0, (-1.3 -1.9 -2.5 -0.7 -0.1)

0.25

no subscan gt 0 and very small data recorded ?

23

12h14m

Mars

pointingcross

240

45

0,0, -1.3

0.25

ditto

24

12h14m

Mars

pointingcross

240

45

0,0, -1.3

0.25

ditto

30

13h08m

Mars

pointingcross

240

45

0,0, -1.3

0.25

ditto

31

13h08m

Mars

pointingcross

240

45

0,0, -1.3

0.25

Ok, data are finally coming! Alain repaired a problem in the C read_data procedure as well as a bug in the tuning. Great!

32-36

13h30m

Mars

focuslissold

258

30

0,0, -1.3

0.3

Focus seems better towards high values..

37

13h40m

Mars

focuslissold

258

30

0,0, 0

0.3

Canceled! Doesn't like to have focus set to 0...

38-42

13h43m

Mars

focuslissold

258

28.5

0,0, 0.1

0.3

New focus procedure centered on 0.1

43

13h53m

Mars

focusliss

258

26

0,0, 0.1

0.3

Seems the focus is ok around 0.1! We see a nice parabola. Going on to try a geometry

44

13h59m

Mars

otfgeom

258

25

0,0, 0.1

0.3

First we try a small geometry of 240"x240" to verify everything is ok.

45

14h13m

Mars

beammap (part1)

258

22

0,0, 0.1

0.4

We try a full beammap. Sadly tau is increasing and the elevetion of Mars is now 22. We'll see!

46

14h28m

Mars

beammap (part2)

258

~19

0,0, 0.1

0.5

47

14h43m

Mars

beammap (part3)

268

16 (!!)

0,0, 0.1

0.65

Weather getting worse again..

NK2015_Oct12 (last edited 2015-10-16 10:52:57 by NikaBolometer)