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| Deletions are marked like this. | Additions are marked like this. |
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| Pre alignment done. Photos to come. M4 holes so that it is blocked at the new position. |
{{attachment:cooling_total.png|width=350}} {{attachment:cooling_finalpart.png|width=350}} We took a ~1-2h slot in the evening to do the pre-alignment in order to set the final fixed position of M4 for NIKA, and drill holes in the M4 mount in order to screw the locking component. |
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| {{attachment:cooling_total.png|width=350}} {{attachment:cooling_finalpart.png|width=350}} | Photos: The 3He gas stock for the dilutions stored in the cabin between the elevation motors box and an electric box, the NIKA electronics on top of the cryostat and the dilution circulation unit, laser alignment to define the definitive fixed position of M4 matching the best position of NIKA in the cabin, marking the place for the locking component on M4, drilling holes for the locking component, and Alain doing acrobatics to help blocking M4 at the right position. {{attachment:10_NIKA_3He_gas_stock.jpg}} {{attachment:11_NIKA_electronics.jpg}} {{attachment:12_NIKA_electronics_and_mirrors.jpg}} {{attachment:13_laser_alignment_to_set_M4_for_NIKA.jpg}} {{attachment:14_marking_locking_component_place_on_M4_for_NIKA.jpg}} {{attachment:15_drilling_holes_of_locking_component_on_M4_for_NIKA.jpg}} {{attachment:16_Alain_acrobat.jpg}} |
Daily reports
PLEASE KEEP THE ANTI-CHRONOLOGICAL ORDER TO AVOID ENDLESS SCROLL DOWNS :)
Wednesday 30-05-2012
Cooling down is going according to plan. Better overall cooling speed compared to the last 'critical' run we had in Grenoble. But let's see what happens, Alain is planning to start condensation overnight. To get an idea, below the screenshots of the cooling down so far.
We took a ~1-2h slot in the evening to do the pre-alignment in order to set the final fixed position of M4 for NIKA, and drill holes in the M4 mount in order to screw the locking component. Working on the software, data transfers, and procedures.
Photos: The 3He gas stock for the dilutions stored in the cabin between the elevation motors box and an electric box, the NIKA electronics on top of the cryostat and the dilution circulation unit, laser alignment to define the definitive fixed position of M4 matching the best position of NIKA in the cabin, marking the place for the locking component on M4, drilling holes for the locking component, and Alain doing acrobatics to help blocking M4 at the right position.
Tuesday, 29-05-2012
We only had access to the telescope this morning at 10.30 and started to install all the hardware. It took us until the end of the technical time (16:30) before being ready to cool down; installation a bit longer than we expected with some minor problems to solve (e.g. pressure in the anti-vibration table, the data acquisition computer which died, etc.), but at the end of the day we are nearly there: cooling has started, and the work on the NIKA network is ongoing.
Monday, 28-05-2012
Alain, Xavier, Samuel and Nico took the plane from Lyon to Granada. Juan picked them up at the aiport and drove all of them up to the observatory. Everybody was happy to be there for dinner and taste Maria-Carmen's special pasta. Poor Philippe and Martino arrived around only around 11pm after a 18 hour road trip. We unloaded the truck and started to plug in computers.
We had the visit of a fox in the evening (photos to come) and from local wild goats. As you can see, the weather is quite nice for now.
Friday 25-05-2012
NIKA was moved into the truck. Early start on Monday for Philippe and Martino.
Saturday 19-05-2012
Je suis a 490 MHz sur la click FPGA soit un bin de 1.869 MHz je mets 50kHz de deviation modulation sur les 2 bandes matrice A : 1mm : 2.288149 GHz dac 3db HF 0 db sortie 10db - 1 ampli matrice B : 2mm : 1.3013 GHz dac 3db HF 20 db sortie directe - 1 ampli
12h51m11_0001_T scan table xy pas 5mm et 20% (50x50)
13h02m45_0002_B un balayage complet des 2 bandes la 1 mm a beaucoup bouge : je recherche les résonances sur les 2 matrices 13h29m01_B Je relance un balayage 13h31m01_0004_T puis une carte scan table xy pas 5mm et 20% (50x50) 13h48m41_B balayage complet la 1mm est montee en frequence de 110 KHz : je recentre la 1mm et ne touche pas a la 2mm
- petit balayage sur les 2 matrices pour recentrer le bins
13h58m01_0005_T Nouvelle carte avec un pas plus faible (3mm)
- mesures de bruit
14h22m30 balayage complet pour regarder les derives: la 1mm est montee de 140 kHz (on est a 181 mK en train de refroidir lineairement 5mK par heure 14h30m57_0006_T encore une carte pas de 5mm apres un reglage pour voir la stabilite de la photometrie
- Il y a des sauts dus à des erreurs sur la roach A (pas d'erreur sur la roachB) : je fais kill dhclient3 (3304.3)
14h40m20_0007_T Un petit balayage et je refaits une carte : a priori, plus d'erreur et plus de sauts
14h47m50_T 14h50 : corps noir a 12.32 ohm : je chauffe a 20V 1.3A puis 30V 2A
- 14h56 : corps noir a 13.09 ohm puis ca refroidis a nouveau 14h58 : j'enleve le bras et la bille puis je passe 2 fois une feuille de polystyrene mesure de bruit
15h10 : je baisse la puissance de 5db sur la matrice A : dac 3db HF 5 db sortie 5db - 1 ampli
- la frequence monte encore de 250 KHz : je recentre les resonnances qui sont plus belles
15h18m35_B Un balayage complet matrice A 15h20m08_B un petit balayage pour verifier et recentrer 15h22m50 2 passages d'une feuille de polystyrene puis mesure de bruit
Monday 14-05-2012
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