Daily reports
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Thursday 8 November 2012
Alessandro and Martino driving from Grenoble to Granada with the electronic equipment (NIKEL et al.)
Friday 9 November 2012
Cryocooler started. Unfortunately the 3He pumps makes very strong vibrations in the cabin possibly affecting GISMO observations; that was not a problem as long as the weather was to bad for observations, but the forecast was good for the night, so we stopped the pump in the evening. Hopefully the pump is not mandatory for the 1st phase of the cooling process.
Saturday 10/11
The NIKA cooldown is not suffering from the pump stop. The inner parts of the cryostat are also cooling down in some way. At mid afternoon the cryostat is below 8K. However we can start the dilution only if the 3He pump is switched on. If the weather degrades again so much that the observations with GISMO are not possible any more we will switch on the pump, otherwise we have to wait until Tuesday.
Alain and Juan have been testing the NIKA software remotely, sneaking the Elvin messages from the GISMO observations.
Sunday 11/11
Snow; GISMO can't observe, so we turned on the 3He pump in the morning to proceed with the cooling process. The 3He-4He dilution started in the afternoon. ~250 mK near midnight.