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Size: 1158
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Size: 1158
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Friday 14th February 2014
Xavier and Alessandro arrive at the telescope. Made a new parameter file FOR THE 2MM array ONLY (definitely need the sky for the 1mm).
Old configuration (2mm): DAC gains: 20-23-20-28-35. General niveau: 5.
New configuration (2mm): DAC gains: 20-23-20-38-55. General niveau: 5. Pixels 17-25: niv 6. Pixels 55 to 56: niv 6. Pixels 73 to 78: niv 4. Pixels 96 to 108: niv 6.
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Figure. Left: old config, right: new config. MADE WITH WINDOW ON CRYOSTAT, TO BE CONFIRMED (see tomorrow) WITH LN2. DON'T USE THIS BRAIN!!
Strong (strange) 12Hz noise on some (e.g. 4-5) pixels.
Saturday 15th February 2014
8h00. Theoretical start of the run. Winds peaking at 40m/s, telescope stopped probably the whole morning.
9h. LN2 in front of the cryostat window to play at least with the resonances. "Decalage" found by the new "restore tones" is good. -22kHz and -1KHz at 1 and 2mm respectively, indicating that the param file run8.txt is well representative of LN2 temperature.