| 0002 | ANV ugh, is this supposed to roll over to next run diary page? Anyway, I stopped flashing after plateau at about 280 mK. |
| 0040 | ANV started up last run of the night, will let it go for about 30 minutes, then stop it and leave |
| 0111 | ANV stopped current run and zero'd the charge bias and did a flash. I'll just turn off the LEDs then leave. |
| 1203 | ANV came in to do some more running, start with a flash – checked that biases are still zero |
| 1230 | Fill LN2 cold trap full. |
| 1300 | Start LHe transfer (38.6%). |
| 1336 | End LHe transfer (95.7%). |
| 1400 | ANV tried taking out the 88Y source and 133Ba source to look for saturation and gain matching in 07150620_1402 |
| 1435 | ANV flashed the detector for a Ba run since the gains seemed roughly matched and no saturation was evident |
| 1528 | ANV start a Ba run with the source about 1 m from fridge at detector level |
| 1640 | ANV end Ba run, it was longer because I got lunch |
| 1807 | ANV finished flashing and cooling and started a new Ba run … time flies! |
| 1842 | ANV finished second Ba run, flashing now. Plan to cool down and put Cf source on dewar in hopes of activating the 10 keV |
| 1843 | ANV btw, the activity of the Cf source was quoted at 10 uCi in 2010 (June 1), the half-life is 2.65 y so that means the source is about 2.5 uCi now. Probably we should get another stronger source, but we'll see if we can activate the detector by putting the source real close |
| 1846 | ANV me, Nick and Allison did tests earlier today that showed that the 88Y source did not seem to affect the rate much (not surprising it was 100 uCi in spring '13 but the half-life is only like 100 days. So it's been about 7 half lives so that puts this source down at about 780 nCi, pretty small). The Ba source did affect the DAQ by making the rate GO DOWN, I guess this means it was increasingly dead – this is curious but maybe OK, we were looking at pulses at the time so that might have been part of it. |
