| 0244 | Added 1mbar He-4 exchange gas to IVC. Started pumping exchange gas out at 15K. Temperature now 4.4K. Initial He transfer pressure 1psig. Later increased to 1.5, 2, and 3psig to finish it faster. It seems to me 1psig at the beginning and 2psig at latter half is a good choice if time permits. |
| 0248 | Filled N2 cold trap. |
| 1418 | MC X12004 = 5.54K. IVC P=7.4e-7mbar. G1=0.1mbar, G2=605mbar, G3=0mbar. P1=0.012mbar, P2=0.017mbar. |
| 1424 | Filled N2 cold trap. |
| 1431 | Close IVC, start 1K pot, start condensing mixture. |
| 1528 | Stop condensing. Start circulating mixture. |
| 1552 | Mixture is in full circulation. V14 was opened at the end of the condensing stage and left open from the beginning of circulation. |
| 1607 | Close V14. |
| 1655 | Powered up DCRC boards. A temperature spike showed up. |
| 1659 | Started flashing detector. |
| 1706 | Flashing both boards, temperature 132mK. |
| 1713 | Turned off DCRC30. Tower temperature became 128mK. |
| 1716 | Stop DCRC33 flashing. Tower temperature starts to drop. |
| 1722 | Tower temperature only rose to 87mK while flashing DCRC30 alone with 0.8mA bias on LED1&2 with 100us on and 5000us off. The two LEDs on this DIB didn't seem to work as properly. |
| 1737 | Tried DCRC30 with two different POEs and the same problem remains. |
| 1926 | The waveform of LED1 and LED2 output looked fine on the scope. No sure what the difference is in the LEDs. Keep flashing using the old settings. |