| | Setup: DIB1/3/4 → 3.2 MHz filters → cables → DCRC55(1)/DCRC33(2)/DCRCX(4) |
| 0857 | Tower/MC/Coldplate = 36.3/30.9/196 mK, Still = 1.3 K / 0.110 mbar, G1/G2 = 174/178 mbar, 1K Pot = 1.697 K / 30 mbar, Main bath = 31.5%. Boil off rate: |
| | Fill LN2 cold trap bath. |
| 1208 | Investigating spontaneous DCRC railing issues. Setup: Ethernet cables 1/2/3→DCRC55(1)/DCRCX(4)/DCRC50(3)→nothing/nothing/nothing Timing link connected with DCRC55(1)/DCRCX(4)/DCRC50(3) = master/slave/slave |
| 1213 | Start up MIDAS programs and SQUID tuning gui. DCRC1 phonons are ADC railed, DCRC3 phonons show noise/ADC sat, and DCRC4 phonons are ADC railed. |
| 1220 | Can see DCRC1 test signal on FB line. DCRC4 still seems ADC railed. DCRC4 signal does not respond to changing signal source/amplification/offset settings. Could be that it was railed and stuck in it's bad state from the beginning. |
| 1225 | DCRCs 1/3 still active, DCRC4 railed. All boards respond to telnet commands. Power down and swap ethernet cables. |
| 1228 | Setup: Ethernet cables 3/1/2→DCRC55(1)/DCRCX(4)/DCRC50(3)→nothing/nothing/nothing Timing link connected with DCRC55(1)/DCRCX(4)/DCRC50(3) = master/slave/slave |
| 1229 | All boards showed noise ~1 min after power up. Then DCRC4 railed at -0.0124V spontaneously. DCRC4 still responds to telnet, but trace output seems stuck. |
| 1414 | Commence LHe transfer. MB=22.2% |
| 1455 | Finish LHe transfer @ 95.0% |
| 1505 | Tower = 34.7 mK (with no DIBs plugged into DCRCs) |
| 1734 | Fill LN2 cold trap full. |