| 0953 | Measured resistances across different QET bias channels as yesterday. DIB2 PA→PB was initially low (~1nS) then, when measured a few minutes later, was 23nS and caused 3.4mK temp spike Remeasuring ~10min later finds 40nS and temp spike. DIB3 PB→PC gives 3nS, then 7.75nS ~1 min later, then 5nS, no dramatic temp changes. DIB1 PA→PB behaves similarly: initially 1.1nS, then, after measuring other combinations, rise to 7nS. All other intra-DIB QET bias combinations still low (~0.6nS). |
| 1057 | Measured DIB 1/2 QI/QO bias→ QET A/B/C/D bias conductance and found all to be < 0.07nS. |
| 1445 | Commence recovering mixture into dump. V1,6,5,9 open so pumping fridge from both sides but LN2 trap is isolated. Turn on mixing chamber heater to 20mW. Close off 1K Pot and turn off He4 rotary pump. |
| 1450 | Fill LN2 cold trap full so whatever's inside of there doesn't expand too much until we can get a look at it. |
| 1500 | Tower = 1.35 K and steady, G2 (dump) 320 mbar and rising, 1K Pot 1.9 K, P1 (Still) 0.2 mbar and flat, G1 (condenser) 1 mbar and flat |
| 1600 | G2 (dump) 680 mbar and rising. 1K Pot 3 K. |
| 1610 | MC temperature suddenly rises, P1 (Still) falls, G2 (dump) increase slows. Most mix is recovered. |
| 1700 | Tower = 11 K and rising, G2 (dump) 792 mbar and flat, 1K Pot 4.5 K, P1 (Still) 0.016 mbar and flat, G1 (condenser) 1 mbar and flat |
| 1715 | Close condenser valve, V1, V5. Close still valve and V6. Turn off MC heater. |
| 1720 | Close V9. Turn off 3He pump. |