Fridge is at base temperature of 35 mK. No temperature spikes since Friday afternoon and looks quite stable.
-
Recall that the two changes that we tried during the last warmup are: 1) tightening the bolts on the bottom plate of the MC (opening uptil the middle section of the IVC) and 2) Checking the o-rings on the needle valve.
Connected the DCRCs and check the phonon channels yesterday. DCRC1 and DCRC3 shows noise traces with a few non-functional channels which were earlier noted during electrical checks as well.
Connecting both the above DCRCs increase the fridge temperature from 35 mK to 41 mK.
DCRC4 has not shown any traces. Once pA and pB showed noise trace, but pD didn't and I tried power cycling it but didnt get it to work again. Will do more power cycling today. This DCRC has this type of issues even in last run and then it works fine.
With the working DCRCs, took a couple of IbIs traces and processing it. Plan is to see all Side2 phonon channels and the two Side1 phonon channels in transition by tomorrow when Anthony will discuss the run plans.
