About two days ago, the temp of REF3_50K_HEAD showed ~ 10K enhancement up to ~92K from 82K, then the vacuum level at IXA became 5x10^-6 to 1x10^-5Pa.
The temp at the top of the outer shield in IXC is around 167k which is comparable with the temp of EXC's same position (165K). Not only at this position but also at other positions, temps are around 170K which is a critical temp for H2O.
Fig.3 shows the Qmass data. N2 is the main increasing component. H2O is constant.
Fig.4 shows the ~4-month trend after starting cryocoolers for 2-layer radiation shields. Both cryocoolers seem to show temp enhancement. However, one 50K Head (REF1) is now on the recovery, while the other(REF3) shows strange oscillation.