IX_REF1_4K/50K temperatures drastically increased, as shown in Fig. 1. We will continue to monitor. As you know, REF2/4 coryocoolers are also not working in IX. So the situation is getting worse. REF3 is the only cryocooler that is working well in IX.

The vacuum level enhancements came  from N2, CO2, and Ar from the REF4_4K_HEAD because its temperature exceeded ~ 28K.