These are just memos for vacuum and cryocoolers' performance for ~ a month.

Fig1, 2, 3, 4 correspond to EX, IX, EY and IY. Fig.5 is vacuum levels.

EX and IY cryocoolers seem to show characteristic fluctuation around 20K~30K. IX performance is the best. EY seems to be stable after some fluctuations. Whether the fluctuation exists or not, the stable averaged temp around 30K at cryocoolers' heads and 8K shields is very important to avoid H2O release because of drastic temp enhancement as in the past case.