Fig.1 shows the present IM temperatures in all cryo-payloads. We noticed,
- The cooling performances of IX, in which two cryocoolers for its cryo-payload were ON and the heater was off, and of EY, in which one of the cryocoolers for its cryo-payload and heater were off, are too similar.
- IY cooling is steady and fast.
To explain 1, the cooling power for IX cryo-payload is the same as that in the EY case. So, one possibility is some trouble in one of the heat linking connections between the IX cryo-payload and the heat link wire suspensions. This might be related to the strange drift of the IX TM pitch that was reported by Yokozawa-kun.
