SatoshiTanioka - 11:12, Thursday 16 January 2020 (1970)
Cooling down test
Since the pressure reached 6.5*10-4 Pa, I turned on the refrigerator.
It seemed working and I left it running.
Comments related to this report
SatoshiTanioka - 20:34, Saturday 18 January 2020 (1974)
After 2.5 days cooling, the cryostat reached the temperature ~60 K.
This value is my guess because the sensor had some problems and it showed higher temperature than actual.
Anyway, the refrigerator worked well though longer cooling time than before.
This is due to some insulators were not installed inside the chamber...
But it can be cooled down at some extent and I gonna do with this configuration.
After 2.5 days cooling, the cryostat reached the temperature ~60 K.
This value is my guess because the sensor had some problems and it showed higher temperature than actual.
Anyway, the refrigerator worked well though longer cooling time than before.
This is due to some insulators were not installed inside the chamber...
But it can be cooled down at some extent and I gonna do with this configuration.
I turned off the refrigerator around 20:20.