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CRY (Cryostat EX)
takahiro.miyamoto - 15:05 Friday 13 July 2018 (5527) Print this report
X-end cryocooler ON

[ Takahashi(ICRR), Miyamoto ]

we found the cryostat leak, however we can turn on the cryocooler at the current pressure level(~0.008Pa).
Therefore we turned on the cryocooler at 11:25 (2018-07-13).
Now payload temperature is ~295K.

I uploaded the pressure vs hour graph of last time and this time.
In this graph, I arranged the y-axis and x-axis by the parallel displacement.
Point (1hour,10Pa) is the moment of turning on the turbo pump. 
According to this result, we found the leak.

Point (1hour,10Pa) is the moment of turning on the turbo pump. 
Images attached to this report
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