Main INDEX
Monthly INDEX
PREV
NEXT
User name jpchen
Log entry time 16:49:04 on November16,2005
Entry number 160369
keyword=completed cryotarget cooldown.
Completed cryotarget cool-down.
The target is now at 19K, 24 psi. Fan speed 91 Hz. Coolant flow
at 21g/s with HPheater power 440W, with ESR supply T=13.5K. (When
ESR supply temperature comes down, one can reduce the coolant flow).
This morning when ESR tripped, the H2 low pressure alarm went off.
During the cool-down, the low pressure alarm went off again. At the time the three pressure transducer readings were quite different:
26 psi, 22 psi and 15 psi!. I increased the fan speed from 60 Hz to 72 Hz, then the three pressure readings became closer to each other.
Now all are fine. (There were blockage in the loop at the time?).
Also Mike Seely fixed the problems with the loop 2 temperature sensor
(CERNOX_AFT and CERNOX_HX).