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User name jpchen
Log entry time 15:17:40 on June15,2004
Entry number 125857
keyword=He target operatinjg condition changed back to 6.6K and 172 psi.
Target operator called me earlier asking about alarms in temperature and pressure. Then I found from the target operator that the operating temperature was changed from 6.6 K to 7.4 K and pressure was changed from 172 psi to 220 psi by the target group. Appearantly Mike Seely was testing the condition with reduced cooling power to be ready for Thursday when Hall C will be back on line. I discussed with Bob Michael (run coordinator) and Bob felt that it's better to run with conservative condition (lower pressure) to avoid possible venting
if there is CHL fluctuation (which happened twice last Friday when
we ran the He target at 220 psi). So we changed the condition back to
6.6 K and 172 psi. I also informed Mike Seely (phone message) about this. We will appreciate in the future the target group can inform us
(me or the run coordinator) the changes they made to the target operating condition.