Main INDEX
Monthly INDEX
PREV
NEXT
Make New Entry,
Make Followup Entry
User name jpchen
Log entry time 15:58:45 on November 5,2010
Entry number 338676
keyword=15K supply and target vacuum
Earlier, after Hall C switched to cold return, there were large fluctuations in 15K supply. At one point, supply temperature went to
35K and return to over 60K. Our target warmed up significantly.
Scatterieng chamber vacuum went over 10-4, tripped the beamline valve
and the cold cathode gauge. I wentinto the hall reset the gauge, it was reading 8*10-5. Things have been stabalizing and 15K coolant came down nicely. Vacuum came down to below 10-5.