User name stevensm
Log entry time 13:59:14 on March28,2004
Entry number 117474
keyword=cooldownCooldown status:
Magnet: thermometer/ thermometer/
Lowest temp: Highest temp: Delta temp:
LSeptum t2/156 t1/169 13
LQ1 15/121 14/131 10
LQ2 14/169 12/190 21
LD1 28/135 27/155 20
LQ3
RSeptum tt4/177 t2/209 32
RQ1 12/147 15/149 2
RQ2 11/144 12/149 5
RD1 26/128 31/145 17
RQ3 14/179 12/196 17
Incoming helium temp = 60K
Only a few degrees progress since yesterday. The reason for that is because although Joe Wilson did come in and change the control point of CEV6711A to 60 degrees (per my request), the valve was limited in its travel to 12 per cent, which was insufficient travel to deliver the lower temperature. Our average incoming gas temperature overnight was about 90K. I called the duty cryo tech again and asked him to increase the travel of the valve, which he did. I will check the cooldown again this evening.
FIGURE 1
FIGURE 2
