This is a strip tool  plot of the cooldown

Curtis switched to series mode last night at 7:00.
Startedflow to power leads at 7:00 this morning.

Solenoid temps were: C1 & C12 about 30K. C6 &C7 about 11K. Started flow to 
solenoid in parallel cold return. Jumpered out the vacuum gauge for the 
solenoid vacuum.

Started flow to solenoid in parallel warm return.

See attached file for a screen grab of temps.

started flow to solenoid in parallel cold return.

Started flow to power leads.
TIC121 into auto mode

Started flow to power leads HIC142 at 0.8. 

Solenoid cold. Buffer tank pressure ~3psi, so Kevin will add a bottle of helium. Started flow to power leads at 11:45

running purifier over weekend

And started flow to coldbox,solenoid in parallel warm return.


Tuesday evening theree was a 2 hour power outage 19:00- 21:00. No call 
made to M9 operator.
Wednesday tried to recover vacuum. Started cool down Thursday morning.

TIC121 was down to 27K
warm return valves were wide open
opened supply valves CV143 and CV146.
TIC121 went up to about 37K
Mu1 return temperature went down to about same temp as TIC121 so set Mu1 to 
cold return. Open CV145 then close CV151. Mu2 return was still > TIC121 so 
kept it in warm return mode. Adjust turbines as required.
After about 20 minutes Mu2 return temp dropped down to about equal to Mu1 
return temp of about 38K. Then set Mu2 to cold return. Open CV147 then 
close CV143. TIC 121 drops to 30 K. Even though Mu1 and Mu2 return temps 
greater than TIC121 I will keep it in //cold return mode to see if the core 
solenoid temperatures will start to fall. To maximize the use of the 
cooling from T2 outlet temperature CV155 is tweaked open to its maximum 
stable opening. This helps cool the lower heat exchangers. If this works 
then cr_c1 and cr_c12 should start to tick downwards. If they keep rising 
then have to switch back to //warm return.

The solenoid was pumped out Monday and yesterday after the quads just 
downstream of the solenoid were put back in place. The quad just 
downstream of the solenoid was remove to replace two coils on it. 
The cold box vacuum had tripped off some time in the last little while. 
Started it pumping on Monday also. The compressor was started Tuesday 
afternoon and flow was started to the solenoid. The purifier was 
regenerated and put on line in it's total buffer tank flow mode. The cold 
box was pressurized and the turbines were briefly spun up to check the 
operation of the new turbine speed indicator. It seems to be working 
properly. 
Flow to the turbines was started this morning and all went well. The speed 
indicator works properly. 
M9BIG1 started ot 6.6 x 10-6 before flow was started. One hour later it 
reads 4.8 x 10-6

Solenoid quench due to power bump caused by an airplane crash in Richmond at ~ 22:00. Compressor off. Water pump off. Restarted compressor at ~ 11:30. Cooling solenoid in parallel cold return mode by 12:15.

Solenoid quenched on power lead temps last evening. I am recovering it in parallel cold return mode. C12~60K C1~50K.

Powerleads seem stable.