Switched to series mode about 6 hours ago. Cooling continued including 
power leads until LHe level at about 50% and powerleads appeared stable.

Hi there,

This is Khashayar (experimenter). Lookin at all different temperatures and 
levelson the monitor, it seems everything is stable now. I wonder if you 
could let us know what time we can have beam again? Would you please send an 
email to kghandi@mta.ca if you know the answer? You can also reach me at my 
cell# (506)961-0802 any time.

Thanks

Khashayar

> Switched to series mode about 6 hours ago. Cooling continued including 
> power leads until LHe level at about 50% and powerleads appeared stable.

Powerleads appear stable.

I would have made an entry when it died, but-----

Now in full // cold return mode.
Had just talked with Curtis, He said thta he has already informed the 
experimentors that the solenoid will not be ready until tommorow, so he 
suggests leaving the system in reduced // cold mode overnight.

Two power bumps tonight. Everything tripped of. Restarted cooling water 
pump, diff. pump under solenoid etc. Computer stayed on! Starting 
compressor.

(Sat night/Sun AM) Helium temperature started oscillating, so
powered off magnet (precautionary) and cycled valve 142 (at 04:12).
Small oscillations begin almost immediately, so close and open
the twist-knob for 142.  Works better.

Due to curent lead temperature occilation Doug recommended warming up the 
current leads.

The leads were warmed up this morning then cooled back down. Power supply 
is ramping up now.. 2 1/2 hours start to finish.

Raised PIC229 to 11Bar. Started to close HIC155. Cooling rates improve.

At about 09:30 this morning I noticed the sound coming from the compressor 
building seemed louder than usual. After entering the building I noted that 
the compressor was unloaded to about 50% and the compressor suction was 
running at about 15 psig. Down at the SULZER panel the solenoid vacuum 
system was tripped off, the flow was still in series mode but no LHe level,
solenoid temps at over 40 K. Contacted Doug. Cannot figure out why the 
compressor was unloaded to 50 %. Solenoid had not tripped on bad vacuum 
because jumper was still on PIC901. Doug mentioned there was a power bump 
yesterday at about 15:00. May be when the vacuum system tripped but does 
not explain the compressor unloading.

Doug restarted vacuum system. I stopped flow to solenoid. Stabilized 
pressures. We checked the compressor to try to see what would cause the 
Unloaded state. Could not see any oil leaks. 

Back at Sulzer panel loaded compressor to 100 %. Stabilize pressures. STart
cooling flow to solenoid, // warm return. Adjusting turbine speeds and 
shield heat as required. Switched to // cold return flow after solenoid 
temps down to TIC 121 temp of about 20 K.

Got a call at about 10:00 this morning, the whole system had tripped off. 
No power bumps or other disturbances. When I arrived the only fault 
indications were "ColdBox Trip" light on the compressor panel and on the 
QRL panel the red "ColdBox" LED was ON. On the SULZER panel the 
yellow "Cryostat Quench" light was ON. On the First Trip logger #1 and #15 
LED's were ON. But no indication about what the actual fault was. Cooling 
water OK, compressed air OK, compressor ventilation OK. Outside ambient 
temperature was cooler than we had last week. BIG1 was off but when I 
turned it back on the vacuum looked good but was slowly rising as the 
solenoid warmed. I put the jumper on the vacuum controller. Prepared system 
for re-start.

Started compressor. Started flow thru coldbox. Raised discharge pressure.
Started turbine flow. Didn't get any freezing but it seemed that T1 speed 
wandered slowly +/-0.1k rev/sec when it got up to about 3.6k revs/sec, but 
this only lasted for a second or two. Not sure if I was just seeing things.
Got turbines up to speed and started // warm return flow. Solenoid had been 
running at 500 Amps and when it quenched and sat warming it had warmed to 
about 40 K. Switched it to //cold return too soon and solenoid started to 
warm slightly. Back to // warm return mode. Had to throttle flow thru 
solenoid with warm return valves to get effective cooling. If had return 
valves wide open TI121 would warm up too much. Discovered that if I 
throttle the flow out of the solenoid slightly then TI121 would fall and 
solenoid would start to cool. Less flow gave more cooling. Don't quite 
understand that one. Switched to // cold return mode when solenoid temps 
falling below 20K.

About 15:00 stable // cold return cooling. Going home for a while.

19:30 solenoid temps bottomed out at about 11K. Switch to series mode. 
Something strange about the first trip detect. I reset it once and when I 
checked it an hour or two later it showed a trip on #1 and #15 LED's even 
though nothing had happened. Something must be causing false indications.

20:15 series cooling, solenoid temps at about 6K, LHe level rising slowly 
at about 10%. Removed jumper on vacuum controller.

No indicator lights etc as to why the compressor tripped. The only  light 
was a cold box fault. I had to shut off the main breaker before the 
compressor would come back on.
Started cooling in parallel  cold return.

Compressor tripped this morning at ~8:45. I restarted the compressor, but 
turbine 1 would not spin up. I let it warm for an hour and it started. I 
started flow to the solenoind in parallel cold return.

Main compressor tripped, refrigerator shutdown. Checked with experimentors 
and main control room, no indications of power bump etc.

Restarted compressor, // warm then // cold return. One of the MV5x valves 
frozen open, had to de-power valve  a couple of times to get it to seal.

Recovered the vacuum in the solenoid, then started the compressor.
Started flow to solenoid in parallel warm return.

compressor off due to cold box trip at 6:00 this morning. Restarted system 
and started flow to solenoid in parallel cold return.

Yesterday and today there have been a number of changes made to the M9 
Vacuum control computer. The computer now automatically boots up to the 
Epics control page. This logbook is also automatically started.

Changed to series mode.
Liquid level building.

PIC 229 was down to 10.8 bar this morning. PIC 229 was trying to open CV211 
to charge the system. I realized that in restoring the control to CV211 I 
did not get the wire into the connector properly. Went back up to the 
compressor building  and reconnected the control wire to CV211. pressure is 
back to 11 bar. TI121, LHE in and liquid level ripples are now all reduced.

System was ramped up to 500 amps yesterday at 14:00

CV155 closed.
Temps about 15K