Solenoid tripped on a power bump at 18:40 Tuesday
-- Donald Arseneau

Donald Arseneau reporting.

It is looking pretty good, so I came back in with the intent of energizing 
the magnet.  Doug should be up now or soon, so I'll wait a little for you 
to see this.  If you do, call the m9 counting room 222-7379.  After waiting 
a while, I will just forge ahead.

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.

http://isac.triumf.ca/m9sol/
Chris has set up the M9 solenoid e-log at the above web address. Play with 
it and let me know if it breaks. 

> I had distributed this list by email earlier this month. I have added
> a few items at the bottom. I am posting it on the M9SOL Elog under
> Maintenance. Some of the items may not be achievable or practical but
> I thought it would be a useful first attempt at a To-Do list.

A couple of other things to add:
Rebuild cooling water circulation pump with new seals and bearings.
Add air bleeds to the copper nonactive water lines.
Doug

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.

Purifier run over the weekend. Both LN2 dewars empty, but purifier cold. 
Disabled CV211 and flowed all charge gas through purifier. Started turbine 
at 11:00am. set strip tool to monitor temps. Started M9BCP2. Pumped out 
beamline between BV% and BV7. Opened BV6.

Temps in solenoid are equalling out. Increasing PIC229 to 11 bar. 

PIC229 at 11 bar. Changed strip tool to 15 sec increments.

Changed to parallel cold mode at 9:30.
At about 4:30 the city water chiller was turned on. The air compressor had 
also tripped off. It was reset and restarted.

Closed cv155

Switched to series mode.

Added two bottles of UHP helium to buffer tank.
Had no liquifation rate, so optimized Ti121 and HIC141 . Finally put TIC121 
into manual mode at 0.65. Power lead fluctuation died out and liquid 
started building. 
This morning changed TIC121 back to auto mode and played with it's setting 
to minimize the power lead and TI121 ripples. 
TI121 ripples seem tied to power lead ripples.
System seems stable enough to energize the solenoid.

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

Switching over to series mode.

Throttled back the LHe in until the power leads started to warm. My goal is 
to flow "warm" gas (hopefully 80K) through the leads to drive any frozen 
impurities out.

Power leads are being monitored with the strip tool graphs. I saw the temps 
go from having a ripple to almost no ripple, but starting to increase in 
temperature. I also noticed that the flow had dropped to 200 mm. I power 
cycled hic142. This resulted in an immediate drop in temperature, an 
increase of flow to 250 mm, and a slight drop in the LHe level. The temps 
seem to be stable, with only a slight ripple.

Same story as yesterday. Ripples dieing out, flows down to <200 mm, temps 
increasing. Turned HIC 142 down to 0.4 then back up to 0.75. Temps dropped 
quickly. Then turned HIC 142 to 0 and back to 0.75. Temps dropping, flow > 
250mm. Did not let negtive lead >10K, so would not have caused a trip.

TIC 121 into auto mode. 

Solenoid quenched due to power leads at 9:00 tonight. Restarted flow in 
parallel warm mode.