 Mon Mar 5 14:59:41 2007, Doug Preddy, Maintenance, Password
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On the weekend someone used this log to send spam messages. I have
installed a password for the write privilege. Please contact me at 6399
for the password.
Doug |
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Fri Jan 26 15:10:37 2007, Doug Preddy, Maintenance, new control computer installed
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I have installed a new control computer at the M9 solenoid control panel |
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Tue Nov 28 10:32:04 2006, Doug Preddy, Quench Recovery, recovering after looong power outage
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The power has been out for about 24 hours. Recovering coldbox, solenoid and
beamline vacuum.PLC is down for the vacuum system. Started compressor and
am flowing warm helium through the soleniod to warm it up while the vacuum
recovers. |
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Wed Nov 15 17:05:49 2006, Willy Andersson, Quench Recovery, powerleads cold, energizing solenoid
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Powerlead temperatures have bottomed out, energizing solenoid to 300
amps, ramp rate 60. |
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Wed Nov 15 13:56:00 2006, Doug Preddy, Quench Recovery, switch to series mode
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Wed Nov 15 11:09:28 2006, Doug Preddy, Quench Recovery, Compressor tripped off
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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. |
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Tue Nov 7 10:35:32 2006, Doug Preddy, Normal Running, Maintenance day
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I ramped down the solenoid power suplly and shut off flow to the power
leads. I will allow them to warm up and (hopefully) recover the flow rates.
I am also regenerating the M9BCP@ cryopump. |
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Fri Nov 3 12:09:51 2006, Doug Preddy, Normal Running, Fine tuning
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The power lead temperatures have been climbing at a rate of ~ 0.02K very 8
hours. The negative lead started to show some rippling this morning. The
positive flow had dropped from >250mm to 240mm. I cycled CV142 and the
temps dropped slightly. The negative ripple is gone and the positive flow
is back to >250mm. |
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Tue Oct 31 08:37:34 2006, Doug Preddy, Quench Recovery, Energizing solenoid
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Tue Oct 31 05:36:14 2006, Doug Preddy, Quench Recovery, switch to series mode
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Tue Oct 31 03:52:29 2006, Doug Preddy, Quench Recovery, power lead quench at 2:30 this morning
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Compressor still on. Starting flow to solenoid |
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Thu Oct 26 14:14:57 2006, Doug Preddy, Quench Recovery, power lead quench
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solenoid tripped on power lead temp. I was here and caught it. System
cooling. |
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Thu Oct 26 11:45:22 2006, Doug Preddy, Quench Recovery, Solenoid cold
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power leads cold 50% liquid.
Turning on power supply |
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Thu Oct 26 08:18:10 2006, Doug Preddy, Quench Recovery, switched to series mode
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Switched to series mode at about 7:45. |
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Thu Oct 26 04:34:15 2006, Willy Andersson, Quench Recovery, Still in // cold return mode.
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Leaving system cooling in // cold return mode, cooldown rates still good.
Had flow on to powerleads since re-starting cooling flow to solenoid.
Either I (when I return to work later this morning) or Doug will do the
switch to series mode. |
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Thu Oct 26 04:27:31 2006, Willy Andersson, Quench Recovery, Powerlead overtemp
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02:30 this morning got page from operations.
Looked at system online, appears that there was a powerlead overtemp
that caused the quench. Compressor still running. After arriving to
work set system to // warm return mode to cool down transferlines. Lhe
level starts to boil away. Switch to // cold return mode. Discovered that
seem to get better cooldown rate by not opening supply valves to solenoid
fully. // cold return valves are fully open but both CV143 and CV146 are
only open to 0.55 giving mu1 and mu2 inlet pressures of 2 barA. Getting
good cool down rates and even building LHe level.
04:25 C1 down to 8K, C12 at 7.5K, C6 at 7.5K, 6KS_M at 10.5K |
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Sun Oct 15 07:09:41 2006, Other, Normal Running, cryopump bcp2 trip
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Donald Arseneau reporting
Not really solenoid realated, but FYI...
The cryopump bcp2 stopped working and the vacuum valves tripped.
When I came in, the CP was over 200K and the pressure (bcg4) read
over 200 torr, with the CP nominally on. I switched it off and
continued warming; pumped it out; and am now re-cooling. It seems
to be normal so far.
-D |
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Thu Oct 12 19:54:10 2006, Willy Andersson, Quench Recovery, Energized solenoid.
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Switched to series mode about 6 hours ago. Cooling continued including
power leads until LHe level at about 50% and powerleads appeared stable. |
 Fri Oct 13 00:13:57 2006, Experimentor, Quench Recovery, Energized solenoid.
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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. |
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Thu Oct 12 11:53:04 2006, Willy Andersson, Quench Recovery, Compressor trip, 09:50 this morning.
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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. |
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Thu Oct 5 14:53:54 2006, Doug Preddy, Start Up, Switched to series mode
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