 Sat Oct 16 17:13:19 2004, Other, , s
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s |
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Sat Oct 16 17:18:50 2004, Other, , lame
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 Sun Oct 17 04:26:29 2004, Other, Start Up, cycling 142 when temp hit 10.68
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> I tried cycling the valve twice -- at about 11:30 and again around 1:00,
> trying both the buttons and the dial -- but it has had no effect on
> the temperatures (aside from the transient spikes). That might be
> bad. We will have to see if it altered the trend.
>
> --
> Donald Arseneau
It did -- temperatures held stable for several days |
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Sun Oct 17 05:03:13 2004, Other, Start Up, Cycle valve after oscillations begin
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(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. |
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Wed Nov 24 07:28:30 2004, Other, , Mission Impossible
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Wed Nov 24 07:28:38 2004, Other, , Mission Impossible
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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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Fri Apr 27 10:16:44 2007, Kevin Trithardt, Quench Recovery, Test
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Don't Panic -- There was no quench. I am testing the e-log.
I have added Kevin's name and e-mail to the M9 e-log. He will be e-mailed
when a quench recovery log is submitted. His name is also included in the
Author's list.
Thanks, Doug |
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Thu Jul 5 11:01:47 2007, Kevin Trithardt, Other, Current lead warm up
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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. |
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Tue Jul 31 07:53:57 2007, Kevin Trithardt, Normal Running, cycled power leads
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got a page for the power lead temp
came down and cycled the power leads.. did not seem to make a difference..
Kevin |
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Wed Nov 28 15:07:08 2007, Kevin Trithardt, Other, power lead regeneration
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Power leads cold again, power supply ramping up. |
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Mon Mar 29 09:25:52 2010, Kevin Trithardt, Start Up, Started cool down this morning
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Tue May 18 15:04:36 2010, Kevin Trithardt, Maintenance, Solenoid ramping up
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Sun Oct 10 17:36:35 2004, Experimentor, Start Up, power leads
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At 5:30 pm sundat, power lead temp is about 10.6K. script tool still
notworking
syd kreitzman |
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Mon Oct 11 03:56:14 2004, Experimentor, Start Up, cv142 valve
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noticed that the lead temp rose to 24K over the past 4 hours. had control
room personnle cycle the cv142 valve. temperature dropped.
srk |
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Mon Oct 11 11:49:34 2004, Experimentor, Start Up, cv142 valve
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noticed temp rise, which occured only about 5 hours after the
last "reset" .... the time between resets seems to be decreasing, which is
not a good sign.
had the controll room guys reset the cv142 valve (i.e. cycle it off/on)
syd |
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Mon Oct 11 22:32:11 2004, Experimentor, Start Up, cv142 valve
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temp of leads begins its exponential rise again (caught it at 12K), approx
11 hours after last reset. this time asked operator to shut off valve for
3 seconds, then turn back on.
previous recycle, asked operator to shut off valve for two seconds ... and
the warm up time was 11 hours.
previous^2 recyle, asked operator to shut off valve for 1 second ... and
the warm up time was only 4 hours.
Syd |
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Tue Oct 12 02:05:31 2004, Experimentor, Start Up, cv142 valve
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after only two hours since last lead cycling, they warm up quickly.
ops cycles the valve, but more quickly this time, off ... 1 sec ... on.
syd |
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Wed Oct 13 08:17:00 2004, Experimentor, Start Up, cycling 142 when temp hit 10.68
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I tried cycling the valve twice -- at about 11:30 and again around 1:00,
trying both the buttons and the dial -- but it has had no effect on
the temperatures (aside from the transient spikes). That might be
bad. We will have to see if it altered the trend.
--
Donald Arseneau |
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Thu Jun 9 06:53:40 2005, Experimentor, Other, Trip at 6:45 Today.
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Solenoid quenched at 6:45. All temperature monitors were flat until trip.
Hearing compressor stop was first warning. Lights are:
Turbine T1 overspeed, Compresor alarm, cryostat quench.
--Donald Arseneau |