[Opera-CONNIE] loss of vacuum

[Guillermo Fernandez]

yes

On Monday, January 12, 2015, Juan Estrada <estrada at fnal.gov> wrote:

> Thanks for the report Guillermo.
> The first problem notices by the monitoring was a pressure spike?
>
> On Jan 12, 2015, at 3:59 PM, Guillermo Fernandez <
> fmoroni.guillermo at gmail.com
> <javascript:_e(%7B%7D,'cvml','fmoroni.guillermo at gmail.com');>> wrote:i
>
>  Hello,
>
> it seems we have had another shutdown of the system, but this time due to
> a problem in the vacuum system, on Saturday 10th in the evening. The system
> started the warm up process of the detector because a detection of pressure
> above the safe limit. The pump indicates Error 006 which correspond to
>
>  <PastedGraphic-1.png>
>
>
> The pump started sending this error at 22:20:56 GMT on 1/10/15. Few
> minutes before the system started in shutdown.
>
> The rough pump is still running, but not the turbo pump. However, the
> vacuum at the moment is 9.34 mbars, much higher than expected only with the
> rough pump.
> It is attached a report of the more important variables (and a zoom of the
> last our). Together with the loss of vacuum, there was a very quick
> increase of the temperature of the different parts of the pump and an
> abrupt decrease of the turbo pump rpm. Also the "temperature motor" was the
> variable with the largest excursion. These signals might indicate we had
> some leak in the system. It would be very interesting to hear the opinion
> of someone with more experience with vacuum pumps.
>
> I know there are people going to the nuclear plant tomorrow. What time are
> you planning to be there and for how long?
> We may use the man power there to corroborate the detector status and
> start making some vacuum tests. Can you share the phone number of at least
> two more people going there tomorrow? just in case we have some problems
> with the experiment's phone.
>
> The solution of this problem might not be simple. Even some simple tests
> on the vacuum system might take some time, taking into account they should
> be done carefully and with guidance from abroad.
>
> Regards,
>
> Guillermo
>
>
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>
> <report.pdf>
>
> <report.pdf>
>
>
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