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[videbaek <videbaek AT bnl.gov>]

Hi

As I said Monday I have yet to see an explanation that stops the flow in 
the first part of a cooling loop and that the last part has sufficient 
cooling - this would require back flow.
I wonder more if something electronics went wrong with the temp readout, 
and could it have affected the output levels though unlikely.

-F




On 2021-11-16 17:04, Xu Sun wrote:
> Hi Elke,
>
> The module 3-11 is the first module in that cooling line.
> And the cooling supply will go to the outer section first then the
> inner section of the module 3-11.
>
> I agree that the temperature issue might not be caused by the cooling
> flow, but we would still like to try one more time.
>
> Best,
>
> Xu
>
> On Tue, Nov 16, 2021 at 4:53 PM Aschenauer Elke-Caroline
> <elke AT bnl.gov> wrote:
>
> > Dear Xu,
> >
> > let me ask a question today at the meeting I asked you is it the
> > module the first or the last one in the cooling chain and you
> > answered the first one.
> > So if really the cooling is causing the temperature issue. Maybe I
> > misunderstood your answer today, sorry.
> > I’m not against increasing the flow, but I’m just wondering.
> >
> > Cheers elke
> >
> > > On Nov 16, 2021, at 16:49, Xu Sun <sunxuhit AT gmail.com> wrote:
> > >
> > > Hi All,
> > >
> > > We are planning to increase the cooling flow speed by changing the
> > > pump setting from 1100 RPM to 1500 RPM tomorrow.
> > > This change will increase the flow rate by 20-30% and the pressure
> > > is still well below the limit of the soft tube.
> > > Christian will help us to do this.
> > >
> > > The flow speed will be changed back to 1100 RPM after we finish
> > > the test, since the current value is sufficient enough to cool
> > > down the whole FST.
> > > Hopefully this can fix the temperature issue.
> > >
> > > We will keep you posted.
> > >
> > > Best,
> > >
> > > Xu _______________________________________________
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--
Flemming Videbaek
senior scientist
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
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