[Dsg-hallb_magnets] lcw 92 flow rates

[Amrit Yegneswaran]

thanks brian. 
w.r.t. to this statement: 
We don't really care so much about the flow rate through the makeup itself, but rather if it is on or not. 
i guess this has to be within certain limits, not one H2O molecule/year!!) 
yeah, and regarding those two questions which are still hanging in the ether, what's your guess? 
or do we believe in the ostrich solution? 


From: "Brian Eng" <beng at jlab.org> 
To: "Amrit Yegneswaran" <yeg at jlab.org> 
Cc: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org> 
Sent: Thursday, November 15, 2018 9:49:03 AM 
Subject: Re: [Dsg-hallb_magnets] lcw 92 flow rates 

Without the addition of a separate flow meter to measure the flow through the entire MPS I think all we have is the individual values measured earlier. 

https://logbooks.jlab.org/entry/3625102 

There's a copy of the files on the O: drive here O:\DSG\DETECTORS\magnets pablo\Hall B\HB_TORSOL_Waterflow 

We don't really care so much about the flow rate through the makeup itself, but rather if it is on or not. 


I think there's two outstanding issues (maybe someone else has others?) 
1) Why does this only seem to effect the solenoid and not the torus? 
2) Does the solenoid need the same flow thresholds since it runs at ~2400 A instead of the 4000 A the recommended flow numbers are for? 

Doing something about 2 would cover up any problems with 1 so maybe it shouldn't be done right away, OTOH it would most likely prevent the fast dumps from happening. 

----- Original Message ----- 
> From: "Amrit Yegneswaran" <yeg at jlab.org> 
> To: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org> 
> Sent: Thursday, November 15, 2018 9:22:05 AM 
> Subject: [Dsg-hallb_magnets] lcw 92 flow rates 

> hello, 
> as i've the day off i'm updating notes/calculating for personal pleasure! 
> 
> 
> 1. does any one know the "true" lcw flow rate through the solenoid MPS? 
> 2. are these the last numbers posted? 
> 3. if so, are the flow rate errors negligible, that we don't quote them. 
> 4. is there a way to calibrate lcw92? 
> 
> any volunteers? 
> ok, thanks brian, for volunteering. 
> amrit 
> 
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