[Dsg-hallb_magnets] Solenoid Meeting minutes

[Ruben Fair]

Pablo, 

This question should be directed to Dave Kashy. 

Ruben 



From: "Pablo Campero Rojas" <campero at jlab.org> 
To: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org> 
Cc: "John Hogan" <hogan at jlab.org> 
Sent: Wednesday, May 17, 2017 11:52:37 AM 
Subject: Re: [Dsg-hallb_magnets] Solenoid Meeting minutes 


Ruben and Renuka, 

Based on the operational cryogenic parameter shown by Jhon. Are you agreed to take as a 'Controlled Ramp (PLC)' threshold (for PT8670) ~ 0.98 [atm] for the Solenoid Magnet interlocks? 

Do we want to have a 'Fast Dump (PLC)' event for this pressure signal? If this is the case, what should be this threshold value? 

Best Regards, 
Pablo 

From: "Ruben Fair" <rfair at jlab.org> 
To: "Pablo Campero Rojas" <campero at jlab.org> 
Sent: Wednesday, May 17, 2017 11:07:55 AM 
Subject: Fwd: [Dsg-hallb_magnets] Solenoid Meeting minutes 


FYI 

From: "John Hogan" <hogan at jlab.org> 
To: "David Kashy" <kashy at jlab.org> 
Cc: "Probir Ghoshal" <ghoshal at jlab.org>, "Ruben Fair" <rfair at jlab.org>, "Joseph Matalevich" <josephm at jlab.org>, "Glenn Young" <gyoung at jlab.org>, "Renuka Rajput-Ghoshal" <renuka at jlab.org> 
Sent: Wednesday, May 17, 2017 10:57:18 AM 
Subject: Re: [Dsg-hallb_magnets] Solenoid Meeting minutes 

Dave, 

The cryogenic operational (pressure) parameter provided by ETI is not to exceed 2.2 Bar (design is 3.2 Bar). As long as the control system is designed below this limit, the operation of the solenoid will be within the ETI design parameters. 

Please let me know if you need anything else. 

Thanks, 
John 



----- On May 17, 2017, at 10:17 AM, kashy <kashy at jlab.org> wrote: 



Hi Guys 
RV8670 set value is 1.5/2.0 ATM depending if guard vacuum is on 

PT8670 effects coil temperatures but also may effect shield flow and thus coil temperatures (in the opposite direction) 

I see from the meeting minutes that I'm to provide interlock set points for controlled and fast dump 

I'd say that we should expect to see the warm return pressure range from 1.07 to1.3. 

Depending on how the shield works then PT8670 will be somewhat higher 



If the guard vac is off we probably do not want to power it at all 

If GV is on we have some headroom but how much is not clear 

Can ETI provide the interlock thresholds 

Dave 

Begin forwarded message: 


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From: Pablo Campero < campero at jlab.org > 
Date: May 16, 2017 at 5:12:02 PM EDT 
To: dsg-hallb magnets < dsg-hallb_magnets at jlab.org > 
Subject: [Dsg-hallb_magnets] Solenoid Meeting minutes 





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Hello, 
Attached find the meeting minutes that we held on 5/16/17 to discuss about the Solenoid Interlock spreadsheet and Solenoid Interlock Status EPICS screen. 

Best Regards, 
Pablo 


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