[Dsg-hallb_magnets] [New Comment] Solenoid fast dump at 2416 A

[Nick Sandoval]

The timing of this fast dump does not seem right.   The post shows the SOE relay opened ~100mS after voltage tap and IDCCT movement.  Not the 280mS before movement shown from 100A tests(plc fast SOE), or the ~110mS before movement as seen from (8/30 dump, QD2 relay).  

We either have a timing shift or something caused this dump that was not captured by the SOE.  Are all other taps quiet before the dump as well?    


----- Original Message -----
From: "Pablo Campero Rojas" <campero at jlab.org>
To: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>, "Pablo Campero Rojas" <campero at jlab.org>
Sent: Saturday, September 29, 2018 2:40:02 PM
Subject: [Dsg-hallb_magnets] [New Comment] Solenoid fast dump at 2416 A

Solenoid fast dump at 2416 A 


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Lognumber 3600579 . Submitted by campero on Sat, 09/29/2018 - 11:53 . 
There is 1 comment... 
Solenoid Fast DAQ data 
new 

by campero on Sat, 09/29/2018 - 14:36 


It seems like QD#1 channel 1 upper went first after it exceded its threshold of 200 [mV]. 
Attached is the screenshot of the FastDAQ data - voltage signals on the QD#1 channel 1-4 before Solenoid tripped at 2416 A. 
-J(Removing Jitter) - S (Forcing sync) -D (duplicate timestamp correction) option used to get FastDAQ plots. 
No changes made for the Solenoid control systems during this trip. As requested by Probir PLC, QDs and MPS were reseted to enable the next Solenoid ramp up. 
Cryogenics auto recovering seems to be stable, at this time (2:36 PM) the T average for coils ~ 6.28 K and Magenet reservoir its being fill with helium LL8670 ~ 21%. 
Logbooks: 	HBSOLENOID 
Entry Makers: 	campero, rfair, ghoshal 


Solenoid fast dump at 2416 A at 08:56:55 , the SOE PLC timestamps shows that it was initiated by QD#1. 
Attached find PLC sequence of events and timestamps. 

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