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

[campero at jlab.org]

Comments:
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 - by campero on Fri, 11/02/2018 - 07:10.

Based on the FastDAQ data - 
Based on the FastDAQ data archived, VT15 is the only one that had a voltage spike prior to the dump ~ 180 ms before the rest of the VTs. Although VT15 voltage spike seems suspicious since the analysis for the root file (solenoid_20181102_033750.root) that contains the data prior to the dump indicates  ~1.58% duplicates and 3.87% overlaps. Looks like something not getting shifted correctly.

Attached find voltage taps plosts and QDs channels prior and right at trip time; option -JSD appliaded for all plots.


 - by sandoval on Fri, 11/02/2018 - 06:15.

MPS Status First Bits: - MPS Status First Bits:

Polarity Normal
%
Sum Interlock
Preregulator Fail
WaterFlow
SPARE
(as written in system 8500 manual, not necessarily same)

Later:
DC Overload
MPS Over Temperature



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Logentry Text:
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Solenoid fast dump at 2416  A.  
PLC SOE timestamps indicates that first trip was due to the MPS Dump_Contact at 03:56:51.016871. Followed by MPS Main-contact and QD1.
New Solenoid SOE EPICS GUI screen matches with the PLC controlle SOE see attched screenshots. 
Based in this new data (timestamps for Main_contact and MPS Dump_Contact recently added), this is the first time that we can prove that Main Contact in the Solenoid MPS tripped before the QDs. 
Further investigations in progress.


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