[Dsg-hallb_magnets] Question regarding current fastDAQ data from Solenoid fast dump on Sept 13, 2017

[Tyler Lemon]

Hello, 

Attached is the plot that should have been attached in my previous email. 

Best regards, 
Tyler 


From: "Tyler Lemon" <tlemon at jlab.org> 
To: "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org> 
Sent: Thursday, September 14, 2017 9:21:44 AM 
Subject: [Dsg-hallb_magnets] Question regarding current fastDAQ data from Solenoid fast dump on Sept 13, 2017 

Hello, 

This morning, Pete Bonneau and I were looking at the fastDAQ data Brian and Pablo sent yesterday of the ~1 second where the fast dump happened in the Solenoid. 

We noticed that the current jumps ~15A and then decays several times at the very start of the ramp down (plot attached). 

We think that these oscillations are caused by the dump switch flipping. Is this the cause of these oscillations? If not, what is causing the current to jump like that at the start of the fast dump? 

Please let us know. 

Best regards, 
Tyler 

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