[Hallb-engineering] [Esr-users] [Revised Logentry] Follow-up Re: Controlled Ramp on VCL Flow

Steve Lassiter lassiter at jlab.org
Mon Jan 22 09:18:54 EST 2018

Hello Dave, 
The Hall C HMS magnets all tripped off around the time of the Hall A trip due to VCL flow interlocks. 
I don't see where a magnet started to warm up. Could you ID the magnet in question for us? 


----- Original Message -----

From: kashy at jlab.org 
To: devita at jlab.org, sandoval at jlab.org, hallb-engineering at jlab.org, esr-users at jlab.org 
Sent: Monday, January 22, 2018 6:55:03 AM 
Subject: [Esr-users] [Revised Logentry] Follow-up Re: Controlled Ramp on VCL Flow 

Follow-up Re: Controlled Ramp on VCL Flow 

Lognumber 3518798 . Submitted by kashy on Mon, 01/22/2018 - 00:13. 
Last updated on Mon, 01/22/2018 - 06:50 Logbooks: 	HALOG HBLOG HBSOLENOID HCLOG CLOG 
Entry Makers: 	kashy 
References: 	3518790 - Controlled Ramp on VCL Flow 

There were two events that effected our solenoid. 
1) the Hall A Q2 tripped and ramped down at 22:53 
This caused a large flow increase in the warm return line and thus temporary pressure increase. 
The solenoid lead flow bumped but it recovered. 
2) The Hall C magnet started to warm 
It looked like it went down first then went up. This may or may not have effected the Solenoid. 
At present all looks OK to continue the run 

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