[Dsg-hallc_controls] [EXTERNAL] Re: CAEN JLAB - EPICS control - 2 part

[Aaron Brown]

Good Morning Greg,

To my knowledge no, the booster is not installed in either of the mainframes that we are testing, but let me contact Brad to get confirmation.

Aaron Brown
________________________________
From: Greg Kibilko <greg at setechsales.com>
Sent: Wednesday, January 29, 2020 7:14 AM
To: Aaron Brown <ambrown at jlab.org>; dsg-hallc controls <dsg-hallc_controls at jlab.org>; a.lucchesi at caen.it <a.lucchesi at caen.it>
Cc: Gianni Di Maio <g.dimaio at caen.it>; Nicola Paoli <n.paoli at caen.it>
Subject: Re: [EXTERNAL] Re: CAEN JLAB - EPICS control - 2 part

Hi Aaron,

One quick question.  When this HV mainframe system was purchased Brad also ordered an A4532 booster power supply.  Is that booster installed in the mainframe you are testing?

Thanks,
Greg

On 1/28/2020 1:52 PM, Aaron Brown wrote:
Hello Alberto,

Another quick thought:

After speaking to Pablo, I thought it may be helpful to mention that the issue with random parameter changes while using EPICS has not been observed when only one board is populated in the crate. Previously when we have seen these parameter changes we have been operating with a fully populated crate, so this may be one reason you have not been able to reproduce this issue.

Just a thought.

Warm regards,
Aaron Brown
________________________________
From: Alberto Lucchesi <a.lucchesi at caen.it><mailto:a.lucchesi at caen.it>
Sent: Tuesday, January 28, 2020 12:28 PM
To: Aaron Brown <ambrown at jlab.org><mailto:ambrown at jlab.org>; dsg-hallc controls <dsg-hallc_controls at jlab.org><mailto:dsg-hallc_controls at jlab.org>
Cc: Greg Kibilko <greg at setechsales.com><mailto:greg at setechsales.com>; Gianni Di Maio <g.dimaio at caen.it><mailto:g.dimaio at caen.it>; Nicola Paoli <n.paoli at caen.it><mailto:n.paoli at caen.it>
Subject: [EXTERNAL] Re: CAEN JLAB - EPICS control - 2 part

Hi Aaron,

after my answer to your email I had a brainstorming with my colleagues of HV division concerning the issue 2.
We don't have yet an explanation of that wrong behavior and there some question we would like ask you.

1) thet load is 2 MΩ for each channel, but which is the voltage of each channel?
2) the board that, let'say, "disappear" could be one with the load attached or one without load, we need to knwo how many boards are inserted in the Sy4527 and how many of them have the load.


3) Can you verify if each of the boards (with the load) on the setup that shows the issue have the pins in the right position? One of our hypotesis is that if the pins ( male and female) are not well plugged, it is possible that a bad contact could induce discharges that power off that board or one next to that..

Best Regards,
Alberto



--
Greg Kibilko
SETS - SE Technical Sales, Inc.
112 Tyra Lane
Townville, SC 29689
P: (864) 356-2606
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