[Dsg-halla_ecal] ECal test stand

[Donald Jones]

Hi Marc,
Jimmy and I adjusted the settings higher. Everything seems to be behaving as expected. We need to get data on the fully heated system ASAP so that we can place an order for heaters and power supplies this fiscal year (as in this week). As we discussed this morning, since the system is new and may not behave exactly as we expect, we will need to monitor it more closely.  After watching it today, I realized it will not reach temperatures we need during our regular 8 to 10 hour workday, so Jimmy and I agreed to run the system overnight by alternating coming in to check on it every few hours throughout the evening and night. We can tweak setpoints as necessary or even shut it down if there is an issue. We carefully monitored each  material used in the enclosure for temperature rating and have already run the heaters and enclosure to much hotter temperatures than what we are aiming for here, so I am not worried about unexpected material flammability. However, we haven't used this control+power supply sufficiently, so we will need to come in physically to make sure everything is behaving as expected. Checking every few hours should be sufficient to catch an unexpected runaway effect. We should physically check the power supplies to make sure they aren't overheating and that the system as a whole is behaving safely and meeting expectations. If there is a way for us to monitor it remotely like you do, that would be handy too.
-Don

Donald Jones
Hall A/C Staff Scientist
Jefferson Lab
Newport News, VA
________________________________
From: Dsg-halla_ecal <dsg-halla_ecal-bounces at jlab.org> on behalf of Marc Mcmullen via Dsg-halla_ecal <dsg-halla_ecal at jlab.org>
Sent: Monday, August 14, 2023 1:54 PM
To: dsg-halla_ecal at jlab.org <dsg-halla_ecal at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>
Subject: Re: [Dsg-halla_ecal] ECal test stand

Hi Don,

I have a meeting to attend, but here is a plot of the current temperatures if you wanted to make an adjustment at the test stand.

Marc
________________________________
From: Dsg-halla_ecal <dsg-halla_ecal-bounces at jlab.org> on behalf of Marc Mcmullen via Dsg-halla_ecal <dsg-halla_ecal at jlab.org>
Sent: Monday, August 14, 2023 10:08 AM
To: dsg-halla_ecal at jlab.org <dsg-halla_ecal at jlab.org>
Subject: [Dsg-halla_ecal] ECal test stand

Hi Don,

Are you available to go to the test stand this morning. If so we should test the system at operational temperatures (enough to get the crystal fronts to 220C).

I will be on vacation starting Tuesday afternoon. During my absence contact Brian Eng or Tyler Lemon if there is an issue with the controls.

During the testing phase, the system should not be run without someone monitoring it. The test station has the controls running on the local monitor.

Marc
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