[Dsg-halla_ecal] ECal test stand

[shahinya at jlab.org]

Hi Donald,

Please send me table where I can see
1. Temperature in flange.
2. Temperature in back of the lead glass
3. Temperature in light guide
4. Voltage in the heater and cartridge

Thank you,
Albert

> 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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