[Dsg-halla_ecal] ECal test stand

Mon Aug 14 23:52:25 EDT 2023

Don,

I am sorry, it seems there was a communication problem.  I have  been informed that the Division Safety Officer wants to do the last check.

patrizia
-------------------------------------------
# Patrizia Rossi
# Jefferson Lab
# 12000 Jefferson Avenue
# Suite 5
# Newport News VA 23606 (USA)
# e-mail: rossi at jlab.org<mailto:rossi at jlab.org>
# phone: +1 (757) 269 7740
# fax: + 1 (757) 269 5800

From: Donald Jones <jonesdc at jlab.org>
Date: Monday, August 14, 2023 at 11:38 PM
To: Patrizia Rossi <rossi at jlab.org>, dsg-halla_ecal at jlab.org <dsg-halla_ecal at jlab.org>, Marc Mcmullen <mcmullen at jlab.org>, Ed Folts <folts at jlab.org>, Mark Jones <jones at jlab.org>
Subject: Re: ECal test stand
Ok. I am currently sitting in front of the test setup and it is already within a few degrees of our running temperature. I will turn if off then and go home. I will say that I am frustrated that after I went carefully through the whole process communicating with the different parties in EH&S including Ed and had an approved task list, that I am now being told that I must turn it off just when I get to the operating temperature.
-Don

Donald Jones
Hall A/C Staff Scientist
Jefferson Lab
Newport News, VA
________________________________
From: Patrizia Rossi <rossi at jlab.org>
Sent: Monday, August 14, 2023 10:45 PM
To: Donald Jones <jonesdc at jlab.org>; dsg-halla_ecal at jlab.org <dsg-halla_ecal at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>; Ed Folts <folts at jlab.org>; Mark Jones <jones at jlab.org>; Patrizia Rossi <rossi at jlab.org>
Subject: Re: ECal test stand

Hi Don,

I exchanged e-mails with Marc and Ed and even if everything seems OK, I asked Ed to see the AList updated before you start the test. This is the first thing Ed will do tomorrow morning.

Also Marc suggested that you leave the roll up door to Physics storage open and inform the guards of the testing. The test stand does smell bad, and the guards should be aware that the test is running.

Best

patrizia

-------------------------------------------

# Patrizia Rossi
# Jefferson Lab
# 12000 Jefferson Avenue
# Suite 5
# Newport News VA 23606 (USA)
# e-mail: rossi at jlab.org<mailto:rossi at jlab.org>
# phone: +1 (757) 269 7740
# fax: + 1 (757) 269 5800

From: Donald Jones <jonesdc at jlab.org>
Date: Monday, August 14, 2023 at 4:19 PM
To: Patrizia Rossi <rossi at jlab.org>, dsg-halla_ecal at jlab.org <dsg-halla_ecal at jlab.org>, Marc Mcmullen <mcmullen at jlab.org>, Ed Folts <folts at jlab.org>, Mark Jones <jones at jlab.org>
Subject: Re: ECal test stand

Hi Patricia,

The short answer is yes. This test is covered under a task list. This is the way we have been running these tests from the beginning although the task list has evolved as changes were required. We have to run the system overnight or we can't get the data we need to confirm it actually works well. When we did this months ago on a similar but 120VAC version of the system (the new system is 48VDC), we ran it without automated controls and just came in to monitor the temperatures and adjust the current manually. That worked, but it is tedious. Now that we have controls, we expect the system to behave better and to take less time to regulate to the correct temperature than our previous "manual" adjustment and so far it appears to be working very well. But since the controls haven't been fully vetted, I think we should treat it like it is a manual control and come in regularly to check on it. I understand your concern. I don't think I am being cavalier here because this appears to carry very low risk. I was planning on a check in frequency of every 3 hours. If you want to increase that I can accommodate. I suppose I could just stay all night as well if that is required, but I would like to run it non-stop for several days to get some hard data. If you request, I can also just turn it off overnight, but we will then have to decide how to proceed with making procurements without a system tested up to expected running temperatures.

Please let me know if Jimmy and I should alter our plans.

There is also an added complication that I may have to report for jury duty later this week.

-Don

Donald Jones

Hall A/C Staff Scientist

Jefferson Lab

Newport News, VA

________________________________

From: Patrizia Rossi <rossi at jlab.org>
Sent: Monday, August 14, 2023 4:02 PM
To: Donald Jones <jonesdc at jlab.org>; dsg-halla_ecal at jlab.org <dsg-halla_ecal at jlab.org>; Marc Mcmullen <mcmullen at jlab.org>; Ed Folts <folts at jlab.org>; Mark Jones <jones at jlab.org>
Subject: Re: ECal test stand

Hi Don,

Do you have the right and approved documentation in place to run the test that you are suggesting?

I am a little bit scared about your statement

“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…..”

The last thing that we need is to get into an accident because the work has not be planned as it should have been

patrizia

-------------------------------------------

# Patrizia Rossi
# Jefferson Lab
# 12000 Jefferson Avenue
# Suite 5
# Newport News VA 23606 (USA)
# e-mail: rossi at jlab.org<mailto:rossi at jlab.org>
# phone: +1 (757) 269 7740
# fax: + 1 (757) 269 5800

From: Dsg-halla_ecal <dsg-halla_ecal-bounces at jlab.org> on behalf of Donald Jones via Dsg-halla_ecal <dsg-halla_ecal at jlab.org>
Date: Monday, August 14, 2023 at 3:54 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 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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