[Dsg-halla_ecal] heating system

[Donald Jones]

Hi Marc,
The heater prototype worked remarkably well. Now that the ALL experiment has been cancelled and we will not be gettin more beam, I am hearing that to satisfy the ERR committee we will need to keep the prototype intact until the Spring run to demonstrate operation during beam with sufficient dose that the control crystals show darkening while the heated ones remain clear. For now, though, is there any reason from your standpoint not to cool it off? I have one more thing to look at first, but just wanted to check with you.
-Don

Donald Jones
Hall A/C Staff Scientist
Jefferson Lab
Newport News, VA
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