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Po-210 Sample
Alpha decay seen from a Po-210 needle sample.
The System
The white towel above the black cold plate is soaked in 90% IPA. A 10 kV grid (not visible) is energized above the cold plate.
How Cold?
Cold plate temperature readings.
Solid-state Cooling
6 Stacks of Peltier Coolers used to bring the cold plate down to -29 C. The thermal interfacing material is already mounted in this image, hiding the gaps between each stack.
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