Abstract
We have been interested in developing source-experiment-detector type quasiparticle beam experiments in superfluid 3He for some time. Recently we have developed a new source and detector based on the quasiparticle equivalent of the blackbody radiator. We have already used these devices for a few simple experiments but many more are possible, for example the direct observation of quasiparticle transmission across an A-B interface. The radiators are so sensitive that we can easily see the heat leak entering the liquid from the epoxy walls and also note that the leak from copper walls is more than 100 times smaller than from the epoxy.
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