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Observation of thermomechanical equilibration in the presence of a solid ~4He conduit

机译:在固体〜4He管道中观察热机械平衡

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摘要

We observe a thermomechanical effect when a chemical-potential difference is created by a temperature difference imposed between two liquid reservoirs connected to each other through Vycor rods in series with solid hep ~4He. By creating a temperature difference, AT, between the two reservoirs, we induce a rate-limited growth of a pressure difference between the two reservoirs, AP. In equilibrium AP vs AT is in quantitative agreement with the thermomechanical effect in superfluid helium. These observations confirm that below ~600 mK a flux-limited flow exists through the solid helium.
机译:当通过在与固体Hep〜4He串联的Vycor棒相互连接的两个储液罐之间施加温差而产生化学势差时,我们观察到热机械效应。通过在两个储层之间创建温度差AT,我们可以诱导两个储层AP之间的压力差以速率限制的方式增长。在平衡状态下,AP vs AT与超流体氦中的热机械效应在数量上一致。这些观察结果证实,在〜600 mK以下,存在通过固体氦气的通量限制流。

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