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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Thermal effects in the anomalous growth of helium crystals
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Thermal effects in the anomalous growth of helium crystals

机译：氦晶体异常生长中的热效应

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摘要

Variations in pressure and thermal response have been synchronously measured beginning from the moment of nucleation of a helium crystal, at the onset of anomalously fast growth and during this growth, and in the course of relaxation to the normal kinetics. The measurements were performed at temperatures within 0.4-0.7 K in a range of pressures from the boundary of the anomalous growth region up to an overpressure of Delta P approximate to 25 mbar. A superconductor bolometer with an rms noise of about 10 mu K was used as the fast-response thermal sensor. Temperature variations related to changes in the pressure and the heat dissipation during crystal growth were observed. The upper boundary of possible variations in the internal energy of the crystal is estimated as 1-20% of the excess energy of the system prior to the onset of anomalous growth.
机译：从氦晶体成核的时刻开始，在异常快速生长的开始以及此生长期间，以及从松弛到正常动力学的过程中，已同步测量了压力和热响应的变化。在从异常生长区域的边界到大约25 mbar的Delta P超压的压力范围内，在0.4-0.7 K的温度范围内进行测量。均方根噪声约为10μK的超导体辐射热计用作快速响应的热传感器。观察到与晶体生长过程中压力变化和散热有关的温度变化。晶体内部能量可能发生变化的上限估计为异常增长开始之前系统多余能量的1-20％。

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