毫米尺度和百万秒差距尺度上密度涨落的比较研究
A comparative study of density fluctuations on mm and Mpc scales
摘要：
我们在早期的工作中（Basse NP 2005，Phys.Lett. A vol.340 p.456）报道了在小（mm）和大（Mpc）尺度上密度波动功率与波数之间有趣的相似性。在本文中，我们扩大了我们以前的研究小规模和大规模的测量融合等离子体和使用宇宙学数据，分别。的测量结果进行比较，从经典的流体湍流理论的预测。小尺度和大尺度数据都可以拟合成与湍流耗散范围一致的函数形式。在聚变等离子体和宇宙学中，密度涨落功率对波数的依赖性可能表明这些涨落的共同起源。
英文摘要：
We have in earlier work (Basse N P 2005, Phys. Lett. A vol. 340 p. 456) reported on intriguing similarities between density fluctuation power versus wavenumber on small (mm) and large (Mpc) scales. In this paper we expand upon our previous studies of small and large scale measurements made in fusion plasmas and using cosmological data, respectively. The measurements are compared to predictions from classical fluid turbulence theory. Both small and large scale data can be fitted to a functional form that is consistent with the dissipation range of turbulence. The comparable dependency of density fluctuation power on wavenumber in fusion plasmas and cosmology might indicate a common origin of these fluctuations.
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