脉冲光束凝结状态下氦液滴的尺寸分布

IF 0.6 4区物理与天体物理 Q4 PHYSICS, APPLIED

Low Temperature Physics Pub Date : 2024-09-04 DOI:10.1063/10.0028187

A. Iguchi, A. Hirota, S. Menk, T. Yamaguchi, H. Tanuma, J. R. Harries, S. Kuma, T. Azuma

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引用次数: 0

摘要

我们测定了脉冲光束从气相冷凝状态下产生的氦液滴的大小分布。在电子撞击电离之后，我们使用静电圆柱偏转装置测量了带正电的液滴的动能和速度，从而确定了它们的质量电荷比。在一系列不同的源条件下，我们观察到了双峰速度分布和对数正态尺寸分布。我们的结果与连续光束的结果类似，但平均尺寸要大 100 倍左右。这里报告的对数正态尺寸分布与最近报告的使用不同喷嘴设计产生的脉冲光束的指数分布有很大不同。

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Size distribution of helium droplets in the condensation regime of a pulsed beam

We determined the size distribution of helium droplets produced in a pulsed beam in the condensation regime from the gas phase. Following electron-impact ionization, the mass-to-charge ratios of the positively charged droplets were determined by measuring their kinetic energies and velocities using an electrostatic cylindrical deflector setup. Over a range of different source conditions, we observed bimodal velocity distributions and log-normal size distributions. Our results are similar to those reported for continuous beams, but with mean sizes larger by a factor of around 100. The log-normal size distributions reported here differ strongly from the exponential distributions recently reported for a pulsed beam produced using a different nozzle design.

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来源期刊

Low Temperature Physics 物理-物理：应用

CiteScore

1.20

自引率

25.00%

发文量

138

审稿时长

3 months

期刊介绍： Guided by an international editorial board, Low Temperature Physics (LTP) communicates the results of important experimental and theoretical studies conducted at low temperatures. LTP offers key work in such areas as superconductivity, magnetism, lattice dynamics, quantum liquids and crystals, cryocrystals, low-dimensional and disordered systems, electronic properties of normal metals and alloys, and critical phenomena. The journal publishes original articles on new experimental and theoretical results as well as review articles, brief communications, memoirs, and biographies. Low Temperature Physics, a translation of the copyrighted Journal FIZIKA NIZKIKH TEMPERATUR, is a monthly journal containing English reports of current research in the field of the low temperature physics. The translation began with the 1975 issues. One volume is published annually beginning with the January issues.