Magnetic resonance imaging of convection in laser-polarized xenon

被引：22

作者：

Mair, RW

Tseng, CH

Wong, GP

Cory, DG

Walsworth, RL

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] MIT, Dept Nucl Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW E | 2000年 / 61卷 / 03期

关键词：

D O I：

10.1103/PhysRevE.61.2741

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We demonstrate nuclear magnetic resonance (NMR) imaging of the flow and diffusion of laser-polarized xenon (Xe-129) gas undergoing convection above evaporating laser-polarized liquid xenon. The large xenon NMR signal provided by the laser-polarization technique allows more rapid imaging than one can achieve with thermally polarized gas-liquid systems, permitting shorter time-scale events such as rapid gas flow and gas-liquid dynamics to be observed. Two-dimensional velocity-encoded imaging shows convective gas flow above the evaporating liquid xenon, and also permits the measurement of enhanced gas diffusion near regions of large velocity variation.

引用

页码：2741 / 2748

页数：8

共 25 条

[1] VELOCITY AND CONCENTRATION MEASUREMENTS OF SUSPENSIONS BY NUCLEAR-MAGNETIC-RESONANCE IMAGING [J].