LASER COOLING OF A SMALL NUMBER OF BE+ IONS IN A PENNING TRAP

被引：6

作者：

IMAJO, H ^{[1
]}

URABE, S ^{[1
]}

HAYASAKA, K ^{[1
]}

WATANABE, M ^{[1
]}

HAYASHI, R ^{[1
]}

机构：

[1] KAGOSHIMA UNIV,FAC ENGN,KAGOSHIMA 890,JAPAN

来源：

APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY | 1993年 / 57卷 / 02期

关键词：

D O I：

10.1007/BF00425998

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Be+ ions stored in a Penning trap were cooled by a laser beam perpendicular to the magnetic field. The cooled ions are strongly coupled and phase transitions of up to 100 ions were observed. In experiments with only a few ions stored in the trap, a stepwise decrease in fluorescence intensity was observed. All steps are of the same size and so every step is attributed to a single ion. The discrete changes in fluorescence occurred more frequently when the background pressure was increased, caused by collisions between stored ions and background neutral molecules.

引用

收藏

页码：141 / 144

页数：4

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