Enhanced Loading of 40K from Natural Abundance Potassium Source with a High Performance 2D+ MOT

• 来源期刊: 中国物理快报（英文版）
• 关键词: @@
• 年，卷（期）: 2018,（3）
• 页码范围: 22-24
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/0256-307X/35/3/033701

摘要

40K is one of the most important atomic species for ultra-cold atomic physics.Due to the extremely low concentration (0.012％) of 40K in natural abundance of potassium,most experiments use 4 10％ enriched potassium source,which have greatly suffered from the extremely low annual production and significant price hikes in recent years.Using naturally abundant potassium source,we capture 5.4 × 106 cold 40K atoms with the help of a high performance of two-dimensional magneto-optical trap (2D+ MOT),which is almost three orders of magnitude greater than previous results without the 2D+ MOT.The number of the 40K atoms is sufficient for most ultra-cold 40K experiments,and our approach provides an ideal alternative for the field.