注意：采用刀刃式撇取法以通过偏转器改善分子种类的分离。

Note: Knife edge skimming for improved separation of molecular species by the deflector.

作者信息

Trippel Sebastian, Johny Melby, Kierspel Thomas, Onvlee Jolijn, Bieker Helen, Ye Hong, Mullins Terry, Gumprecht Lars, Długołęcki Karol, Küpper Jochen

机构信息

Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany.

出版信息

Rev Sci Instrum. 2018 Sep;89(9):096110. doi: 10.1063/1.5026145.

DOI:10.1063/1.5026145

PMID:30278707

Abstract

A knife edge for shaping a molecular beam is described to improve the spatial separation of the species in a molecular beam by the electrostatic deflector. The spatial separation of different molecular species from each other as well as from atomic seed gas is improved. The column density of the selected molecular-beam part in the interaction zone, which corresponds to higher signal rates, was enhanced by a factor of 1.5, limited by the virtual source size of the molecular beam.

摘要

描述了一种用于塑造分子束的刀口，以通过静电偏转器改善分子束中不同物种的空间分离。不同分子物种之间以及与原子种子气体之间的空间分离得到了改善。在相互作用区域中，对应于更高信号速率的所选分子束部分的柱密度提高了1.5倍，这受到分子束虚拟源尺寸的限制。