A compact and highly collimated atomic/molecular beam source
Abstract
We describe the design, characterization and application of a simple, highly collimated and compact atomic/molecular beam source. This source is based on a segmented capillary design, constructed using a syringe needle. Angular width measurements and free molecular flow simulations show that the segmented structure effectively suppresses atoms travelling in off-axis directions, resulting in a narrow beam of Helium atoms having a width of 7 mrad (full width half maximum). We demonstrate an application of this source by using it for monitoring real-time changes in surface coverage on a clean Cu(110) surface exposed to oxygen, by measuring specular reflectivity of the Helium beam generated using this source.
Cite
@article{arxiv.2301.13407,
title = {A compact and highly collimated atomic/molecular beam source},
author = {Geetika Bhardwaj and Saurabh Kumar Singh and Pranav R. Shirhatti},
journal= {arXiv preprint arXiv:2301.13407},
year = {2023}
}
Comments
7 pages, 5 figures, supplementary information (1 figure)