JQC Colloquium 2015 - Ultrabright Ions from Ultracold Atoms


July 06, 2015

Speakers: Jabez McClelland


Durham University

PH8 Rochester Building

About this event

Speaker: Jabez McClelland

(Center for Nanoscale Science and Technology, National Institute of Standards and Technology, USA)

Time: 5pm - 6pm

Free and open to public




Bright sources of charged particles represent a key enabling technology for imaging and nanoscale fabrication with the best possible spatial resolution, temporal sensitivity, and coherence. Traditionally, brightness is achieved by devising ways to get as many charged particles as possible to emit from as small a source area as possible. Sources such as the liquid metal ion source or the field emission electron source are representative of this approach. We have developed a new type of source that takes a radically different approach to attaining high brightness. Utilizing the ultracold temperatures achievable with laser cooling, our source can produce ion beams that not only have very high brightness, but also provide a wide choice of ionic species and a narrow energy spread. This source allows the creation of focused ion beams (FIBs) of new species such as alkalis and alkaline earths with nanometer resolution and picoampere currents, opening new opportunities for nanoscale imaging, material modification and ion implantation. For our first realization, we have constructed a source based on photoionization of a Li magneto-optical trap and mated this source with a conventional FIB column. I will discuss applications of this focused ion beam, both as an imaging tool and as a potential enabler of nanoscale ion transport studies. I will also discuss development of a new, higher brightness cold atom source with applications in nanomachining and integrated circuit edit.



This colloquium is part of our annual JQC Symposium. For enquiries, please contact Kean Loon Lee (keanloon.lee AT

Event poster is available here.

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