Hi, please call me Lia! Welcome to my personal website. I am currently an EPSRC Doctoral Fellow at University College London where I also run the Women in Physics Group.

Ion Trapping Glass Microspheres

ion trap.jpg

Our masters student Manish alongside post-doc James Millen have built a quadrupole ion-trap which uses alternating electric fields to produce a potential well (like a deep valley) that traps charged particles. 
It really is a beautiful design but very small and delicate. 

High voltages (>1000 V) are needed but we can now trap 10 micron diameter silica spheres!

Here is a video we recorded where we overload the ion trap with loads of glass microspheres. Because their charged surfaces repel one another, they form this semi-stable trace of the trapping field potential (like magnetic lines around a magnet!). 

experimentYing Lia Li