1. David Geelan Centre for Quantum Dynamics/ Institute for Glycomics
Trapping and Characterising Charged Particles Across A Wide Range of Q/M Ratios
David Geelan
Centre for Quantum Dynamics/
Institute for Glycomics

2. Motivation
Exploring and characterising behaviour of large biomolecules (without solution or substrate) including manipulations
Extending the trap depth and range of convenience of Paul traps in terms of Q/M ratios and scales of particles (and making them cheaper and easier to fabricate)

3. History Nobel Prize for Physics, 1989 Wolfgang Paul (photo: dpa)
Hans Dehmelt
(photo: Matthew McVay/Corbis)
Nobel Prize for Physics, 1989

4. Experiment Mechanical analog for Paul trapping
(video: NatSci Videos)
Modes of a quadrupole ion trap
(image: Arian Kriesch)

5. Experiment

6. Data Computer (MATLAB) modeling of stability region for a range of
damping conditions
Experimental graph of trap stability, b≈1

7. Particles are on the order of 30 µm in diameter
Data
One trapped particle, full gravity compensation
Multiple trapped particles, no gravity compensation
Two trapped particles, partial gravity compensation
Particles are on the order of 30 µm in diameter

8. Conclusion and Future Directions
Three trapped nanodiamonds
(image: Erik Streed)
Surface ring trap design on printed circuit board
(image: Kim, Herskind, Kim, Kim & Chuang)

9. Credits and Acknowledgements
Thanks to my supervisory team: Dr Erik Streed and Professor Dave Kielpinski We acknowledge HDR research funding from the School of Biomolecular and Physical Sciences All images and video not otherwise credited: David Geelan