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Trapping and Characterising Charged Particles Across A Wide Range of Q/M Ratios

Trapping and Characterising Charged Particles Across A Wide Range of Q/M Ratios. David Geelan Centre for Quantum Dynamics/ Institute for Glycomics. Motivation. Exploring and characterising behaviour of large biomolecules ( without solution or substrate) including manipulations

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Trapping and Characterising Charged Particles Across A Wide Range of Q/M Ratios

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  1. 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 characterisingbehaviour 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 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. 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 Streedand 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

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