Chammika N. B. UDALAGAMA
PhD, National University of Singapore (2006)
Senior Lecturer

Email: chammika@nus.edu.sg
Office: S7-01-03
Tel: +65 6601 1684

Current Research

  • Monte Carlo simulations of MeV ion penetration/ energy deposition into matter
  • Data acquisition (DAQ) and control systems for analysis and lithography using MeV ion beams.

The image is of an event-by-event Monte Carlo simulation of MeV protons (i.e with millions of electron-volts of energy) plunging into a material. The protons lead to secondary electron (delta-ray) cascades (seen as fiery streaks) that are the predominant mode of energy deposition.

Selected Publications

  • F. Watt, Chen Xiao, Armin Baysic De Vera, Chammika Udalagama, Ren Minqin, J. A. van Kan, and A. A. Bettiol. The singapore high resolution single cell imaging facility. Nucl. Inst. and Meth. B, 269:2168{2174, 2011.
  • Chen Xiao, Chammika Udalagama, Chen Ce-Belle, A. A. Bettiol, Danial Pickard, T. Venkatesan, and F. Watt. Whole cell imaging using fast and slow helium ions. Biophysical Journal, 101:1788{1793, 2011.
  • Chammika Udalagama, E. J. Teo, S. F. Chan, V. S. Kumar, and A. A. Bettiol. Proton beam writing of long, arbitrary structures for micro/nano photonics and uidics applications. Nucl. Inst. and Meth. B, 269:2417{2421, 2011.
  • C. Udalagama, A. A. Bettiol, and F. Watt. Imaging using pulses: a simple and fast (>100 khz) solution. Journal of Microscopy,, 238:185{188, 2010.
  • C. Udalagama, A. A. Bettiol, and F. Watt. Stochastic spatial energy deposition pro les for mev protons and kev electrons. Physical Review B (Condensed Matter and Materials Physics), 80:224107, 2009.
  • A. A. Bettiol, S.Y. Chiam, E.J. Teo, C. Udalagama, S.F. Chan, S.K. Hoi, J.A. van Kan, M.B.H. Breese, and F. Watt. Advanced applications in microphotonics using proton beam writing. Nucl. Inst. and Meth. B, 267(12-13):2280 { 2284, 2009.
  • A.A. Bettiol, C. Udalagama, and F. Watt. A new data acquisition and imaging system for nuclear microscopy based on a eld programmable gate array card. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 267(12-13):2069 { 2072, 2009. Proceedings of the 11th International Conference on Nuclear Microprobe Technology and Applications and the 3rd International Workshop on Proton Beam Writing.
  • S. K. Hoi, C. Udalagama, C. H. Sow, F. Watt, and A. Bettiol. Micro uidic sorting system based on optical force switching. Applied Physics B: Lasers and Optics, 97(4):859{865, 12 2009.