Kalpani Werellapatha

PhD Physicist, X-ray scientist, Material Scientist

Research Expertise

Condensed matter physics
Synchrotron x-ray spectroscopy
Nano science
High energy density physics
X-ray Science
Instrumentation
Information Systems

About

-I'm a physicist (BSc. in Physics and PhD in Physics), specialized in experimental condensed matter physics with \~10 years of research experience. I use x-rays generated by synchrotrons (The Advanced Photon Source) and large laser facilities (The National Ignition Facility, Laboratory for Laser Energetics) to probe the structure of solids, liquids, amorphous and nanoscale materials at ambient and extreme conditions. -I'm specialized in core shell x-ray spectroscopy methods (x-ray absorption spectroscopy (EXAFS, XANES, XMCD) and x-ray emission spectroscopy (XES)) and x-ray scattering methods (x-ray diffraction). I have helped various interdisciplinary research groups to solve the structure of their materials of interest and have developed and published experiments as a principal investigator. -I have helped develop new instrumentation to acquire data from x-ray experiments and have extensive experience with x-ray diagnostics/instrumentation. I routinely use computer programing (python, C++, SQL) and algorithms to acquire and analyze my experimental data from various x-ray and other diagnostics at synchrotrons and large laser facilities.

Publications

Metal and Ligand Effects on Bonding in Group 6 Complexes of Redox-Active Amidodiphenoxides

Inorganic Chemistry / Sep 23, 2014

Ranis, L. G., Werellapatha, K., Pietrini, N. J., Bunker, B. A., & Brown, S. N. (2014). Metal and Ligand Effects on Bonding in Group 6 Complexes of Redox-Active Amidodiphenoxides. Inorganic Chemistry, 53(19), 10203–10216. https://doi.org/10.1021/ic501222n

Timing characterization of fast hCMOS sensors

Review of Scientific Instruments / Apr 01, 2021

Benedetti, L. R., Palmer, N. E., Hurd, E. R., Durand, C. E., Carpenter, A. C., Dayton, M. S., Golick, B., Holder, J. P., Trosseille, C., Werellapatha, K., & Gorman, M. G. (2021). Timing characterization of fast hCMOS sensors. Review of Scientific Instruments, 92(4). https://doi.org/10.1063/5.0043796

Molybdenum Carbamate Nanosheets as a New Class of Potential Phase Change Materials

Nano Letters / May 22, 2017

Zhukovskyi, M., Plashnitsa, V., Petchsang, N., Ruth, A., Bajpai, A., Vietmeyer, F., Wang, Y., Brennan, M., Pang, Y., Werellapatha, K., Bunker, B., Chattopadhyay, S., Luo, T., Janko, B., Fay, P., & Kuno, M. (2017). Molybdenum Carbamate Nanosheets as a New Class of Potential Phase Change Materials. Nano Letters, 17(6), 3902–3906. https://doi.org/10.1021/acs.nanolett.7b01464

Long duration x-ray source development for x-ray diffraction at the National Ignition Facility

Review of Scientific Instruments / May 01, 2021

Werellapatha, K., Hall, G. N., Coppari, F., Kemp, G. E., Palmer, N. E., Krauland, C., Khan, S. F., Lazicki, A., Gorman, M. G., Nagel, S. R., Heinbockel, C., Bhandarkar, N., Masters, N., Bradley, D. K., Eggert, J. H., & Benedetti, L. R. (2021). Long duration x-ray source development for x-ray diffraction at the National Ignition Facility. Review of Scientific Instruments, 92(5). https://doi.org/10.1063/5.0043677

Nanoparticle Size Effects on Cadmium Uptake on Hematite: Revisiting the Sorption Edge Approach

Environmental Engineering Science / Aug 01, 2019

Werellapatha, K., Kuhn, K. M., Bunker, B. A., & Maurice, P. A. (2019). Nanoparticle Size Effects on Cadmium Uptake on Hematite: Revisiting the Sorption Edge Approach. Environmental Engineering Science, 36(8), 883–891. https://doi.org/10.1089/ees.2019.0105

Evolution of electronic and magnetic properties of nominal magnetite nanoparticles at high pressure probed by x-ray absorption and emission techniques

Journal of Physics: Condensed Matter / Apr 08, 2019

Werellapatha, K., Escanhoela, C. A., Fabbris, G., Haskel, D., Ankudinov, A., & Chow, P. (2019). Evolution of electronic and magnetic properties of nominal magnetite nanoparticles at high pressure probed by x-ray absorption and emission techniques. Journal of Physics: Condensed Matter, 31(25), 255301. https://doi.org/10.1088/1361-648x/ab111d

Long-Duration X-Ray Source Development for X-Ray Diffraction at The National Ignition Facility

2021 IEEE International Conference on Plasma Science (ICOPS) / Sep 12, 2021

Werellapatha, K., Hall, G. N., Coppari, F., Kemp, G. E., Krygier, A., Palmer, N. E., Krauland, C., Khan, S. F., Lazicki, A., Gorman, M. G., Nagel, S. R., Heinbockel, C., Bhandarkar, N., Masters, N., Bradley, D. K., Eggert, J. H., & Benedetti, L. R. (2021, September 12). Long-Duration X-Ray Source Development for X-Ray Diffraction at The National Ignition Facility. 2021 IEEE International Conference on Plasma Science (ICOPS). https://doi.org/10.1109/icops36761.2021.9588386

Optimized x-ray emission from 10 ns long germanium x-ray sources at the National Ignition Facility

Review of Scientific Instruments / Dec 01, 2022

Werellapatha, K., Hall, G. N., Krauland, C., Krygier, A., Bhandarkar, N., Bradley, D. K., Coppari, F., Gorman, M. G., Heinbockel, C., Kemp, G. E., Khan, S. F., Lazicki, A., Masters, N., May, M. J., Nagel, S. R., Palmer, N. E., Eggert, J. H., & Benedetti, L. R. (2022). Optimized x-ray emission from 10 ns long germanium x-ray sources at the National Ignition Facility. Review of Scientific Instruments, 93(12). https://doi.org/10.1063/5.0106696

Use of XAS for Studies of Aqueous and Surface Geochemistry

Encyclopedia of Water / Dec 29, 2019

Werellapatha, K. (2019, December 29). Use of <scp>XAS</scp> for Studies of Aqueous and Surface Geochemistry. Encyclopedia of Water; Wiley; Portico. https://doi.org/10.1002/9781119300762.wsts0171

Education

University of Notre Dame

PhD in experimental condensed matter and materials physics, Physics / April, 2016

Notre Dame, Indiana, United States of America

Experience

University of California, San Diego

January, 2023Present

Lawrence Livermore National Laboratory

November, 2019November, 2022

University of Notre Dame

Links & Social Media

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