1. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in 1st CFEL Symposium 2011 (CFEL, Sylt, Germany, March 18-20, 2011) [poster].
2. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in The 17th International Conference on Atomic Processes in Plasmas (Queen's University, Belfast, United Kingdom, July 19-22, 2011) [poster].
3. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in The 3rd CQSE International Workshop on Atomic, Molecular, and Ultrafast Science and Technology (National Taiwan University, Taipei, Taiwan, January 7-8, 2012) [poster].
4. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in Photoions, Photoionization and Photodetachment (Gordon Research Conference, Galveston, Texas, US, February 12-17, 2012) [poster].
5. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in 3rd CFEL Symposium 2013 (CFEL, Timmendorfer Strand, Germany, October 1-3, 2013) [poster].
6. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in The Hamburg Centre for Ultrafast Imaging International Symposium 2013 (CUI, Hamburg, Germany, November 13-15, 2013) [poster].
7. Sang-Kil Son, Robert Thiele, Zoltan Jurek, Beata Ziaja, and Robin Santra, “Quantum-mechanical calculation of ionization-potential lowering in dense plasmas” in European XFEL and DESY Photon Science Users' Meeting (DESY, Hamburg, Germany, January 29-31, 2014) [poster].
8. Sang-Kil Son, Lorenzo Galli, Henry N. Chapman, and Robin Santra, “High-intensity phasing 
with x-ray free-electron lasers” in European XFEL and DESY Photon Science Users' Meeting (DESY, Hamburg, Germany, January 28-30, 2015) [poster].
9. Sang-Kil Son, Koudai Toyota, Ludger Inhester, Yajiang Hao, Kota Hanasaki, Robin Santra, Benedikt Rudek, Artem Rudenko, and Daniel Rolles, “Giant x-ray multiphoton ionization of atoms and molecules” in Multiphoton Processes (Gordon Research Conference, Bryant University, Rhode Island, US, June 24-29, 2018) [poster].
10. Sang-Kil Son, Koudai Toyota, Ludger Inhester, Yajiang Hao, Kota Hanasaki, Robin Santra, Benedikt Rudek, Artem Rudenko, and Daniel Rolles, “Giant x-ray multiphoton ionization of atoms and molecules” in European XFEL and DESY Photon Science Users' Meeting (DESY, Hamburg, Germany, January 23-25, 2019) [poster].
11. Sang-Kil Son, Aaron C. LaForge, Debadarshini Mishra, Markus Ilchen, Stephen Duncanson, Eemeli Eronen, Edwin Kukk, Stanislaw Wirok-Stoletow, Daria Kolbasova, Peter Walter, Rebecca Boll, Alberto De Fanis, Michael Meyer, Yevheniy Ovcharenko, Daniel E. Rivas, Philipp Schmidt, Sergey Usenko, Robin Santra, and Nora Berrah, “Resonance-enhanced multiphoton ionization in the x-ray regime” in XXXII International Conference on Photonic, Electronic and Atomic Collisions (virtual, July 20-23, 2021) [poster].
12. Sang-Kil Son, Aaron C. LaForge, Debadarshini Mishra, Markus Ilchen, Stephen Duncanson, Eemeli Eronen, Edwin Kukk, Stanislaw Wirok-Stoletow, Daria Kolbasova, Peter Walter, Rebecca Boll, Alberto De Fanis, Michael Meyer, Yevheniy Ovcharenko, Daniel E. Rivas, Philipp Schmidt, Sergey Usenko, Robin Santra, and Nora Berrah, “Resonance-enhanced multiphoton ionization in the x-ray regime” in Workshop on Science of “From Matter to Materials and Life” (virtual, November 22-24, 2021) [poster].
13. Sang-Kil Son and Robin Santra, “Unusual phenomena in x-ray multiphoton ionization of atoms” in Science at FELs (DESY and European XFEL, Hamburg, Germany, September 19-23, 2022) [poster].
14. Sang-Kil Son, Aljoscha Rörig, Tommaso Mazza, Philipp Schmidt, Thomas M. Baumann, Benjamin Erk, Markus Ilchen, Joakim Laksman, Valerija Music, Shashank Pathak, Daniel E. Rivas, Daniel Rolles, Svitozar Serkez, Sergey Usenko, Robin Santra, Michael Meyer, and Rebecca Boll, “Multiple-core-hole resonance spectroscopy with ultraintense X-ray pulses” in Workshop on Science of “From Matter to Materials and Life” (University of Jena, Jena, Germany, September 27-29, 2023) [poster].