Baumann, T. M.; Crespo López-Urrutia, J. R.; Schwarz, S.; Lapierre, A.; Bollen, G.; Kester, O.; Dilling, J.; Ullrich, J.: Spectroscopic studies of the charge breeding process in high current electron beam ion traps. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 6), 062025, (2012)

Bergues, B.; Kübel, M.; Johnson, N. G.; Betsch, K. J.; Jones, R. R.; Ben-Itzhak, I.; Paulus, G. G.; Moshammer, R.; Ullrich, J.; Krausz, F. et al.; Kling, M. F.: Confining the double ionization dynamics of argon to half of a laser cycle. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 3), 032026, (2012)

Bernitt, S.; Brown, G. V.; Crespo López Urrutia, J. R.; Rudolph, J.; Steinbrügge, R. F.; Graf, A.; Leutenegger, M.; Beilmann, C.; Eberle, S.; Epp, S. W. et al.; Kubicek, K.; Mäckel, V.; Schippers, S.; Schlotter, W.; Simon, M. C.; Träbert, E.; Turner, J.; Kahn, S. M.; Magee, E. W.; Müller, A.; Porter, F. S.; Rasmussen, A.; Beiersdorfer, P.; Ullrich, J.: X-ray laser spectroscopy with an electron beam ion trap at the free electron laser LCLS. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 ( part 3), 032037, (2012)

Britsch, M.; for the LHCb Collaboration: Inclusive particle production at LHCb. In: Proceedings of the XXth International Workshop on Deep-Inelastic Scattering and Related Topics DIS 2012, 142 (Ed. Brock, I.C.). XXth International Workshop on Deep-Inelastic Scattering and Related Topics, DIS 2012 , Bonn, Germany, March 26, 2012 - March 30, 2012. Verlag Deutsches Elektronen-Synchrotron, Hamburg (2012)

Jiang, Y. H.; Rudenko, A.; Kübel, M.; Herrwerth, O.; Foucar, L.; Kurka, M.; Kühnel, K. U.; Senftleben, A.; Kling, M. F.; Sturm, F. P. et al.; van Tilborg, J.; Belkacem, A.; Motomura, K.; Yamada, A.; Ueda, K.; Düsterer, S.; Treusch, R.; Schröter, C. D.; Moshammer, R.; Ullrich, J.: Time-resolved XUV-induced isomerization and H₃ formation in C₂H₄ cation. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 3), 032014, (2012)

Mokler, P. H.; Beilmann, C.; Bernitt, S.; Harman, Z.; Keitel, C. H.; Postavaru, O.; Ullrich, J.; Crespo López-Urrutia, J.R.: Higher order resonant intershell electronic recombination for highly charged ions. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 6), 062043, (2012)

Nagaya, K.; Iwayama, H.; Yase, S.; Sugishima, A.; Mizoguchi, Y.; Yao, M.; Fukuzawa, H.; Motomura, K.; Yamada, A.; Wang, C. et al.; Liu, X.-J.; Ueda, K.; Saito, N.; Rudenko, A.; Faucer, L.; Kurka, M.; Kühnel, K.-U.; Ullrich, J.; Czasch, A.; Dörner, R.; Feifel, R.; Piseri, P.; Mazza, T.; Devetta, M.; Coreno, M.; Belkacem, A.; Nagasono, M.; Higashiya, A.; Tono, K.; Yabashi, M.; Ishikawa, T.; Ohashi, H.; Kimura, H.; Togashi, T.; Senba, Y.: Multiple photoionization of rare-gas clusters by EUV-FEL at Spring-8. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 3), 032082, (2012)

Osipov, T.; Rolles, D.; Bostedt, C.; Castagna, J.-C.; Hartmann, R.; Bozek, J. D.; Schlichting , I.; Strüder, L.; Ullrich, J.; Berrah, N.: Next Generation Endstation for Concurrent Measurements of Charged Products and Photons in LCLS FEL Experiments. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 14), 142025, (2012)

Pflüger, T.; Ren, X.; Senftleben, A.; Dorn, A.; Ullrich, J.: A kinematically complete (e, 2e)-experiment on small rare gas clusters. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 4), 042044, (2012)

Ren, X.; Bray, I.; Fursa, D. V.; Pflüger, T.; Senftleben, A.; Dorn, A.; Ullrich, J.: (e, 2e) on helium: complete agreement between experiment and theory. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 4), 042043, (2012)

Ren, X.; Pflüger, T.; Xu, S.; Senftleben, A.; Colgan, J.; Pindzola, M. S.; Dorn, A.; Ullrich, J.: Electron impact induced break-up of aligned H₂: molecular frame (e, 2e) studies. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 5), 052037, (2012)

Ritter, R.; Kowarik, G.; Ginzel, R.; Wilhelm, R.; Heller, R.; Papaléo, R. M.; Rupp, W.; Crespo López-Urrutia, J.R.; Ullrich, J.; Facsko, S. et al.; Aumayr, F.: Nano-craters due to impact of individual highly charged ions on surfaces and thin films. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 13), 132028, (2012)

Schippers, S.; Ricz, S.; Buhr, T.; Hellhund, J.; Müller, A.; Klumpp, S.; Martins, M.; Flesch, R.; Rühl, E.; Lower, J. et al.; Jahnke, T.; Metz, D.; Schmidt, L. P. H.; Dörner, R.; Ullrich, J.; Wolf, A.: Photon-ion spectrometer PIPE at the Variable Polarization XUV Beamline of PETRA III. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 14), 142016, (2012)

Schulz, M.; Fischer, D.; Schneider, K.; Moshammer, R.; Ullrich, J.; Ciappina, M. F.; Kirchner, T.: Systematic Analysis of Four-Particle Dalitz Plots for Double Ionization. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 8), 082018, (2012)

Schuricke, M.; Veeravalli, G.; Zhu, G.; Dornes, C.; Joachimsmeyer, K.; Dorn, A.; Ullrich, J.: Two-Photon Double Ionization of Lithium at FLASH. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 3), 032054, (2012)

Schwarz, M.; Crespo López-Urrutia, J. R.; Brunner, F. R.; Ballance, T.; Drewsen, M.; Schmidt, P. O.; Ullrich, J.: A cryogenic Paul Trap for Highly Charged Ions and Molecular Ions. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 12), 122005, (2012)

Senftleben, A.; Pfeifer, T.; Jiang, Y. H.; Rudenko, A.; Herrwerth, O.; Foucar, L.; Kurka, M.; Kühnel, K. U.; Kübel, M.; Kling, M. F. et al.; Yamada, A.; Motomura, K.; Ueda, K.; Düsterer, S.; Treusch, R.; Schroeter, C.D.; Moshammer, R.; Ullrich, J.: Investigating temporal structure of FEL pulses by XUV pump–probe autocorrelation measurements. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 3), 032011, (2012)

Xu, S.; Ma, X.; Ren, X.; Senftleben, A.; Pflüger, T.; Dorn, A.; Ullrich, J.: Electron impact dissociative ionization of methane: Formation of protons. 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC 2011), Belfast, North Ireland, July 27, 2011 - August 02, 2011. Journal of Physics: Conference Series 388 (part 5), 052011, (2012)

Volyanskyy, D.; on behalf of the LHCb collaboration: Minimum-bias physics with the LHCb experiment. 3rd International Workshop on Multi-Parton Interactions at the LHC, DESY, Hamburg, Germany,, November 21, 2011 - November 25, 2011. CERN Document Server CERN-LHCb-PROC-2011-088, 088, (2012)

Agostini , M.; Barnabé-Heider, M.; Budjas, D.; Cattadori, C.; D’Andragora, A.; Gangapshev, A.; Gusev, K.; Heisel, M.; Junker, M.; Klimenko, A. et al.; Schönert, S.; Smolnikov, A.; Zuzel, G.: LArGe: R&D for active background suppression in GERDA. 12th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2011. Journal of Physics: Conference Series 375, 042009, (2012)