Publications

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Books
2009
[1] Space-Time Adaptive Numerical Methods: Applied to the Simulation of Charged Particle Beams (S Schnepp), Suedwestdeutscher Verlag fuer Hochschulschriften, 2009. (ISBN-978-3-8381-0666-3) [bibtex] [pdf]
Book Chapters
2015
[1] The Power of Trefftz Approximations: Finite Difference, Boundary Difference and Discontinuous Galerkin Methods; Nonreflecting Conditions and Non-Asymptotic Homogenization (Fritz Kretzschmar, Sascha M Schnepp, Herbert Egger, Farzad Ahmadi, Nabil Nowak, Vadim A Markel, Igor Tsukerman), Chapter in Finite Difference Methods, Theory and Applications, Springer International Publishing, 2015. [bibtex] [pdf]
Refereed Articles
2016
[24] Delayed electron emission in strong-field driven tunnelling from a metallic nanotip in the multi-electron regime (Hirofumi Yanagisawa, Sascha Schnepp, Christian Hafner, Matthias Hengsberger, Dong Eon Kim, Matthias F Kling, Alexandra Landsman, Lukas Gallmann, Jürg Osterwalder), In Nature Scientific Reports, Nature Publishing Group, volume 6, 2016. [bibtex] [pdf]
[23] Pipelined, Flexible Krylov Subspace Methods (Patrick Sanan, Sascha M Schnepp, Dave A May), In SIAM Journal on Scientific Computing, Society for Industrial and Applied Mathematics, volume 38, 2016. [bibtex] [pdf]
[22] Optimal Control of the Inhomogeneous Relativistic Maxwell--Newton--Lorentz Equations (Christian Meyer, SM Schnepp, Oliver Thoma), In SIAM Journal on Control and Optimization, Society for Industrial and Applied Mathematics, volume 54, 2016. [bibtex] [pdf]
[21] A block preconditioned iterative method for Interior Penalty Discontinuous Galerkin discretisations of heterogeneous Stokes flow (Dominic E Charrier, Dave A May, Sascha M Schnepp), In arXiv preprint arXiv:1607.03777, 2016. [bibtex] [pdf]
2015
[20] A priori error analysis of space--time Trefftz discontinuous Galerkin methods for wave problems (Fritz Kretzschmar, Andrea Moiola, Ilaria Perugia, Sascha M Schnepp), In IMA Journal of Numerical Analysis, Oxford University Press, 2015. [bibtex] [pdf]
[19] Transparent boundary conditions for a discontinuous Galerkin Trefftz method (Herbert Egger, Fritz Kretzschmar, Sascha M Schnepp, Igor Tsukerman, Thomas Weiland), In Applied Mathematics and Computation, Elsevier, volume 267, 2015. [bibtex] [pdf]
[18] A Space-Time Discontinuous Galerkin Trefftz Method for Time Dependent Maxwell's Equations (Herbert Egger, Fritz Kretzschmar, Sascha M Schnepp, Thomas Weiland), In SIAM Journal on Scientific Computing, Society for Industrial and Applied Mathematics, volume 37, 2015. [bibtex] [pdf]
2014
[17] Temporal and spectral disentanglement of laser-driven electron tunneling emission from a solid (H Yanagisawa, S M Schnepp, C Hafner, M Hengsberger, A Landsman, L Gallmann, J Osterwalder), In (submitted), 2014. [bibtex] [pdf]
[16] Optimization of a Plasmon-Assisted Waveguide Coupler Using FEM and MMP (M Wang, A Alparslan, S M Schnepp, C Hafner), In PIERB, volume 59, 2014. [bibtex] [pdf]
[15] Error-Driven Dynamical hp-Meshes for the Discontinuous Galerkin Method in Time-Domain (S M Schnepp), In Journal of Computational and Applied Mathematics, volume 270, 2014. [bibtex] [pdf] [doi]
[14] On the numerical modeling of sharp metallic tips (J Mihaljevic, J Niegemann, S M Schnepp, C Hafner), In Quantum Matter, volume 3, 2014. [bibtex] [pdf] [doi]
[13] Non-Dissipative Space-Time hp-discontinuous Galerkin Method for the Time-Dependent Maxwell Equations (M Lilienthal, S M Schnepp, T Weiland), In Journal of Computational Physics (In Press), 2014. [bibtex] [pdf]
[12] Discontinuous Galerkin Methods with Trefftz Approximation (F Kretzschmar, S M Schnepp, I Tsukerman, T Weiland), In Journal of Computational and Applied Mathematics, volume 270, 2014. [bibtex] [pdf] [doi]
2013
[11] NCLab - Public Computing Laboratory (S M Schnepp), In Computing (Springer), volume 95, 2013. [bibtex] [pdf] [doi]
2012
[10] Efficient large scale electromagnetic simulations using dynamically adapted meshes with the discontinuous Galerkin method (S M. Schnepp, T Weiland), In Journal of Computational and Applied Mathematics, volume 236, 2012. [bibtex] [pdf] [doi]
[9] Extension of the Finite Integration Technique including dynamic mesh refinement and its application to self-consistent beam dynamics simulations (S M. Schnepp, E Gjonaj, T Weiland), In Physical Review Special Topics - Accelerators and Beams (PRST-AB), volume 15, 2012. [bibtex] [pdf]
[8] Optimizations of transverse projected emittance at the Photo Injector Test Facility at DESY, location Zeuthen (S. Rimjaem, F. Stephan, M. Krasilnikov, W. Ackermann, G. Asova, J. Baehr, E. Gjonaj, H.J. Grabosch, L. Hakobyan, M. Hänel, Y. Ivanisenko, M. Khojoyan, G. Klemz, S. Lederer, M. Mahgoub, P. Michelato, L. Monaco, M. Nozdrin, B. O’Shea, M. Otevrel, B. Petrosyan, D. Richter, J. Ronsch-Schulenburg, D. Sertore, S. Schreiber, S. Schnepp, A. Shapovalov, R. Spesyvtsev, L. Staykov, G. Vashchenko, T. Weiland, I. Will), In Nucl. Instr. and Meth. A (NIMA), volume 671, 2012. [bibtex] [pdf]
[7] High bandwidth pickup design for bunch arrival-time monitors for free-electron laser (A Angelovski, A Kuhl, M Hansli, A Penirschke, S M Schnepp, M Bousonville, H Schlarb, M K Bock, T Weiland, R Jakoby), In Physical Review Special Topics - Accelerators and Beams, volume 15, 2012. [bibtex] [pdf]
2011
[6] Discontinuous Galerkin Methods with Transient hp-Adaptation (S M. Schnepp, T Weiland), In Radio Science, volume 46 (2011), 2011. [bibtex] [pdf]
2010
[5] Detailed Characterization of Electron Sources at PITZ Yielding First Demonstration of European XFEL Beam Quality (F. Stephan, C. H. Boulware, M. Krassilnikov, J.W. Bahr, G. Asova, A. Donat, U. Gensch, H.-J. Grabosch, M. Hanel, L. Hakobyan, H. Henschel, Y. Ivanisenko, L. Jachmann, S. Khodyachykh, M. Khojoyan, W. Kohler, S. Korepanov, G. Koss, A. Kretzschmann, H. Leich, H. Ludecke, A. Meissner, A. Oppelt, B. Petrosyan, M. Pohl, S. Riemann, S. Rimjaem, M. Sachwitz, S. Schnepp, B. Schoneich, T. Scholz, H. Schulze, U. Schwendicke, A. Shapolov, R. Spesyvtsev, L. Staykov, F. Tonisch, T. Walter, S. Weisse, R. Wenn), In Physical Review Special Topics - Accelerators and Beams (PRST-AB), volume 13, 2010. [bibtex] [pdf] [doi]
[4] A Hybrid Finite Integration-Finite Volume Scheme (S Schnepp, E Gjonaj, T Weiland), In Journal of Computational Physics, volume 229, 2010. [bibtex] [pdf]
2008
[3]An hp-Adaptive Discontinuous Galerkin Method in Time Domain Applied to the Simulation of Highly Localized Current Sources (S Schnepp, E Gjonaj, T Weiland), In ACES Journal Special Issue (2008), 2008. [bibtex]
2007
[2] Operation of a free-electron laser from the extreme ultraviolet to the water window (W. Ackermann, G. Asova, V. Ayvazyan, A. Azima, N. Baboi, J.W. Bahr, Balandi Vn, B. Beutner, Brandt A, A. Bolzmann, R. Brinkmann, O.I. Brovko, M. Castellano, P. Castro, L. Catani, E. Chiadroni, S. Choroba, A. Cianchi, J.T. Costello, D. Cubaynes, J. Dardis, W. and-Hashemi H. Delsim Decking, A. Delserieys, G. Di Pirro, M. Dohlus, S. Dusterer, A. Eckhardt, H.T. Edwards, B. Faatz, J. Feldhaus, K. Flottmann, J. Frisch, L. Frohlich, T. Garvey, U. Gensch, Ch. Gerth, M. Gorler, N. Golubeva, H.-J. Grabosch, V. Gretchko, M. Grecki, O. Grimm, K. Hacker, U. Hahn, J.H. Han, K. Honkavaara, T. Hott, M. Huning, Y. Ivanisenko, E. Jaeschke, W. Jalmuzna, T. Jezynski, R. Kammering, V. Katalev, K. Kavanagh, E.T. Kennedy, S. Khodyachykh, K. Klose, V. Kocharyan, M. Korfer, M. Kollewe, M. Korfer, M. Kollewe, W. Koprek, S. Korepanov, D. Kostin, M. Krassilnikov, G. Kube, M. Kuhlmann, C.L.S. Lewis, L. Lilje, T. Limberg, D. Lipka, F. Lohl, H. Luna, M. Luong, M. Ms, M. Meyer, P. Michelato, V. Miltchev, W.D. Moller, L. Monaco, W.F.O. Muller, O. Napieralski, O. Napoly, P. Nicolosi, D. Nolle, T. Nunez, A. Oppelt, C. Pagani, R. Paparella, N. and-Gutierrez J. Pedregosa Pchalek, B. Petersen, B. Petrosyan, G. Petrosyan, L. Petroysan, J. Pfluger, E. Plonjes, L. Poletto, K. Pozniak, E. Prat, D. Proch, P. Pucyk, P. Radcliffe, H. Redlin, K. Rehlich, M. Richter, M. Roehrs, J. Roensch, R. Romaniuk, M. Ross, J. Rossbach, V. Rybnikov, M. Sachwitz, E.L. Saldin, Sandn Wer, H. Schlarb, B. Schmidt, M. Schmitz, P. Schmuser, J.R. Schneider, E.A. Schneidmiller, S. Schnepp, S. Schreiber, M. Seidel, D. Sertore, A.V. Shabunov, C. Simon, S. Simrock, E. Sombrowski, A.A. Sorokin, P. Spanknebel, R. Spesyvtsev, L. Staykov, B. Steffen, F. Stephan, F. Stulle, H. Thom, K. Tiedtke, M. Tischer, S. Toleikis, R. Treusch, D. Trines, I. Tsakov, E. Vogel, H. T. Weiland Weise, M. Wellhofer, M. Wendt, I. Will, A. Winter, K. Wittenburg, W. Wurth, P. Yeates, M.V. Yurkov, I.A. Zagorodnov, K. Zapfe), In Nature Photonics, volume 1, 2007. [bibtex] [pdf]
2006
[1] Accurate modelling of charged particle beams in linear accelerators (E Gjonaj, T Lau, Felix Wolfheimer, S Schnepp, T Weiland), In New Journal of Physics, volume 8, 2006. [bibtex] [pdf]
Refereed Conference Papers
2014
[20]Trefftz absorbing boundary conditions in analytical, Discontinuous Galerkin and Finite difference form (Fritz Kretzschmar, Farzad Ahmadi, Nabil Nowak, Sascha M Schnepp, Igor Tsukerman, Herbert Egger, Thomas Weiland), In Electromagnetics in Advanced Applications (ICEAA), 2014 International Conference on, 2014. [bibtex]
2013
[19] Comparative Analysis of Different Electro-Optical Intensity Modulator Candidates for the New 40 GHz Bunch Arrival Time Monitor System for Flash and European XFEL (A Kuhl, M K Czwalinna, C Gerth, H Schlarb, C Sydlo, J Rönsch-Schulenburg, J Rossbach, S M Schnepp, T Weiland), In Proceedings of International Beam Instrumentation Conference (IBIC), Oxford, UK, 2013. [bibtex] [pdf]
2012
[18] Generation of Ultra-Short Electron Bunches at FLASH (J Roensch-Schulenburg, E Hass, A Kuhl, T Plath, M Rehders, J Rossbach, N Baboi, MK Bock, M Bousonville, C Gerth, K Klose, T Limberg, U Mavric, H Schlarb, B Schmidt, S Schreiber, B Steffen, C Sydlo, S Wesch, S Vilcins-Czvitkovits, A Angelovski, R Jakoby, A Penirschke, T Weiland, S M Schnepp), In Proceedings of the 34th International Free-Electron Laser Conference, 2012. [bibtex] [pdf]
[17] RF Front End for High Bandwidth Bunch Arrival Time Monitors in Free-Electron Lasers at DESY (A Penirschke, A Angelovski, M Hansli, R Jakoby, C Sydlo, M K Czwalinna, M Bousonville, H Schlarb, A Kuhl, S M Schnepp, T Weiland), In Proceedings of International Beam Instrumentation Conference (IBIC), Tsukuba, Japan, 2012. [bibtex] [pdf]
[16] Analysis of the Electro-Optical Front End for the New 40 GHz Bunch Arrival Time Monitor (A Kuhl, J Rönsch-Schulenburg, J Rossbach, M K Czwalinna, M Bousonville, H Schlarb, C Sydlo, S M Schnepp, T Weiland, A Angelovski, R Jakoby, A Penirschke), In Proceedings of International Beam Instrumentation Conference (IBIC), Tsukuba, Japan, 2012. [bibtex] [pdf]
[15] Realization and Measurements of Cone-Shaped Pickups for Bunch Arrival-Time Monitors for FLASH and XFEL (A Angelovski, M Hansli, A Penirschke, R Jakoby, C Sydlo, M K Czwalinna, H Schlarb, M Bousonville, A Kuhl, S M Schnepp, T Weiland), In Proceedings of International Beam Instrumentation Conference (IBIC), Tsukuba, Japan, 2012. [bibtex] [pdf]
2011
[14] Sensitivity and tolerance analysis of a new bunch arrival time monitor pickup design for FLASH and XFEL (A. Kuhl, S. Schnepp, T. Weiland, A. Angelovski, A. Penirschke, R. Jakoby, M. Bousonville, H. Schlarb), In Proceeding of the 2nd International Particle Accelerator Conference, IPAC2011, San Sebastian, Spain, 2011. [bibtex] [pdf]
[13] Realization of a high bandwidth bunch arrival-time monitor with cone-shaped pickup electrodes for FLASH and XFEL (A. Angelovski, M. Hansli, A. Penirschke, R. Jakoby, A. Kuhl, S. Schnepp, T. Weiland, H. Schlarb, M. Bousonville), In Proceeding of the 2nd International Particle Accelerator Conference, IPAC2011, San Sebastian, Spain, 2011. [bibtex] [pdf]
2010
[12] Discontinuous Galerkin Methods with Transient hp-Adaptation (S Schnepp, M Lilienthal, T Weiland), In IEEE Xplore, 2010. [bibtex] [pdf]
2009
[11] Applying an hp-Adaptive Discontinuous Galerkin Scheme to Beam Dynamics Simulations (S Schnepp, E Gjonaj, T Weiland), In Proceedings of the 10th International Computational Accelerator Physics Conference (ICAP), San Francisco, USA, 2009. [bibtex] [pdf]
2008
[10] Wake Field Simulations for Structures of the PITZ RF Photoinjector: Emittance Growth Estimations (E Arévalo Tribaldos, W Ackermann, S Schnepp, W.F.O Muller, E Gjonaj, T Weiland), In Proceedings of the 11th European Particle Accelerator Conference (EPAC) 2008, 2008. [bibtex] [pdf]
[9] Transverse Effects Due to Vacuum Mirror of RF Gun (M Dohlus, I Zagorodnov, M Krassilnikov, E Gjonaj, S Schnepp), In Proceedings of the 11th European Particle Accelerator Conference (EPAC) 2008, 2008. [bibtex] [pdf]
2007
[8] Analysis of a Particle-In-Cell Code Based on a Time-Adaptive Mesh (S Schnepp, E Gjonaj, T Weiland), In Proceedings of the 22nd Particle Accelerator Conference (PAC), Albuquerque, NM, USA, 2007. [bibtex] [pdf]
2006
[7] A Time-Adaptive Mesh Approach for the Self-Consistent Simulation of Particle Beams (S Schnepp, E Gjonaj, T Weiland), In Proceedings of the International Computational Accelerator Physics Conference (ICAP), Chamonix, Switzerland, 2006. [bibtex] [pdf]
[6] Development of a Self-consistent Particle-In-Cell (PIC) Code Using a Time-adaptive Mesh Technique (S Schnepp, E Gjonaj, T Weiland), In Proceedings of 10th European Particle Accelerator Conference (EPAC) 2006, Edinburgh, Scotland (C. Biscari, H. Owen, Ch. Petit-Jean-Genaz, J. Poole, J. Ton, eds.), 2006. [bibtex] [pdf]
2005
[5] Recent developments at PITZ (M. Krasilnikov, K. Abrahamyan, G. Asova, J. Baehr, G. Dimitrov, U. Gensch, H.-J. Grabosch, J.H. Han, S. Khodyachykh, S. Liu, V. Miltchev, A. Oppelt, B. Petrosyan, S. Riemann, L. Staykov, F. Stephan, M. v. Hartrott, E. Jaeschke, D. Kramer, D. Lipka, D. Richter, J.-P. Carneiroz, K. Floettmann, S. Schreiber, J. Roensch, J. Rossbach, P. Michelato, L. Monaco, C. Pagani, D. Sertore, I. Tsakov, W. Sandner, I. Will, W. Ackermann, W.O. Mueller, S. Schnepp, T Weiland), In Proc. Particle Accelerator Conference (PAC), Knoxville, Tennessee, USA, 2005. [bibtex] [pdf]
2004
[4] Recent results and perspectives of the low emittance photo injector at PITZ (F. Stephan, K. Abrahamyan, G. Asova, J. Baehr, G. Dimitrov, U. Gensch, H.-J. Grabosch, J. H. Han, M. Krasilnikov, D. Lipka, V. Miltchev, A. Oppelt, B. Petrossyan, D. Pose, S. Riemann, L. Staykov, M. v. Hartrott, E. Jaeschke, D. Kraemer, D. Richter, I. Bohnet, I. Carneiro, K. Floettmann, S. Schreiber, J. Rossbach, P. Michelato, L. Monaco, C. Pagani, D. Sertore, I. Tsakov, W. Sandner, I. Will, W. Ackermann, W.F.O. Mueller, S. Schnepp, S. Setzer, T. Weiland), In Proc. 26th International Free Electron Laser Conference (FEL), 2004. [bibtex] [pdf]
[3] Influence of Beam Tube Obstacles on the Emittance of the PITZ Photoinjector (S Setzer, W Ackermann, S Schnepp, T Weiland), In Proceedings of 9th European Particle Accelerator Conference (EPAC) 2004 (J. Chrin, Ch. Petit-Jean-Genaz, J. Poole, C. Prior, H.-A. Synal, eds.), 2004. [bibtex] [pdf]
[2] Investigation of Numerical Noise in PIC-Codes (S Schnepp, Stefan Setzer, T Weiland), In Proceedings of 9th European Particle Accelerator Conference (EPAC) 2004 (J. Chrin, Ch. Petit-Jean-Genaz, J. Poole, C. Prior, H.-A. Synal, eds.), 2004. [bibtex] [pdf]
[1] Transverse emittance measurements at the photo injector test facility at DESY Zeuthen (V. Miltchev, K. Abrahamyan, G. Asova, J. Baehr, G. Dimitrov, H.-J. Grabosch, J. H. Han, M. Krasilnikov, D. Lipka, A. Oppelt, B. Petrossyan, D. Pose, S. Riemann, L. Staykov, F. Stephan, M. v. Hartrott, D. Richter, J. P. Carneiro, K. Floettmann, S. Schreiber, P. Michelato, L. Monaco, D. Sertore, I. Tsakov, I. Will, W. Ackermann, S. Schnepp, S. Setzer), In Proc. 26th International Free Electron Laser Conference (FEL), 2004. [bibtex] [pdf]
Refereed Workshop Papers
2011
[4] Analysis of new pickup designs for the FLASH and XFEL bunch arrival time monitor system (A. Kuhl, S. Schnepp, T. Weiland, A. Angelovski, A. Penirschke, R. Jakoby, M.K. Bock, M. Bousonville, P. Gessler, H. Schlarb, J. Roensch-Schulenburg, J. Roßbach), In Proceeding of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC2011, Hamburg, Germany, 2011. [bibtex] [pdf]
[3] Pickup Design for a High Resolution Bunch Arrival Time Monitor for FLASH and XFEL (A. Angelovski, R. Jakoby, A. Kuhl, A. Penirschke, S. Schnepp, M.K. Bock, M. Bousonville, P. Gessler, H. Schlarb, J. Roensch-Schulenburg, J. Roßbach, T. Weiland), In Proceeding of the 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC2011, Hamburg, Germany, 2011. [bibtex] [pdf]
2010
[2]Discontinuous Galerkin Methods with Transient hp-Adaptivity (M Lilienthal, S Schnepp, T Weiland), In Proceedings of the 10th International Workshop on Finite Elements for Microwave Engineering (FEM 2010), 2010. [bibtex]
[1] Recent Upgrade of the PITZ Facility (J.W. Bahr, A. Donat, U. Gensch, H.-J. Grabosch, M. Hanel, L. Hakobyan, R. Heller, Y. Ivanisenko, L. and-Juboori H. Mahdi Al Jachmann, M. Khojoyan, G. Klemz, W. Kohler, G. Koss, M. Krassilnikov, A. Kretzschmann, H. Leich, M. Mahgoub, D. Melkumyan, J. Meissner, M. Otevrel, M. Penno, B. Petrosyan, M. Pohl, S. Rimjaem, C. Ruger, M. Sachwiz, S. Schnepp, B. Schoneich, J. Schultze, A. Shapolov, F. Stephan, M. Tanha, G. Trowitzsch, G. Vashchenko, T. Walter, X. Wang, S. Weisse, R. Wenndorff, M. Winde, L. Vashchenko, T. Walter, X. Wang, S. Weisse, R. Wenndorff, M. Winde, L. Van Wu, A. Brinkmann, S. Lederer, K. Flottmann, F. Obier, D. Reschke, S. Schreiber, G. Asova, I. Bonev, I. Tsakov, A. Adamietz, D. Holder, B. Militsyn, B. Muratori, C. Richter, J. Roensch, J. Rossbach, I. Will, P. Michelato, L. Monaco, L. Pagani, D. Sertore, W. Ackermann, W.F.O. Muller, S. Schnepp, T. Weiland), In Proceedings of the 2010 Beam Instrumentation Workshop (BIW 2010), 2010. [bibtex] [pdf]