Igor Zagorodnov Curriculum Vitae

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1 Igor Zagorodnov Curriculum Vitae June 2010 Hamburg, Germany Affiliation: Address: Permanent staff position in Accelerator Physics Group (MPY), Deutsches Electronen Synchrotron (DESY), Germany DESY, MPY, Notkestrasse 65, D Hamburg, Germany Tel.: +49 / 040 / ; Fax.: +49 / 040/ ; igor.zagorodnov@desy.de Website: Date of Birth: August 7, 1968 Nationality: Russian Specialization: Main Field: Accelerator Physics, Electrodynamics, Numerical Methods. Current Research Interests: Beam Dynamics, Impedance and Wakefield Calculations for Accelerators, Physics of Free Electron Lasers, Finite-Difference Time Domain and Boundary Elements Methods for Electrodynamics, Simulations for Accelerators with ECHO, MAFIA, Microwave Studio, Genesis, ALICE Developing of software for wakefield and beam dynamic self-consistent simulations (Visual C++, Delphi, Fortran, MatLab, Mathematica, Python) Other Fields: Digital Signal Processing, Group Theory in Numerical Modeling. Scientific Qualification: Education: Doctorate Degree (Ph. D.) in Physics and Mathematics, Lomonosov Moscow State University, Moscow, Russia. Ph.D. thesis title Numerical Methods for Solving the Problems of Wave Diffraction by Structures with the Cube Symmetry Group (MSU, 1998). The project is devoted to developing of fast numerical methods for solution of problems of electromagnetic wave scattering on structures with symmetries. Diploma work Asymptotic of Solutions of Singular Perturbed Problems with Degeneration (MSU, 1994) Post Graduated Department of Computational Mathematics and Cybernetics Faculty of Lomonosov Moscow State University (MSU), Moscow, Russia.

2 Department of Mathematical Physics, Computational Mathematics and Cybernetics Faculty of MSU, Moscow, Russia. Diploma with honours Zaporozhye Pedagogical College, Zaporozhye, Ukraine. Diploma with honours. Publications: 28 scientific publications in reviewed international journals (Physical Review, Journal of Computational Physics, Nature Photonics, Int. J. Num. Mod., J. Comm. Technology and Electronics, Comp. Math. and Math. Physics), 30 presentations at international conferences (PAC, EPAC, ICAP, FEL), many technical reports (DESY, SLAC, TRIESTE). Honors and Awards: Scholarship of Deutsche Forschungsgemeinschaft, Professional Activities: Reviewer for numerous journals (Physical Review, Progress in Electromagnetic Research, IEEE Transactions, New Journal of Physics, Journal of Physics D: Applied Physics) Student supervision (Miguel Astner (2003), Numerical Solution of Maxwell s Equations for Structures with Abelian Symmetry Groups, TU Darmstadt) Consulting of PhD students (TU Darmstadt, Universität Hamburg, see list of publications) Scientific international cooperation with SLAC (USA), BNL (USA), Fermilab (Usa), Trieste (Italy). Professional Career: 2005 pr. Research position in Accelerator Physics Group, Deutsches Electronen Synchrotron (DESY), Germany I am working for the European Free Electron Laser (XFEL) and the future International Linear Collider projects. My recent tasks are: - development of algorithms and software for beam dynamic studies (ALICE, ECHO, GlueTrack), - beam dynamics simulations for FLASH and XFEL, - wake field and impedance calculations with MAFIA, ECHO and CST Microwave Studio, - XFEL simulations with Genesis, ALICE, Research position in Computational Electrodynamics Laboratory, Technische Universitaet Darmstadt (Schloßgarten Str. 8, D Darmstadt, Germany) I had been a leading researcher in the Deutsche Forschungsgemeinschaft project WE 1239/22 devoted to developing of software for impedance and wakefield calculations. New numerical methods and software have been developed. The code ECHO allows to calculate the longitudinal and transverse wakes for ultra-short bunches in particle accelerators. A range of new problems for ultra-short bunches in accelerators was solved: wakefields in small-angle collimators, estimation of transverse wake function for TESLA accelerating structure, near-wall wake fields in collimators Research position in Computational Electromagnetics Laboratory, Computational Mathematics and Cybernetics Faculty, Moscow State University (Vorobyev Hills, Moscow, Russia) The algorithms and the software for modeling of acoustic and electromagnetic waves scattering by surfaces with finite group of symmetries (surfaces of revolution with holes of arbitrary shape,

3 penetrative bodies with cubic symmetry group, etc.) have been developed. The algorithms are based on Boundary Integral Equations. Usage of symmetry of the scattering objects has allowed to drastically reduce the computation time for the case of arbitrary excitation Research position in Applied Mathematics Laboratory, Research Institute of Pulse Techniques (Luganskaya st. 9, Moscow, Russia) I have developed algorithms and software for modeling electron optical devices. The code allows to solve electrostatic problem for multiply connected domains of arbitrary shape and to do tracking of electrons in the electrostatic field Engineer of Automation Laboratory, Joint Stock Company Mashinostroitelny Zavod (K.Marx st. 12, Moscow Region, Electrostal, Russia) I have developed several computer based systems for gathering and monitoring technological process parameters. The systems are based on analog-to-digital converters bound with PC Compulsory Military Service, Air Forces, technician of aircraft armament (the Soviet Union) Languages: Russian (native), English, German Personal: Married, two sons 1995, 2000

4 List of Publications a) Refereed Journals 1. Zagorodnov I., Dohlus M., A Semi-Analytical Modelling of Multistage Bunch Compression with Collective Effects, Phys. Rev. ST Accel. Beams, 2010 (to be submitted). 2. Dohlus M., Zagorodnov I., Zagorodnova O., High Frequency Impedances in European XFEL, Phys. Rev. ST Accel. Beams, 2010 (submitted). 3. Dohlus M., Zagorodnov I., Explicit TE/TM Scheme for Particle Beam Simulations// Journal of Computational Physics, vol. 225, No. 8, pp , Bane K.L.F., Stupakov G., Zagorodnov I., Impedance Calculations of Non-Axisymmetric Transitions Using the Optical Approximation, Phys. Rev. ST Accel. Beams, vol.10, No. 7, , Stupakov G., Bane K.L.F., Zagorodnov I., Optical approximation in the theory of geometric impedance, Phys. Rev. ST Accel. Beams, vol.10, No. 5, , Zagorodnov I., Schuhmann R., Weiland T., Conformal FDTD-methods to avoid Time Step Reduction with and without Cell Enlargement, Journal of Computational Physics, vol. 225, No. 2, pp , Tenenbaum P. et al., Direct Measurement of the Transverse Wakefields of Tapered Collimators, Phys. Rev. ST Accel. Beams, Vol. 10, No.3, , Ackerman W. et al., Operation of a free electron laser from the extreme ultraviolet to the water window// Nature Photonics, vol. 1, pp , Fujita K.et al, Scattered-field Time Domain Boundary Element Method and Its Application to Transient Electromagnetic Field Simulation in Particle Accelerator Physics, IEICE Transactions on Electronics, Vol.E90-C, No.2, pp , Zagorodnov I., Indirect Methods for Wake Potential Integration, Phys. Rev. ST Accel. Beams, vol. 9, No. 10, , Zagorodnov I., Weiland T., TE-TM Alternating Direction Scheme for Wakefield Calculations in 3D, Nuclear Instruments and Methods in Physics Research Section A, vol. 558, No. 1, pp , Fujita K., Kawaguchi H., Weiland T., Zagorodnov I., Time Domain Wake Field Computation with Boundary Element Method, IEEE Trans. Nuclear Science, vol. 53, No. 2, pp , Craievich P., Weiland T., Zagorodnov I., The Short-Range Wakefields in the BTW Accelerating Structure of the ELLETRA linac, Nuclear Instruments and Methods in Physics Research Section A, vol. 558, No.1, Pages 58-61, V. Ayvazyan et al, First operation of a free- electron laser generating GW power radiation at 32 nm wavelength, The European Physical Journal D, vol. 37, pp , Zagorodnov I.A, Weiland T., TE/TM Field Solver for Particle Beam Simulations without Numerical Cherenkov Radiation, Phys. Rev. ST Accel. Beams, vol. 8, No. 4, , Zagorodnov I., Weiland T., TE/TM Scheme for Computation of Electromagnetic Fields in Accelerators, Journal of Computational Physics, vol. 207, No.1, pp , Sievers D., Zagorodnov I.A., Weiland T., Anwendung finiter Symmetriegruppen zur Beschleunigung der numerischen Lösung von Streuproblemen, Frequenz, vol. 58, No , pp , Zagorodnov I., Schuhmann R.,Weiland T., Long-Time Numerical Computation of Electromagnetic Fields in the Vicinity of a Relativistic Source, Journal of Computational Physics, vol. 191, No.2, pp , 2003.

5 19. Zagorodnov I., Schuhmann R.,Weiland T., A Uniformly Stable Conformal FDTD-Method on Cartesian Grids, International Journal on Numerical Modeling, vol. 16, No.2, pp , Weiland T., Zagorodnov I., Maxwell s Equations for Structures with Symmetries, Journal of Computational Physics, vol. 180, No. 1, pp , Zagorodnov I.A., Tarasov R.P., Computational Schemes for the Problem of Acoustical Excitation of an Axially Symmetric Domain with a Two-Component Boundary through a Hole on the Boundary, Computational Mathematics and Mathematical Physics, vol. 42, No. 8, pp , Zagorodnov I.A., Ilinski A.S., Tarasov R.P., Diffraction by a Dielectric Cube, a Dielectric Octahedron and a Dielectric Hexoctahedron, Journal of Communication Technology and Electronics, vol. 46, No.4, pp , Zagorodnov I.A., Ilinski A.S., Tarasov R.P., Grid Boundary Equations on Conducting Surfaces with Symmetries and Their Numerical Analysis in Problems of Diffraction by a Sphere, Computational Mathematics and Mathematical Physics, vol. 41, No. 5, pp , Zagorodnov I.A., Tarasov R.P., Finite Groups and a Numerical Solution to the Problems of the Theory of Wave Scattering, Journal of Communication Technology and Electronics, vol. 45, No. 2, pp , Zagorodnov I.A., Tarasov R.P., Boundary Integral Equations of the First and Second Kind for Numerical Solution of the Problem of Diffraction by Polyhedrons near Interior Resonances, Computational Mathematics and Mathematical Physics, vol. 40, No. 10, pp , Tarasov R.P., Zagorodnov I.A., Diffraction by Perfectly Conducting Cube, Journal of Communication Technology and Electronics, vol. 44, No.4, pp , Zagorodnov I.A., Numerical Solution of Integral Equations of First and Second Kind in Scalar and Vector Problems of Diffraction on a Cube, Computational Mathematics and Modelling, vol. 10, No. 1, pp 28-36, Zakharov Y.V., Zagorodnov I.A., Tarasov R.P. Hyper-Singular Integral Equations in Problems of the Diffraction on a Cube, Vestnik of Moscow State University, No.3, pp , Zagorodnov I.A., Tarasov R.P. Numerical Solution of the Problems of Scattering by Platonic Bodies in the Classes of Functions Invariant under Symmetry Transformations, Computational Mathematics and Mathematical Physics, vol.38, No. 8, pp , Zagorodnov I.A., Tarasov R.P., The Problem of Scattering from Bodies with Noncommutative Finite Group of Symmetries and its Numerical Solution, Computational Mathematics and Mathematical Physics, vol. 37, No. 10, pp , b) Conference Proceedings 31. Zagorodnov I., Ultra-short low charge operation at FLASH and the European XFEL, in Proceedings of International Conference on Free Electron Laser 2010, (to be presented, invited). 32. Zagorodnov I., Dohlus M., Multistage bunch compression, in Proceedings of International Conference on Free Electron Laser 2010, (to be presented). 33. Zagorodnov I., Dohlus M., Numerical FEL studies with a new code ALICE, in Proceedings of 31th International Conference on Free Electron Laser (FEL09), Liverpool, United Kingdom, pp , 2009.

6 34. Tsakanian A.V., Dohlus M., Zagorodnov I., Numerical Calculation of Wake Fields in Structures with Conductive Walls, in Proceedings of 23rd Particle Accelerator Conference (PAC09), Vancouver, Canada, Behrens C., Gerth C., Zagorodnov I., Numerical Performance Studies on the new Sliced- Beam-Parameter Measurement Setup for FLASH, in Proceedings of 31th International Conference on Free Electron Laser (FEL09), Liverpool, United Kingdom, p. 599, Dohlus M., Zagorodnov I., Krasilnikov M., Gjonaj E., Schnepp S., Transverse Effects due to Vacuum Mirror of RF Gun, in Proceedings of 11th European Particle Accelerator Conference (EPAC'08), Genoa, Italy, p. 1615, Dohlus M., Zagorodnov I., Gjonaj E., Weiland T., Coupler Kick for Very Short Bunches and its Compensation, in Proceedings of 11th European Particle Accelerator Conference (EPAC'08), Genoa, Italy, p. 582, Bane K.L.F. et al, Wakefield and RF Kicks due to Coupler Asymmetry in TESLA-type Accelerating Cavities, in Proceedings of 11th European Particle Accelerator Conference (EPAC'08), Genoa, Italy, p. 1571, Tsakanian A., Dohlus M., Zagorodnov I., Numerical Studies of Resistive Wall Effects, in Proceedings of 11th European Particle Accelerator Conference (EPAC'08), Genoa, Italy, p.1709, Prat E. et al, Impact of Electromagnetic Fields in TESLA RF Modules on Transverse Beam Dynamics, in Proceedings of 11th European Particle Accelerator Conference (EPAC'08), Genoa, Italy, Podobedov B., Zagorodnov I., Impedance Minimization by Nonlinear Tapering, in Proceedings of 22nd Particle Accelerator Conference (PAC07), Albuquerque, USA, pp , Zagorodnov I., Dohlus M., Coupler Kick, in Proceedings of Linear Collider Workshop 2007 (ILC 2007), Hamburg,Germany, p.795, Zagorodnov I., Bane K., Wakefield Calculations for 3D Collimators, in Proceedings of EPAC 2006 Conference, Edinburgh, Scotland, 2006 (SLAC-PUB-11938). 44. Bane K., Zagorodnov I., Wakefields in the LCLS Undulator Transitions, in Proceedings of EPAC 2006 Conference, Edinburgh, Scotland, 2006 (SLAC-PUB-11937). 45. Zagorodnov I., Solyak N,, Wakefield Effects of New ILC Cavity Shapes, Proceedings of EPAC 2006 Conference, Edinburgh, Scotland, Dohlus M., Zagorodnov I., Start-To-End Simulations for the European XFEL, inproceedings of FLS 2006, Hamburg, Schuhmann R., Zagorodnov I.A, Weiland T., A Simplified Conformal (SC) Method for Modeling Curved Boundaries, in Proceedings of International Microwave Symposium Watson N.K. et al, Direct Measurement of Geometric and Resistive Wakefields, in Proceedings of EPAC 2006 Conference, Edinburgh, Scotland, Woods M. et al, A Test Facility for the International Linear Collider, in Proceedings of PAC 2005 Conference, Knoxville, Tennessee, USA, 2005 (SLAC-PUB-11180). 50. Lau T., Gjonaj E., Weiland T., Zagorodnov I., Numerical Dispersion Error Reduction in EM Calculations for Accelerators, in Proceedings of PAC 2005 Conference, Knoxville, Tennessee, USA, Craievich P., D Auria G.,Weiland T., Zagorodnov I., The Short-Range Wakefields in the BTW Accelerating Structure of the ELLETRA linac, in Proceedings of FEL 2004 Conference, Trieste, Italy, Zagorodnov I., Weiland T., Dohlus M., Wakefield Calculations for TTF-II, in Proceedings of EPAC 2004 Conference, Lucerne, Switzerland, 2004.

7 53. Hampel R., Weiland T., Zagorodnov I.,, New Discretization Scheme for Wake Field Computation in Cylindrically Symmetric Structures, in Proceedings of EPAC 2004 Conference, Lucerne, Switzerland, Fujita K., Kawaguchi H., Weiland T., Zagorodnov I., MPI Parallel Computation of Wake Fields by Using Time Domain Boundary Element Method, in Proceedings of EPAC 2004 Conference, Lucerne, Switzerland, Zagorodnov I., Bane K.,Weiland T., Calculations of Collimator Wakefields, in Proceedings of PAC 2003 Conference, USA, 2003 (SLAC-PUB-9727). 56. Zagorodnov I., Weiland T., The Short-Range Transverse Wakefields in TESLA Accelerating Structure, in Proceedings of PAC 2003 Conference, USA, Zagorodnov I., Weiland T., Calculation of Transversal Wake Potential for Short Bunches, in Proceedings of ICAP 2002 Conference, Lansing, USA, Ratschow S.,Weiland T., Zagorodnov I., On the Applicability of the Thin Dielectric Layer Model for Wakefield Calculation, in Proceedings of ICAP 2002 Conference, Lansing, USA, Zagorodnov I., Weiland T., A Conformal Scheme for Wake Field Calculation, in Proceedings of EPAC 2002 Conference, Paris, France, 2002, pp Ilinski A.S., Zagorodnov I.A., Tarasov R.P. Aperture coupling in the bodies possessing a finite symmetry group, in Proceedings of MMET2000 Conference, Kharkov, Ukraine, September 12-15, 2000, pp Zagorodnov I.A., Tarasov R.P., Finite groups in numerical solution of electromagnetic scattering problems on non-spherical particles, in Proceedings of Fifth International Conference on Light Scattering by Nonspherical Particles, Halifax, Canada, August 28- September 1, 2000, pp Zagorodnov I.A., Tarasov R.P. A Numerical Solution of the Problem of Scattering of Acoustic Wave on a Cube, in Transactions of VII International Symposium A Method of Discrete Singularities in the Problems of Mathematical Physics, Feodosiya, Ukraine, 1997, pp c) Internal Reports 63. Dohlus M., Zagorodnov I., Zagorodnova O., High Frequency Impedances in European XFEL,DESY , Tsakanian A., Dohlus M., Zagorodnov I., The Effect of the Metal Oxidation on the Vacuum Chamber Impedance, TESLA-FEL , Bane K.L.F., Stupakov G., Zagorodnov I., Impedance Calculations of Non-Axisymmetric Transitions Using the Optical Approximation, DESY , SLAC-PUB-12370, James Brau (Ed.) et al, ILC Reference Design Report, e-print: arxiv: , A. Aghababyan et al, XFEL - The European X-Ray Free-Electron Laser - Technical Design Report, DESY , Zagorodnov I., Indirect Methods for Wake Potential Integration, DESY , Dohlus M., Limberg T., Zagorodnov I., Impact of Undulator Wake-Fields and Tapering on the European X-Ray FEL Performance, TESLA-FEL , Bane K., Zagorodnov I., Wakefields in the LCLS Undulator Transitions, SLAC-PUB , Zagorodnov I., Weiland T., Dohlus M., Wake Fields Generated by the LOLA-IV Structure and the 3 rd Harmonic Section in TTF-II, TESLA , Craievich P., Weiland T., Zagorodnov I., The Short-Range Wakefields in the BTW Accelerating Structure of the ELLETRA linac, ST/M-04/02, Trieste,2004.

8 73. Zagorodnov I., Weiland T., Dohlus M., Koerfer M., Near-Wall Wakefilds for Optimized Geometry of TTF 2 Collimator, TESLA , DESY, Weiland T., Zagorodnov I., The Short-Range Transverse Wake Function for TESLA Accelerating Structure, TESLA , DESY, Zagorodnov I., Bane K., Weiland T., Numerical Calculations of Small-Angle Collimator Wakefields for Short Bunches, TESLA , DESY, SLAC-PUB-9985, d) other 76. Zagorodnov I.A., Numerical Methods for Solving the Problems of Wave Diffraction by Structures with the Cube Symmetry Group// Ph.D. Thesis, Moscow State University, Moscow, 1998.