2025

V. Hennicke, M. Hachmann, P. B. Klar, P. Y.A. Reinke, T. Pakendorf , J. Meyer, H. Delsim-Hashemi, M. Barthelmess, S. Thekku Veedu, P. Fischer, A. C. Rodrigues, J. Wernsmann, F. Lemery, S. Günther, S. Falke, E. Fröjd, A. Mozzanica, L. Palatinus, K. Rossnagel, B. Schmitt, H. N. Chapman, W. Leemans, K. Flöttmann, A. Meents, “3D atomic structure determination with ultrashort-pulse MeV electron diffraction”, arXiv:2507.06936 (2025).

 

2024

Ch. Mahnke, U. Grosse-Wortmann, M. Hachmann, V. Hennicke, Ch. Li, J. Meyer, T. Pakendorf, K. Flöttmann, A. Meents, I. Hartl, "First demonstration of ultrafast-electron diffraction using a 3-GHz electro-optical comb generator as a UV photoinjector laser”, Contribution to EUROPHOTON 2024, EPJ Web of Conferences 307, 02030 (2024).

 

K. Floettmann, “Analytical solution of the field integrals of a cylindrical grid element”, Comp. Phys. Com. 294, 108904 (2024).

 

2023

F. Mayet, K. Floettmann, "Optimization of the resolution of a streaking setup", Phys. Rev. Accel. Beams 26, 112802 (2023).

 

L. Genovese, M. Kellermeier, F. Mayet, K. Floettmann, G. K. L. Wong, M. H. Frosz, R. Assmann, P. St. J. Russell, F. Lemery, “Selective phase filtering of charged beams with laser-driven antiresonant hollow-core fibers”, Phys. Rev. Res. 5, 013096 (2023).

 

R. Bazrafshan, G.H. Kassier, M. Fakhari, H. Delsim-Hashemi, T. Rohwer K. Flöttmann, N.H. Matlis, F. X. Kärtner, ”Development of a Compact Half-Cell RF Photocathode Gun for Single-Shot KeV Ultrafast Electron Diffraction with Femtosecond Resolution“, Contribution to IPAC'23 (2023).

 

R. Bazrafshan, “Compact Pin-Cathode S-band Gun”, Ph D Thesis (2023).

 

2022

 

F. Mayet, M. Hachmann, K. Floettmann, F. Burkart, H. Dinter, W. Kuropka, T. Vinatier, R. Assmann, “Predicting the transverse emittance of space charge dominated beams using the phase advance scan technique and a fully connected neural network”, Phys. Rev. Accel. Beams 25, 09460 (2022).

 

Ch. Mahnke, Ch. Li, H. Tünnermann, C. Vidoli, U. Große-Wortmann, Ch. M. Heyl, L. Winkelmann, I. Hartl, "Photocathode Laser based on a 3 GHz Electro-Optical Comb Generator for the Ultrafast Electron Diffraction Facility REGAE” Contribution to EUROPHOTON 2022, EPJ Web of Conferences 267, 02031 (2022).

 

R. Bazrafshan, M. Fakhari, T. Rohwer, K. Flöttmann, N. H. Matlis, F. X. Kärtner, “Field Enhanced, Compact S-Band Gun Employing a Pin Cathode”, Contribution to IPAC'22 (2022).

 

2021

 

M. Kellermeier, F. Lemery, K. Floettmann, W. Hillert, R. Aßmann, "Self-calibration technique for characterization of integrated THz waveguides", Phys. Rev. Accel. Beams 12, 122001, (2021).

 

R. Stark, K. Flöttmann, F. Grüner, M. Hachmann, B. Zeitler, “Demonstration of a Novel Longitudinal Phase Space Linearization Method without Higher Harmonics”, Contribution to IPAC'21, (2021).

 

2020

 

V. V. Paramonov, K. Floettmann,“ Lower limit of the transverse emittance growth in deflecting rf fields“, Phys. Rev. Accel. Beams 23, 014401 (2020).

 

K. Floettmann, D. Karlovets, “Quantum mechanical formulation of the Busch theorem”, Phys. Rev. A 102, 044517 (2020).

 

K. Floettmann, “Equivalence of Gouy and Courant-Snyder phase”, Phys. Rev. A 102, 033507 (2020).

 

2019

 

F. Lemery, K. Floettmann, P. Piot, F. X. Kärtner, R. Aßmann, “Synchronous acceleration with tapered dielectric-lined waveguides”, Phys. Rev. Accel. Beams 21, 051302 (2018).

 

V. V. Paramonov, V. Danielyan, K. Floettmann, A. Simonyan, V. Tsakanov,”Design, construction and tuning of an RF deflecting cavity for the REGAE facility”, Contribution to LaPlas(2018), J. Phys.: Conf. Ser. 1238 012069 (2019)

 

M. Fakhari, K. Floettmann, R. J. D. Miller, W. Hillert, F. X. Kärtner, “A compact, sub-100-fs RF gun for ultrafast electron diffraction”, Contribution to Ultrafast Optics XII (2019).

 

2018

 

Ch. Li, L. Winkelmann, I. Hartl, ”6 GHz Repetition Rate Photocathode Laser for Multi-Bunch Operation of a Relativistic Electron Gun”, Contribution to CLEO 2018, (2018).

 

V. V. Paramonov, K. Floettmann, V. Danielyan, A. Simonyan, V. Tsakanov, “Start of Operation of a Standing Wave Deflecting Cavity with minimized Level of Aberrations”, Contribution to RuPAC'18 (2018).

 

V. V. Paramonov, K. Floettmann, “RF Test of Standing Wave Deflecting Cavity with minimized Level of Aberrations”, Contribution to LINAC’18 (2018).

 

V. V. Paramonov, K. Floettmann, “Fundamental characteristics of transverse deflecting fields”, arXiv:1806.11023, DESY (2018).

 

S. Lederer, K. Floettmann, L. Lilje, N. Plambeck, “The REGAE Accelerator Vacuum System”, Contribution to IPAC’18 (2018).

 

M. Hachmann, “High precision transverse emittance measurement for novel plasma accelerators at the REGAE Linac”, PhD Thesis (2018).

 

2017

 

H. Daoud, K. Floettmann, R. J. D. Miller, “Compression of high-density 0.16 pC electron bunches through high field gradients for ultrafast single shot electron diffraction: The Compact RF Gun”, Structural Dynamics 4, 044016 (2017).

 

K. Floettmann, “Emittance compensation in split photoinjectors”, Phys. Rev. Accel. Beams 20, 013401 (2017).

 

F. Lemery , K. Floettmann , T. Vinatier , R. W. Assmann, “A Transverse Deflecting Structure with Dielectric-Lined Waveguides in the Sub-THz Regime”, Contribution to IPAC’17 (2017).

 

B. Zeitler, “Phase Space Linearization and External Injection of Electron Bunches into Laser-Driven Plasma Wakefields at REGAE”, PhD Thesis (2017).

 

I. Dornmair, “Advanced Beam Dynamics and Diagnostics Concepts for Laser-Plasma Accelerators”, PhD Thesis (2017).

 

2016

 

I. Dornmair, C. B. Schroeder, K. Floettmann, B. Marchetti, A. R. Maier, “Plasma-driven ultrashort bunch diagnostic”,   Phys. Rev. Accel. Beams 19 , 062801 (2016).

 

M. Hachmann, K. Flöttmann, “Measurement of ultra low transverse emittance at REGAE”, Contribution to EAAC 2015, NIM A 829, 318-320 (2016).

 

M. Hachmann, K. Flöttmann, T. Gehrke, F. Mayet, “Design and characterization of permanent magnetic solenoids for REGAE”, Contribution to EAAC 2015, NIM A 829, 270-273 (2016).

 

H. Delsim-Hashemi, “Single Shot Transversal Profile Monitoring of Ultra Low Charge Relativistic Electron Bunches at REGAE”, Contribution to IBIC’16 (2016).

 

M. Hansli, “Kavitätsbasierende Sensoren zur Strahldiagnose für geringste Intensitäten“, PhD Thesis, TU Darmstadt, Publisher Shaker, ISBN-10: 3844049045 (2016).

 

2015

 

B. Zeitler, K. Floettmann, F. Grüner, “Linearization of the longitudinal phase space without higher harmonic field”, Phys. Rev. ST Accel. Beams 18, 120102 (2015).

 

S. Manz, A. Casandruc, D. Zhang, Y. Zhong, R. A. Loch, A. Marx, T. Hasegawa, L. Ch. Liu, S. Bayesteh, H. Delsim-Hashemi, M. Hoffmann, M. Felber, M. Hachmann, F. Mayet, J. Hirscht, S. Keskin, M. Hada, S.W. Epp, K. Flöttmann, R. J. D. Miller, “Mapping atomic motions with ultrabright electrons: towards fundamental limits in space-time resolution”, Faraday Discuss., 177, 467 (2015).

 

K. Floettmann, “rf-induced beam dynamics in rf guns and accelerating cavities”, Phys. Rev. Accel. Beams 18, 064801 (2015). 

 

I. Dornmair, K. Floettmann, A. R. Maier, “Emittance conservation by tailored focusing profiles in a plasma accelerator”, Phys. Rev. Accel. Beams 18, 041302 (2015).

 

M. Titberidze, F. Grüner, A. R. Maier, B. Zeitler, H. Schlarb, M. Felber, T. Lamb, C. Sydlo, K. Flöttmann, U. Mavric, J. Müller, S. Epp, E. Janas, “Present and Future Optical-to-Microwave Synchronization Systems at REGAE Facility for Electron Diffraction and Plasma Acceleration Experiments”,  Contribution to IPAC’15 (2015).

 

M. Hachmann, K. Floettmann, “Transverse Emittance Measurement at REGAE”, Contribution to IPAC’15 (2015).

 

T, Gehrke, M. Hachmann, K. Floettmann, F. Mayet, “Design and Characterization of Permanent Magnetic Solenoids for REGAE”, Contribution to IPAC’15 (2015). 

 

J. Hirscht, “Femtosecond Electron Diffraction: Next generation electron sources for atomically resolved dynamics”, PhD Thesis (2015).

 

A. Casandruc, “Development and Characterization of Electron Sources for  Diffraction Applications”, PhD Thesis (2015).

 

M. Fakhari, “Design of Radio-Frequency Cavities and Tera-Hertz Electron Injectors for Advanced Applications”, PhD Thesis (2015).

 

M. Titberidze, “Pilot Study of Synchronization on a Femtosecond Scale between the Electron Gun REGAE and a Laser-Plasma Accelerator”, PhD Thesis (2015).

 

2014

 

K. Floettmann, V. V. Paramonov, ” Beam dynamics in transverse deflecting rf structures”, Phys. Rev. STAB 17, 024001 (2014).

 

K. Floettmann. “Adiabatic matching section for plasma accelerated beams”, Phys. Rev. ST Accel. Beams 17, 054402 (2014).  

 

V. V. Paramonov, K. Floettmann, L. Kravchuk, P. Orlov, “Deflecting RF Structures with Reduced Level of Aberrations for Transformation of Particle Distributions in the Bunch”, Phys. Part. Nucl. Lett. 11,  636-641 (2014).

 

M. Titberidze, F. Grüner, A. R. Maier, B. Zeitler, M. Felber, K. Flöttmann, T. Lamb, H. Schlarb, C. Sydlo, E. Janas, “Novel Femtosecond Level Synchronization of Titanium Sapphire Laser and Relativistic Electron Beams”, Contribution to IBIC’14 (2014).

 

M. Hoffmann, L. Butkowski, C. Schmidt, H. Schlarb, W. Koehler, A. Piotrowski, I. Rutkowski, R. Rybaniec, “High Speed Digital LLRF Feedbacks for Normal Conducting Cavity Operation”, Contribution to IPAC’14 (2014).

 

M. Hansli, A. Angelovski, A. Penirschke, R. Jakoby, B. Zeitler, F. J. Gruener, K. Floettmann, D. Lipka, H. Schlarb, S. Vilcins, “A Beam Arrival Cavity for REGAE at DESY”, Contribution to IPAC’14 (2014).

 

Sh. Bayesteh, K. Floettmann, H. Delsim-Hashemi, “Transverse Emittance Measurement at REGAE”, Contribution to IPAC’14 (2014).

 

H. Delsim Hashemi, K. Floettmann, “Dark Current Studies at Relativistic Electron Gun for Atomic Exploration – REGAE”, Contribution to IPAC’14 (2014).

 

M. Fakhari, H. Delsim-Hashemi, K. Floettmann, M. Huening, S. Pfeiffer, H. Schlarb, J. Rossbach, “Design of New Buncher Cavity for Relativistic Electron Gun for Atomic Exploration – REGAE”, Contribution to IPAC’14 (2014).

 

Sh. Bayesteh, “Transverse Electron Beam Diagnostics at REGAE”, PhD Thesis (2014).

 

D. Zhang, “Femtosecond Structural Dynamics on the Atomic Length Scale”, PhD Thesis (2014).

 

2013

 

K. Floettmann, “Generation of sub-fs electron beams at few-MeV energies”, Contribution to EAAC 2013, NIM A 740, 34–38, (2014).

 

I. Rutkowski, L. Butkowski, M. Hoffman, H. Schlarb, C. Schmidt, “REGAE LLRF Control System Overview”, Contribution to IPAC’13 (2013).

 

M. Hoffmann, H. Kay, U. Mavric, H. Schlarb, C. Schmidt, W. Jalmuzna, T. Kozak, A. Piotrowski, “Precision Control for the S-Band Accelerator REGAE”, Contribution to IPAC’13 (2013).

 

C. Schmidt , L. Butkowski, M. Hoffmann, H. Schlarb, R. Rybaniec, M. Grzegrzolka, I. Rutkowski, “High performance and low latency single cavity RF control based on MTCA.4”,

Contribution to ICALEPS2013 (2013).

 

Sh. Bayesteh, H. Delsim-Hashemi, K. Floettmann, “Beam Profile Monitors at REGAE”, Contribution to IBIC’13 (2013).

 

D. Lipka∗, J. Lund-Nielsen, M. Seebach, “Resonator for Charge Measurement at REGAE”,

Contribution to IBIC’13 (2013).

 

H. Delsim-Hashemi, K. Floettmann, M. Seebach, Sh. Bayesteh, “Charge Monitors at The Relativistic Electron Gun for Atomic Exploration – REGAE”, Contribution to IBIC’13 (2013).

 

B. Zeitler, I. Dornmair, T. Gehrke, M. Titberidze, A. Maier, B. Hidding, K. Flöttmann, F. Grüner, “Merging conventional and laser wakefield accelerators”, Contribution to SPIE Optics + Optoelectronics (2013).

 

T. Gehrke, “Design of Permanent Magnetic Solenoids for REGAE”, Master Thesis (2013).

 

2012

 

M. Hada, J. Hirscht, D. Zhang, S. Manz, K. Pichugin, D.A. Mazurenko, S. Bayesteh, H. Delsim-Hashemi, K. Floettmann, M. Huening, S. Lederer, G. Moriena, C. Mueller, G. Sciaini, R.J.D. Miller, “REGAE; New Source for Atomically Resolved Dynamics”, Contribution to International Conference on Ultrafast Structural Dynamics (2012).

 

M. Felber, M. Hoffmann, U. Mavric, H. Schlarb, S. Schulz, Wojciech Jalmuzna, “Laser Synchronization at REGAE Using Phase Detection at an Intermediate Frequency”, Contribution to IPAC’12 (2012).

 

V. V. Paramonov, L. Kravchuk, K. Flöttmann, “RF Parameters of the TE - Type Deflecting Structure for S-Band Frequency Range”, Contribution to LINAC’12 (2012).

 

V. V. Paramonov, L. Kravchuk, K. Floettmann, “Standing Wave RF Deflectors with Reduced Aberrations”, Contribution to RuPAC’12 (2012).

 

Frank Mayet, “Simulation and characterization of the RF system and global stability analysis at the REGAE linear electron accelerator”, Master Thesis (2012).

 

Max Hachmann, “Transverse emittance measurement at REGAE via a solenoid scan”, Master Thesis (2012).

 

2011

 

Sh. Bayesteh, H. Delsim-Hashemi, “Diagnostics of Femtosecond Low-Charge Electron Bunches at REGAE”, Contribution to IPAC’11 (2011).