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Dissertations / Theses on the topic 'Ultrafast Electron Diffraction'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Ihee, Hyotcherl Zewail Ahmed H. Zewail Ahmed H. "Ultrafast electron diffraction /." Diss., Pasadena, Calif. : California Institute of Technology, 2001. http://resolver.caltech.edu/CaltechETD:etd-04072008-112244.

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2

Xu, Junliang. "Ultrafast imaging: laser induced electron diffraction." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/13616.

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Doctor of Philosophy<br>Department of Physics<br>Chii-Dong Lin<br>Imaging of molecules has always occupied an essential role in physical, chemical and biological sciences. X-ray and electron diffraction methods routinely achieve sub-angstrom spatial resolutions but are limited to probing dynamical timescales longer than a picosecond. With the advent of femtosecond intense lasers, a new imaging paradigm emerges in last decade based on laser-induced electron diffraction (LIED). It has been placed on a firm foundation by the quantitative rescattering theory, which established that large-angle e

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3

Krecinic, Faruk [Verfasser]. "Ultrafast electron diffraction and imaging using ionized electrons / Faruk Krecinic." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1142155447/34.

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4

Chatelain, Robert P. 1982. "RF compression of electron bunches applied to ultrafast electron diffraction." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=111943.

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The dynamics of atomic scale structures during structural change can be studied by Ultrafast Electron Diffraction (UED). The time resolution needed to reveal the fastest dynamics is 100 fs. Sub-angstrom structural resolution becomes possible with 1-1000 pC of charge necessary for diffraction pattern analysis during subtle structural changes. This combination of requirements cannot currently be realized due to the space-charge temporal broadening inherent to bunches of electrons of high fluence and short temporal duration. Simulations show that the incorporation of a specially designed Radio-Fr

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5

Rohwer, Andrea Berenike. "Introducing organic molecular crystals into ultrafast electron diffraction." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95819.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Organic molecular salts have a wide range of physical properties which can be chemically tailored by minor variations of their substituents. These characteristics include high degrees of anisotropy, electrical conductivity ranging from superconducting to insulating, and structural changes in the crystal lattice during first order phase transitions brought about by minimal changes in temperature, effective pressure, and in some cases even light. Hence, these materials are particularly interesting for the development of molec

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6

Cortelli, Giorgio. "Ultrafast electron diffraction on materials exposed to intense free electron laser pulses." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/19305/.

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The advent of Free Electron Lasers (FELs) has opened unprecedented opportunities for the study of transient states of matter. The use of the seeding technique, developed at the FERMI FEL in Trieste (Italy), pushed further the frontier allowing to perform pump-probe experiments with femtosecond time resolution. FELs permit shedding light onto unexplored non-equilibrium dynamics and processes in matter. In this thesis, a pioneering setup for monitoring sub-picosecond atomic structure changes in materials is described. The FEL is used as an isochoric pump while a 100 keV compressed electron bunch

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7

Ghunaim, Thana. "Magnetic lens design for an ultrafast electron diffraction beamline." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40798.

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Ultrafast electron diffraction (UED) is an emerging technique for studies of transition state and material structural dynamics at the atomic-level. UED is a time-resolved diffraction technique that uses femtosecond laser pulses to initiate a chemical or material transformation and an ultrashort electron pulse to follow the structural evolution that results through changes in the electron diffraction pattern of the sample. Electron source design for UED experiments is a challenging problem due to the high-charge density inside the ultrashort electron pulses that are required for these experim

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8

Erasmus, Nicolas. "The development of an electron gun for performing ultrafast electron diffraction experiments." Thesis, Stellenbosch : Stellenbosch University, 2009. http://hdl.handle.net/10019.1/2560.

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Thesis (MSc (Physics))--Stellenbosch University, 2009.<br>ENGLISH ABSTRACT: This thesis aims to comprehensively discuss ultrafast electron di raction and its role in temporally resolving ultrafast dynamics on the molecular level. Theory on electron pulses and electron pulse propagation will be covered, but the main focus will be on the method, equipment and experimental setup required to generate sub-picosecond electron pulses, which are needed to perform time resolved experiments. The design and construction of an electron gun needed to produce the electron pulses will be shown in detai

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9

Kassier, Gunther Horst. "Ultrafast electron diffraction : source development, diffractometer design and pulse characterisation." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5359.

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Thesis (PhD (Physics))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Ultrafast Electron Diffraction (UED) is a rapidly maturing field which allows investigation of the evolution of atomic arrangement in solids on timescales comparable to the vibrational period of their constituent atoms (~10-13 s). The technique is an amalgamation of conventional high energy electron diffraction methods and pump-probe spectroscopy with femtosecond (1 fs = 10-15 s) laser pulses. Ultrafast pulsed electron sources generally suffer from limitations on the attainable electron number per pulse (bright

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10

Lantz, Gabriel. "Ultrafast electron dynamics in Mott materials." Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112014/document.

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Les isolants de Mott sont un exemple parfait de l’impact des corrélations électroniques locales sur les propriétés macroscopiques des matériaux. En variant légèrement le dopage ou la pression, un métal peut se transformer en un isolant. Ces propriétés peuvent être modifiées de manière très rapide en plaçant ces matériaux loin de l'équilibre. Nous avons étudié un prototype de Mott-Hubbard, V2O3 dopé en Cr, en utilisant l'état de l’art des techniques pompe-sonde, à savoir la photoémission résolue en angle, la réflectivité optique, la spectroscopie THz, et la diffraction des rayons X. La réponse

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11

Erasmus, Nicolas. "Ultrafast structural dynamics in 4Hb-TaSe2 observed by femtosecond electron diffraction." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79934.

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Thesis (PhD)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: In this thesis the structural dynamics, upon photo-excitation, of the charge-densitywave (CDW) material 4Hb-TaSe2 is investigated on the time-scale of atomic motion and simultaneously on the spatial-scale of atomic dimensions. CDW materials have been of interest since their discovery in the 1970’s because of their remarkable non-linear and anisotropic electrical properties, gigantic dielectric constants, unusual elastic properties and rich dynamical behaviour. Some of these exotic properties were extensively investigated i

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12

Boshoff, Ilana. "Ultrafast electron diffraction on the charge density wave compound 4Hb-TaSe2." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20062.

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Thesis (MSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Ultrafast electron diffraction is a powerful method to study atomic movement in crystals on sub-picosecond timescales. This thesis consists of three parts. In part one the ultrafast electron diffraction machine is described, followed by improvements that were made and techniques that were developed in order to bring the system to state of the art level and enable the acquisition of suffcient data to obtain information on the structural dynamics in crystals. The second part contains a description of the sample which was stud

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13

Walbran, Matthew Verfasser], and Ferenc [Akademischer Betreuer] [Krausz. "Laser-microwave synchronisation for ultrafast electron diffraction / Matthew Walbran. Betreuer: Ferenc Krausz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1077986963/34.

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14

Walbran, Matthew [Verfasser], and Ferenc [Akademischer Betreuer] Krausz. "Laser-microwave synchronisation for ultrafast electron diffraction / Matthew Walbran. Betreuer: Ferenc Krausz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1077986963/34.

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15

Suleiman, Aminat Oyiza. "Structural dynamics of 1T-TiSe2 using femtosecond electron diffraction." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95990.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: Trilayered transition metal dichalcogenides such as our sample (1T-TiSe2) have been studied for many years as systems with strong electron-electron and electron-phonon correlations. The main attraction to this family of compound is its potential to exhibit ground state phenomena known as charge density waves whose detailed physical origin has been controversially determined. In this study, we have used an ultrafast femtosecond laser based on a pump-probe technique, namely ultrafast electron diffraction, to investigate thes

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16

Kreier, Daniel. "Ultrafast single-electron diffraction at 100 keV and investigation of carbon-nanotube dynamics." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-183901.

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Time-resolved electron diffraction is a powerful tool to observe ultrafast structural dynamics in materials and molecules with atomic spatial as well as temporal resolution. Due to Coulomb repulsion, however, the use of only single-electrons or few-electrons per pulse is inevitable to reach the shortest pulse durations. Electrons have rather high scattering cross sections and thus experiments in transmission require ultrathin samples in the nanometer-range, making sample preparation very challenging. Up to now, ultrafast single-electron diffraction was only demonstrated at an electron energy o

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17

Poulin, Peter Roland. "Design of a photoactivated electron gun for the ultrafast study of chemical reaction dynamics by electron diffraction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0005/MQ40734.pdf.

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18

Kreier, Daniel Verfasser], and Ferenc [Akademischer Betreuer] [Krausz. "Ultrafast single-electron diffraction at 100 keV and investigation of carbon-nanotube dynamics / Daniel Kreier. Betreuer: Ferenc Krausz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1074102509/34.

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19

Gulde, Max Verfasser], Claus [Akademischer Betreuer] Ropers, Tim [Akademischer Betreuer] [Salditt, and Klaus [Akademischer Betreuer] Sokolowski-Tinten. "Development of an ultrafast low-energy electron diffraction setup / Max Gulde. Gutachter: Tim Salditt ; Klaus Sokolowski-Tinten. Betreuer: Claus Ropers." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1063776511/34.

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20

Smit, Albert Bart. "A new femtosecond electron diffractometer for structural dynamics experiments at cryogenic temperatures." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96015.

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Thesis (MSc)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: In this thesis, a femtosecond electron diffraction (FED) set-up that is capable of investigating the photo-induced switching of Cu(DCNQI)2 from being an insulator to being a conductor is presented. Movies of atomic structural changes with temporal resolution within the typical photo-switching transition timescales (sub-picoseconds) are obtainable with this set-up by employing a femtosecond laser. The experimental technique and the design of a crucial instrument of the machine, the electron gun, are extensively described and

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21

Jönsson, Olof. "Ultrafast Structural and Electron Dynamics in Soft Matter Exposed to Intense X-ray Pulses." Doctoral thesis, Uppsala universitet, Molekyl- och kondenserade materiens fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-331936.

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Investigations of soft matter using ultrashort high intensity pulses have been made possible through the advent of X-ray free-electrons lasers. The last decade has seen the development of a new type of protein crystallography where femtosecond dynamics can be studied, and single particle imaging with atomic resolution is on the horizon. The pulses are so intense that any sample quickly turns into a plasma. This thesis studies the ultrafast transition from soft matter to warm dense matter, and the implications for structural determination of proteins. We use non-thermal plasm

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22

Badali, Daniel Salvatore [Verfasser], and R. J. Dwayne [Akademischer Betreuer] Miller. "Structural Dynamics and Atomic Motion in Thin Films Studied by Ultrafast Electron Diffraction and Transient Optical Spectroscopy / Daniel Salvatore Badali ; Betreuer: R. J. Dwayne Miller." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2016. http://d-nb.info/1120015030/34.

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23

Badali, Daniel Salvatore Verfasser], and R. J. Dwayne [Akademischer Betreuer] [Miller. "Structural Dynamics and Atomic Motion in Thin Films Studied by Ultrafast Electron Diffraction and Transient Optical Spectroscopy / Daniel Salvatore Badali ; Betreuer: R. J. Dwayne Miller." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2016. http://nbn-resolving.de/urn:nbn:de:gbv:18-80896.

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24

Vogelgesang, Simon [Verfasser], Claus [Akademischer Betreuer] Ropers, Claus [Gutachter] Ropers, and Stefan [Gutachter] Mathias. "Ultrafast low-energy electron diffraction at surfaces : Probing transitions and phase-ordering of charge-density waves / Simon Vogelgesang ; Gutachter: Claus Ropers, Stefan Mathias ; Betreuer: Claus Ropers." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/117944924X/34.

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25

Caleman, Carl. "Towards Single Molecule Imaging - Understanding Structural Transitions Using Ultrafast X-ray Sources and Computer Simulations." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7915.

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26

Zimmermann, Julian Claudius [Verfasser], Thomas [Akademischer Betreuer] Möller, Daniela [Akademischer Betreuer] Rupp, Thomas [Gutachter] Möller, Daniela [Gutachter] Rupp, and Stefan [Gutachter] Eisebitt. "Probing ultrafast electron dynamics in helium nanodroplets with deep learning assisted diffraction imaging / Julian Claudius Zimmermann ; Gutachter: Thomas Möller, Daniela Rupp, Stefan Eisebitt ; Thomas Möller, Daniela Rupp." Berlin : Technische Universität Berlin, 2021. http://d-nb.info/1232319511/34.

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27

Kassemeyer, Stephan [Verfasser]. "Ultrafast coherent diffractive imaging of nanoparticles using X-ray free-electron laser radiation / Stephan Kassemeyer." Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1053653689/34.

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28

Marino, Andrea. "Ultrafast investigation of electronic and structural dynamics in photomagnetic molecular solids." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S037/document.

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La capacité de photo-commuter les propriétés physico-chimiques des matériaux fonctionnels grâce à des transitions de phase induites par la lumière, ouvre des perspectives fascinantes pour diriger un matériau vers un nouvel état hors équilibre thermique. Cependant, il est fondamental de comprendre tous les phénomènes élémentaires, habituellement cachés dans une moyenne statistique lors des transformations à l'équilibre. Les études résolues en temps représentent une approche unique pour accéder à l'évolution des différents degrés de liberté du système et connaître les processus élémentaires mis

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Bowlan, Pamela. "Measuring the spatiotemporal electric." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28188.

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Thesis (M. S.)--Physics, Georgia Institute of Technology, 2009.<br>Committee Chair: Rick Trebino; Committee Member: Jennifer Curtis; Committee Member: John Buck; Committee Member: Mike Chapman; Committee Member: Stephen Ralph.

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30

Storeck, Gero [Verfasser], Claus [Akademischer Betreuer] Ropers, Claus [Gutachter] Ropers, and Stefan [Gutachter] Mathias. "Non-equilibrium structural Dynamics of incommensurate Charge-Density Waves : Diffractive Probing with a micron-scale ultrafast Electron Gun / Gero Storeck ; Gutachter: Claus Ropers, Stefan Mathias ; Betreuer: Claus Ropers." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1213096286/34.

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31

Simancas, Coloma Jorge. "Synthesis and Characterization of Zeolitic Materials Using Phosphorous Organic Structure Directing Agents." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/171267.

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[ES] Las zeolitas son materiales cristalinos microporosos con canales y tamaños de poro de dimensiones moleculares. La estructura y composición de las zeolitas les confiere interesantes propiedades que permiten su aplicación en una amplia gama de aplicaciones industriales como adsorción, separación o catálisis. La síntesis de zeolitas es la etapa más importante para el control de la estructura y composición de las zeolitas y, por tanto, crítica para la optimización de sus propiedades. Esta tesis se ha centrado en la síntesis de zeolitas utilizando compuestos que contienen fósforo (cationes fo

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32

Stingl, Johannes. "Untersuchung der ultraschnellen Polarisationsdynamik in Lithiumborhydrid mittels Femtosekunden Röntgenbeugung." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16847.

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In dieser Arbeit wird die ultraschnelle elektronische Polarisation in dem kristallinen Festkörper Lithiumborhydrid (LiBH4) untersucht. Das Material wird dabei mit einem femtosekundenlangen optischen Impuls angeregt und mit einem ebenso kurzen Röntgenimpuls abgetastet. Mithilfe der Röntgenbeugung kann die optisch induzierte räumliche Neuordnung elektronischer Ladung direkt mit atomarer räumlicher Auflösung abgebildet werden. Kupfer K-alpha Röntgenstrahlung für das Experiment wird im Labor aus einer Laser-Plasmaquelle mit 1 kHz Wiederholrate erzeugt. Diese Strahlung wird dann auf eine pulveri

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33

Ihee, Hyotcherl. "Ultrafast Electron Diffraction." Thesis, 2001. https://thesis.library.caltech.edu/1292/1/Ihee_h_2001.pdf.

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<p>Molecular dynamics is now routinely studied on femtosecond time scales using various spectroscopies. However, direct structural information of all nuclear coordinates involved in such dynamical processes requires resolution in time by x-ray or electron diffraction. The focus of this laboratory has been the development of ultrafast electron diffraction (UED) for recording structures in motion, which exploits the six-orders-of-magnitude higher scattering cross section of electrons compared with x-rays. Conventional electron diffraction has been developed over the last several decades to becom

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34

Michalik, Anna Maria. "Theory of Ultrafast Electron Diffraction." Thesis, 2009. http://hdl.handle.net/1807/17475.

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Ultrafast electron diffraction (UED) is a method of directly imaging system dynamics at the atomic scale with picosecond time resolution. In this thesis I present theoretical analyses of the experimental processes, and construct models in order to better understand UED experiments and to guide future refinements. In particular, I derive a model of electron bunch propagation and a model of electron bunch diffraction, where both models take into account all bunch parameters. To analyse the propagation of electron bunches, I present a mean-field analytic Gaussian (AG) model. I derive a system of

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35

Vogelgesang, Simon. "Ultrafast low-energy electron diffraction at surfaces." Doctoral thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E5A1-F.

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36

Dwyer, Jason Rodger. "Femtosecond electron diffraction studies of ultrafast structural dynamics." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=370902&T=F.

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Gulde, Max. "Development of an ultrafast low-energy electron diffraction setup." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-9959-5.

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38

Feenstra, Jonathan Stuart. "Ultrafast Electron Diffraction: Direct Determination of Structural Dynamics of Molecular Excited States." Thesis, 2006. https://thesis.library.caltech.edu/1978/16/15Appendix1_v04.pdf.

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<p>Ultrafast electron diffraction (UED) has been applied to determine the structures of isolated molecules and the dynamics of their excited states. Preceding the experimental accounts is a detailed discussion of the theoretical methodology behind UED in the Caltech labs. The procedure is explained by which electron scattering signal is measured and processed to allow the direct determination of structural dynamics (the signature feature of this experiment). The apparatus itself is also broken down into its component parts and discussed.</p> <p>UED has the capability of studying both ground

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Rajkovic, Ivan [Verfasser]. "Ultrafast electron diffraction studies of optically excited thin bismuth films / von Ivan Rajkovic." 2008. http://d-nb.info/991030443/34.

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Park, Hyuk Cao Jianming. "The development of femtosecond electron diffraction for direct measurements of ultrafast atomic motions." Diss., 2006. http://etd.lib.fsu.edu/theses/available/etd-12132005-134923.

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Thesis (Ph. D.)--Florida State University, 2006.<br>Advisor: Jianming Cao, Florida State University, College of Arts and Sciences, Dept. of Physics. Title and description from dissertation home page (viewed June 8, 2006). Document formatted into pages; contains xiii, 111 pages. Includes bibliographical references.

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Srinivasan, Ramesh. "Structural Dynamics of Complex Molecules by Ultrafast Electron Diffraction : Concepts, Methodology and Applications." Thesis, 2005. https://thesis.library.caltech.edu/1749/1/00_TOC.pdf.

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The central theme in ultrafast electron diffraction (UED) is the elucidation of the structural dynamics of transient molecular entities. With properly timed sequences of ultrafast electron pulses, it is now possible to image complex molecular structures in the four dimensions of space and time with resolutions approaching 0.01 [angstroms] and 1 ps, respectively. Reaching this spatiotemporal resolution on the atomic scale has been the driving force behind the development and application of the third generation UED instrument–-the subject of this dissertation. The current state-of-the-art in res

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Gahlmann, Andreas. "Ultrafast Electron Diffraction: Pulsed Laser Desorption Enables Time-Resolved Structural Determination of Thermally Labile Chromophores." Thesis, 2011. https://thesis.library.caltech.edu/6278/7/ueda.zip.

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<p>The construction and utilization of the fourth-generation ultrafast electron diffraction apparatus, UED4, is the subject of this thesis. With UED4 and its novel and universal sample delivery method based on laser desorption, we were able to vaporize thermally labile molecular samples and determine their ground-state structures and the structures of their photochemical and photophysical reaction products. Each component part of the new UED4 apparatus is described, and the experimental and computational procedures used to extract structural information from the time-resolved diffraction pat

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"Ultrafast Electrons and X-rays as Probe of Biomolecular Dynamics." Doctoral diss., 2016. http://hdl.handle.net/2286/R.I.40825.

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abstract: The structure-function relation in Biology suggests that every biological molecule has evolved its structure to carry out a specific function. However, for many of these processes (such as those with catalytic activity) the structure of the biomolecule changes during the course of a reaction. Understanding the structure-function relation thus becomes a question of understanding biomolecular dynamics that span a variety of timescales (from electronic rearrangements in the femtoseconds to side-chain alteration in the microseconds and more). This dissertation deals with the study of bio

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Kelloway, Donald. "Searching for Spin Crossover in Fe(bpy)3(PF6)2 using Femtosecond Electron Diffraction and Ultrafast Transient Absorption." Thesis, 2014. http://hdl.handle.net/1807/44032.

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Femtosecond electron diffraction experiments were performed on solid state iron(II) tris(2,2'-bipyridine) bis(hexafluorophosphate). The cation is known to undergo a spin crossover process when solvated in water and irradiated with 400 nm coherent light which results in a transition from a low spin to high spin state within a picosecond which is accompanied by a uniform 0.2 Å Fe-N bond elongation. A femtosecond diffraction experiment was performed on the solid sample and was unable to find evidence of a fast spin crossover transition. Suspecting this may be due to limitations of the apparatus,

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45

Feist, Armin. "Next-Generation Ultrafast Transmission Electron Microscopy – Development and Applications." Thesis, 2018. http://hdl.handle.net/11858/00-1735-0000-002E-E48B-B.

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"Prebunching for an Inverse Compton Scattering Source via an Emittance Exchange." Doctoral diss., 2020. http://hdl.handle.net/2286/R.I.62749.

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abstract: X-ray free electron lasers (XFELs) provide several orders of magnitude brighter x-rays than 3rd generation sources. However, the electron beamlines and undulator magnets required are on the scale of kilometers, costing billions of dollars with only a half dozen or so currently operating worldwide. One way to overcome these limitations is to prebunch the electron beam on the scale of the x-ray wavelength. In this paper one such scheme is discussed, which uses a nanopatterned grating called a dynamical beam stop. This uses diffraction from crystal planes of the etched portion of a grat

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Storeck, Gero. "Non-equilibrium structural Dynamics of incommensurate Charge-Density Waves." Doctoral thesis, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-13F4-2.

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