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Electron Beam Manipulations At The Angstrom Level And Attosecond Timescale For X Ray Fels
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Book Synopsis Electron Beam Manipulations at the Angstrom Level and Attosecond Timescale for X-ray FELs by : James Paton MacArthur
Download or read book Electron Beam Manipulations at the Angstrom Level and Attosecond Timescale for X-ray FELs written by James Paton MacArthur and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray Free-Electron Lasers (FELs) like the Linac Coherent Light Source (LCLS) have now operated for a decade, delivering linearly polarized pulses as short as a few femtoseconds to users. I will discuss two experiments and associated theoretical developments on manipulating the FEL gain medium -- a relativistic electron beam -- in order to extend the capabilities of LCLS. The first is the production of isolated, circularly polarized x-ray pulses with a helical undulator and non-intuitive electron microbunch rotation. The microbunch rotation required for isolating circular pulses is also useful to multiplex LCLS and for outcoupling radiation from cavity-based FELs. The second project is on the production of sub-femtosecond x-ray pulses with a tailored electron beam phase space. We tailor the longitudinal phase space of the electron beam core with coherent radiation from the electron beam tail produced in a magnetic undulator. The resultant x-ray pulses contain six orders of magnitude more energy than otherwise comparable sub-femtosecond x-ray sources. These two projects involved relativistic electron beams interacting with radiation in previously unexplored parameter regimes. We therefore also discuss several theoretical contributions and associated simulation work. In particular, we present an improved understanding of coherent radiation from a kicked electron beam, undulator impedance, reverse tapered undulators, and rest-frame simulation of FELs.
Book Synopsis Attosecond and Femtosecond Beam Shaping for Nonlinear X-ray Spectroscopy with X-ray Free-electron Laser by : Zhaoheng Guo
Download or read book Attosecond and Femtosecond Beam Shaping for Nonlinear X-ray Spectroscopy with X-ray Free-electron Laser written by Zhaoheng Guo and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray Free-Electron Lasers (XFELs) are the brightest source of X-ray radiation with sufficient intensity to perform nonlinear X-ray spectroscopy, such as pump-probe experiments. By extending the nonlinear soft X-ray pump-probe techniques to few-femtosecond and attosecond timescales, we can probe the motion of valence electrons in molecular systems on their natural time scale. In this thesis, I will discuss two projects that use advanced electron beam shaping techniques to generate attosecond soft X-ray FEL pulse pairs and high-intensity few-femtosecond pulses at the Linac Coherent Light Source (LCLS). In the first project, we demonstrated the generation and control of two-color soft X-ray FEL pulse pairs with attosecond-scale durations and timing stability. We employed angular streaking to measure the time delay between pump/probe pulses. These gigawatt-level attosecond soft X-ray FEL pump/probe pulse pairs have been applied to directly time-resolve the charge migration in molecules. In the second project, we used the wakefield of a corrugated structure called a dechirper to produce a nondestructive transverse kick in the electron beam and selectively radiated different slices of the electron beam in multiple stages, enabling the generation of few-femtosecond soft X-ray FEL pulses with peak power of hundreds of gigawatts.
Book Synopsis The Quest for Ultra-Short X-Ray Pulses by :
Download or read book The Quest for Ultra-Short X-Ray Pulses written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical bonds form, change, or break on a femtosecond timescale. Recording a 'molecular movie' with an atomic-scale spatial resolution at the timescale set by atomic motion is a critical step in understanding these processes that can be accomplished by using ultra-short x-ray pulses. In the first part of this talk I will discuss several ideas for a generation of femtosecond x-ray pulses using spontaneous emission of electrons. Some of them, like the laser 'slicing' technique, are now routinely used at several storage-ring-based synchrotron light sources; others, like an rf orbit deflection technique, is under construction at the Advanced Photon Source. Nowadays, the femtosecond x-ray pulses are also routinely produced by x-ray free electron lasers (FELs). In the second part of this talk I will discuss how one can use FELs to obtain even shorter x-ray pulses down to attosecond timescale.
Book Synopsis Generation of Attosecond X-ray Pulses Beyond the Atomic Unit of Time Using Laser Induced Microbunching in Electron Beams by :
Download or read book Generation of Attosecond X-ray Pulses Beyond the Atomic Unit of Time Using Laser Induced Microbunching in Electron Beams written by and published by . This book was released on 2009 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the discovery of mode-locking, efforts have been devoted to reducing the duration of laser pulses since the ultrashort pulses are critical to explore the dynamics occurred on a ever-shorter timescale. In this paper we describe a scheme that's capable of generating intense attosecond x-ray pulses with duration beyond the atomic unit of time ((almost equal to)24 attoseconds). The scheme combines the echo-enabled harmonic generation technique with the bunch compression which allows one to generate harmonic numbers of a few hundred in a microbunched beam through up-conversion of the frequency of a UV seed laser. A few-cycle intense IR laser is used to generate the required energy chirp in the beam for bunch compression and for selection of an attosecond x-ray pulse. Using a representative realistic set of parameters, we show that 1 nm x-ray pulse with peak power of a few hundred MW and duration as short as 20 attoseconds (FWHM) can be generated from a 200 nm UV seed laser. The proposed scheme may enable the study of electronic dynamics with a resolution beyond the atomic unit of time and may open a new regime of ultrafast sciences.
Book Synopsis Breaking the Attosecond, Angstrom and TV/M Field Barriers with Ultra-Fast Electron Beams by :
Download or read book Breaking the Attosecond, Angstrom and TV/M Field Barriers with Ultra-Fast Electron Beams written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent initiatives at UCLA concerning ultra-short, GeV electron beam generation have been aimed at achieving sub-fs pulses capable of driving X-ray free-electron lasers (FELs) in single-spike mode. This use of very low Q beams may allow existing FEL injectors to produce few-100 attosecond pulses, with very high brightness. Towards this end, recent experiments at the LCLS have produced ≈2 fs, 20 pC electron pulses. We discuss here extensions of this work, in which we seek to exploit the beam brightness in FELs, in tandem with new developments in cryogenic undulator technology, to create compact accelerator-undulator systems that can lase below 0.15 Å, or be used to permit 1.5 Å operation at 4.5 GeV. In addition, we are now developing experiments which use the present LCLS fs pulses to excite plasma wakefields exceeding 1 TV/m, permitting a table-top TeV accelerator for frontier high energy physics applications.
Book Synopsis A New Technique to Generate 100 GW-level Attosecond X-ray Pulses from the X-ray SASE FELs by : Evgenij L. Saldin
Download or read book A New Technique to Generate 100 GW-level Attosecond X-ray Pulses from the X-ray SASE FELs written by Evgenij L. Saldin and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Online Diagnostics of Time-resolved Electron Beam Parameters with Femtosecond Resolution for X-ray FELs by : Minjie Yan
Download or read book Online Diagnostics of Time-resolved Electron Beam Parameters with Femtosecond Resolution for X-ray FELs written by Minjie Yan and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron Beam-based Sources of Ultrashort X-ray Pulses by :
Download or read book Electron Beam-based Sources of Ultrashort X-ray Pulses written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of various methods for generation of ultrashort x-ray pulses using relativistic electron beam from conventional accelerators is presented. Both spontaneous and coherent emission of electrons is considered. The importance of the time-resolved studies of matter at picosecond (ps), femtosecond (fs), and atttosecond (as) time scales using x-rays has been widely recognized including by award of a Nobel Prize in 1999 [Zewa]. Extensive reviews of scientific drivers can be found in [BES1, BES2, BES3, Lawr, Whit]. Several laser-based techniques have been used to generate ultrashort x-ray pulses including laser-driven plasmas [Murn, Alte, Risc, Rose, Zamp], high-order harmonic generation [Schn, Rund, Wang, Arpi], and laser-driven anode sources [Ande]. In addition, ultrafast streak-camera detectors have been applied at synchrotron sources to achieve temporal resolution on the picosecond time scale [Wulf, Lind1]. In this paper, we focus on a different group of techniques that are based on the use of the relativistic electron beam produced in conventional accelerators. In the first part we review several techniques that utilize spontaneous emission of electrons and show how solitary sub-ps x-ray pulses can be obtained at existing storage ring based synchrotron light sources and linacs. In the second part we consider coherent emission of electrons in the free-electron lasers (FELs) and review several techniques for a generation of solitary sub-fs x-ray pulses. Remarkably, the x-ray pulses that can be obtained with the FELs are not only significantly shorter than the ones considered in Part 1, but also carry more photons per pulse by many orders of magnitude.
Book Synopsis Online Diagnostics of Time-resolved Electron Beam Properties with Femtosecond Resolution for X-ray FELs by : M. Yan
Download or read book Online Diagnostics of Time-resolved Electron Beam Properties with Femtosecond Resolution for X-ray FELs written by M. Yan and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Attosecond Light and Science at the Time-scale of the Electron - Coherent X-Rays from Tabletop Ultrafast Lasers by :
Download or read book Attosecond Light and Science at the Time-scale of the Electron - Coherent X-Rays from Tabletop Ultrafast Lasers written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Ever since the invention of the laser 50 years ago and its application in nonlinear optics, scientists have been striving to extend coherent laser beams into the x-ray region of the spectrum. Very recently however, the prospects for tabletop coherent sources at very short wavelengths, even in the hard x-ray region of the spectrum at wavelengths
Book Synopsis Physics of and Science with X-Ray Free-Electron Lasers by : J. Hastings
Download or read book Physics of and Science with X-Ray Free-Electron Lasers written by J. Hastings and published by IOS Press. This book was released on 2020-12-18 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many X-Ray Free-Electron Lasers (X-FELs) have been designed, built and commissioned since the first lasing of the Linac Coherent Light Source in the hard and soft X-ray regions, and great progress has been made in improving their performance and extending their capabilities. Meanwhile, experimental techniques to exploit the unique properties of X-FELs to explore atomic and molecular systems of interest to physics, chemistry, biology and the material sciences have also been developed. As a result, our knowledge of atomic and molecular science has been greatly extended. Nevertheless, there is still much to be accomplished, and the potential for discovery with X-FELs is still largely unexplored. The next generation of scientists will need to be well versed in both particle beams/FEL physics and X-ray photon science. This book presents material from the Enrico Fermi summer school: Physics of and Science with X-Ray Free-Electron Lasers, held at the Enrico Fermi International School of Physics in Varenna, Italy, from 26 June - 1 July 2017. The lectures presented at the school were aimed at introducing graduate students and young scientists to this fast growing and exciting scientific area, and subjects covered include basic accelerator and FEL physics, as well as an introduction to the main research topics in X-FEL-based biology, atomic molecular optical science, material sciences, high-energy density physics and chemistry. Bridging the gap between accelerator/FEL physicists and scientists from other disciplines, the book will be of interest to all those working in the field.
Book Synopsis Beam Acceleration In Crystals And Nanostructures - Proceedings Of The Workshop by : Gerard Mourou
Download or read book Beam Acceleration In Crystals And Nanostructures - Proceedings Of The Workshop written by Gerard Mourou and published by . This book was released on 2020 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physics of Free Electron Lasers by : E.L. Saldin
Download or read book The Physics of Free Electron Lasers written by E.L. Saldin and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Free Electron Laser (FEL) will be a crucial tool for research and industrial applications. This book describes the physical fundamentals of FELs on the basis of classical mechanics, electrodynamics, and the kinetic theory of charged particle beams, and will be suitable for graduate students and scientists alike. After a short introduction, the book discusses the theory of the FEL amplifier and oscillator, diffraction effects in the amplifier, and waveguide FEL.
Download or read book Attosecond Physics written by Luis Plaja and published by Springer. This book was released on 2013-07-31 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Attophysics is an emerging field in physics devoted to the study and characterization of matter dynamics in the sub-femtosecond time scale. This book gives coverage of a broad set of selected topics in this field, exciting by their novelty and their potential impact. The book is written review-like. It also includes fundamental chapters as introduction to the field for non-specialist physicists. The book is structured in four sections: basics, attosecond pulse technology, applications to measurements and control of physical processes and future perspectives. It is a valuable reference tool for researchers in the field as well as a concise introduction to non-specialist readers.
Book Synopsis The Realization of Star Trek Technologies by : Mark E. Lasbury
Download or read book The Realization of Star Trek Technologies written by Mark E. Lasbury and published by Springer. This book was released on 2016-08-24 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: As Star Trek celebrates its 50th anniversary, the futuristic tools of Kirk, Spock, Scott, and McCoy continue to come to life. This book merges Star Trek scientific lore—how the science of the time informed the implementation of technology in the series—and the science as it is playing out today. Scientists and engineers have made and continue to develop replicators, teletransporters, tractor beams, and vision restoring visors. This book combines the vision of 1966 science fiction with the latest research in physics, biotechnology, and engineering.
Download or read book Radiation in Bioanalysis written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the state of the art across the broad range of spectroscopic techniques used in the study of biological systems. It reviews some of the latest advances achieved in the application of these techniques in the analysis and characterization of small and large biological compounds, covering topics such as VUV/UV and UV-visible spectroscopies, fluorescence spectroscopy, IR and Raman techniques, dynamic light scattering (DLS), circular dichroism (CD/SR-CD), pulsed electron paramagnetic resonance techniques, Mössbauer spectroscopy, nuclear magnetic resonance, X-ray methods and electron and ion impact spectroscopies. The second part of the book focuses on modelling methods and illustrates how these tools have been used and integrated with other experimental and theoretical techniques including also electron transfer processes and fast kinetics methods. The book will benefit students, researchers and professionals working with these techniques to understand the fundamental mechanisms of biological systems.
Download or read book Magnetism written by Joachim Stöhr and published by Springer Science & Business Media. This book was released on 2007-01-19 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text book gives a comprehensive account of magnetism, one of the oldest yet most vibrant fields of physics. It spans the historical development, the physical foundations and the continuing research underlying the subject. The book covers both the classical and quantum mechanical aspects of magnetism and novel experimental techniques. Perhaps uniquely, it discusses spin transport and magnetization dynamics phenomena associated with atomically and spin engineered nano-structures against the backdrop of spintronics and magnetic storage and memory applications. The book is for students, and serves as a reference for scientists in academia and research laboratories.
