Download or read book Photonic Crystal Laser driven Accelerator Structures written by Benjamin M. Cowan and published by . This book was released on 2007 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Photonic Crystal Laser Driven Accelerator Structures written by B. Cowan and published by . This book was released on 2005 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss simulated photonic crystal structure designs for laser-driven particle acceleration, focusing on three-dimensional planar structures based on the so-called ''woodpile'' lattice. We demonstrate guiding of a speed-of-light accelerating mode by a defect in the photonic crystal lattice and discuss the properties of this mode. We also discuss particle beam dynamics in the structure, presenting a novel method for focusing the beam. In addition we describe some potential coupling methods for the structure.
Download or read book Photonic Crystal Laser Driven Accelerator Structures written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser-driven acceleration holds great promise for significantly improving accelerating gradient. However, scaling the conventional process of structure-based acceleration in vacuum down to optical wavelengths requires a substantially different kind of structure. We require an optical waveguide that (1) is constructed out of dielectric materials, (2) has transverse size on the order of a wavelength, and (3) supports a mode with speed-of-light phase velocity in vacuum. Photonic crystals--structures whose electromagnetic properties are spatially periodic--can meet these requirements. We discuss simulated photonic crystal accelerator structures and describe their properties. We begin with a class of two-dimensional structures which serves to illustrate the design considerations and trade-offs involved. We then present a three-dimensional structure, and describe its performance in terms of accelerating gradient and efficiency. We discuss particle beam dynamics in this structure, demonstrating a method for keeping a beam confined to the waveguide. We also discuss material and fabrication considerations. Since accelerating gradient is limited by optical damage to the structure, the damage threshold of the dielectric is a critical parameter. We experimentally measure the damage threshold of silicon for picosecond pulses in the infrared, and determine that our structure is capable of sustaining an accelerating gradient of 300 MV/m at 1550 nm. Finally, we discuss possibilities for manufacturing these structures using common microfabrication techniques.
Download or read book Three Dimensional Photonic Crystal Laser Driven Accelerator Structures written by B. Cowan and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss simulated photonic crystal structure designs for laser-driven particle acceleration, focusing on three-dimensional planar structures based on the so-called ''woodpile'' lattice. We describe guiding of a speed-of-light accelerating mode by a defect in the photonic crystal lattice and discuss the properties of this mode, including particle beam dynamics and potential coupling methods for the structure. We also discuss possible materials and power sources for this structure and their effects on performance parameters, as well as possible manufacturing techniques and the required tolerances. In addition we describe the computational technique and possible improvements in numerical modeling that would aid development of photonic crystal structures.
Download or read book Compact Couplers for Photonic Crystal Laser Driven Accelerator Structures written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonic crystal waveguides are promising candidates for laser-driven accelerator structures because of their ability to confine a speed-of-light mode in an all-dielectric structure. Because of the difference between the group velocity of the waveguide mode and the particle bunch velocity, fields must be coupled into the accelerating waveguide at frequent intervals. Therefore efficient, compact couplers are critical to overall accelerator efficiency. We present designs and simulations of high-efficiency coupling to the accelerating mode in a three-dimensional photonic crystal waveguide from a waveguide adjoining it at 90{sup o}. We discuss details of the computation and the resulting transmission. We include some background on the accelerator structure and photonic crystal-based optical acceleration in general.
Download or read book Photonic Crystal Laser Accelerator Structures written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonic crystals have great potential for use as laser-driven accelerator structures. A photonic crystal is a dielectric structure arranged in a periodic geometry. Like a crystalline solid with its electronic band structure, the modes of a photonic crystal lie in a set of allowed photonic bands. Similarly, it is possible for a photonic crystal to exhibit one or more photonic band gaps, with frequencies in the gap unable to propagate in the crystal. Thus photonic crystals can confine an optical mode in an all-dielectric structure, eliminating the need for metals and their characteristic losses at optical frequencies. We discuss several geometries of photonic crystal accelerator structures. Photonic crystal fibers (PCFs) are optical fibers which can confine a speed-of-light optical mode in vacuum. Planar structures, both two- and three-dimensional, can also confine such a mode, and have the additional advantage that they can be manufactured using common microfabrication techniques such as those used for integrated circuits. This allows for a variety of possible materials, so that dielectrics with desirable optical and radiation-hardness properties can be chosen. We discuss examples of simulated photonic crystal structures to demonstrate the scaling laws and trade-offs involved, and touch on potential fabrication processes.
Download or read book Photonic Crystal and Its Applications for Next Generation Systems written by Shanmuga Sundar Dhanabalan and published by Springer Nature. This book was released on 2023-07-07 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the advanced fabrication techniques, challenges, and applications of photonic crystals for next-generation systems in various applications such as high-speed networks, photonic integrated circuits, health care, sensors, energy, and environmental. This book highlights the literature and works put forward by various scientists, researchers, and academicians in photonic crystals and their real-time applications. The content of the book appeals to readers such as students, researchers, and industrial engineers who are working in the design and development of photonics-based concepts, components, and devices for various applications.
Download or read book Applications of Laser Driven Particle Acceleration written by Paul Bolton and published by CRC Press. This book was released on 2018-06-04 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book of its kind to highlight the unique capabilities of laser-driven acceleration and its diverse potential, Applications of Laser-Driven Particle Acceleration presents the basic understanding of acceleration concepts and envisioned prospects for selected applications. As the main focus, this new book explores exciting and diverse application possibilities, with emphasis on those uniquely enabled by the laser driver that can also be meaningful and realistic for potential users. It also emphasises distinction, in the accelerator context, between laser-driven accelerated particle sources and the integrated laser-driven particle accelerator system (all-optical and hybrid versions). A key aim of the book is to inform multiple, interdisciplinary research communities of the new possibilities available and to inspire them to engage with laser-driven acceleration, further motivating and advancing this developing field. Material is presented in a thorough yet accessible manner, making it a valuable reference text for general scientific and engineering researchers who are not necessarily subject matter experts. Applications of Laser-Driven Particle Acceleration is edited by Professors Paul R. Bolton, Katia Parodi, and Jörg Schreiber from the Department of Medical Physics at the Ludwig-Maximilians-Universität München in München, Germany. Features: Reviews the current understanding and state-of-the-art capabilities of laser-driven particle acceleration and associated energetic photon and neutron generation Presents the intrinsically unique features of laser-driven acceleration and particle bunch yields Edited by internationally renowned researchers, with chapter contributions from global experts
Download or read book Advanced Accelerator Concepts written by Vitaly Yakimenko and published by American Institute of Physics. This book was released on 2004-12-14 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings cover new developments for a number of the most advanced methods for acceleration of heavy ions, protons, electrons and positrons.
Download or read book Advanced Accelerator Concepts written by Christopher E. Clayton and published by American Inst. of Physics. This book was released on 2002-12-06 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 10th Workshop on Advanced Accelerator Concepts reviews the current progress in the rapidly growing field of advanced accelerators. This series of DOE-sponsored workshops attracts researchers who invent and explore the physics and technologies needed to generate, accelerate, and manipulate particles with plasmas, laser and particle beams, as well as RF and mm-waves. Applications include advanced radiation sources and high energy physics.
Download or read book Attosecond Nanophysics written by Peter Hommelhoff and published by John Wiley & Sons. This book was released on 2015-03-09 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die Autoren geben einen tiefen wie auch umfassenden Überblick über die aktuelle Forschung im Bereich der Attosekunden-Nanophysik, d.h. einem Gebiet der nanoskaligen Festkörpersysteme und der natürlichen Zeitskala von Elektronenbewegungen.
Download or read book High Resolution Manufacturing from 2D to 3D 4D Printing written by Simone Luigi Marasso and published by Springer Nature. This book was released on 2022-10-14 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive presentation of the most frequently used high resolution manufacturing techniques available, as well as the polymeric materials used for each of the techniques. Divided into two parts covering the technologies and materials used and the impact on different research fields and case studies, High Resolution Manufacturing from 2D to 3D/4D Printing: Applications in Engineering and Medicine addresses issues like throughput improvement by volumetric 3D printing and presenting novel applications and case studies. In addition, this book also covers the latest breakthrough developments and innovations to help readers understand the future applications of this technology across various disciplines, including biomedicine, electronics, energy, and photonics.
Download or read book Hollow Core Photonic Band Gap Fibers for Particle Acceleration written by and published by . This book was released on 2011 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonic band gap (PBG) dielectric fibers with hollow cores are being studied both theoretically and experimentally for use as laser driven accelerator structures. The hollow core functions as both a longitudinal waveguide for the transverse-magnetic (TM) accelerating fields and a channel for the charged particles. The dielectric surrounding the core is permeated by a periodic array of smaller holes to confine the mode, forming a photonic crystal fiber in which modes exist in frequency pass-bands, separated by band gaps. The hollow core acts as a defect which breaks the crystal symmetry, and so-called defect, or trapped modes having frequencies in the band gap will only propagate near the defect. We describe the design of 2-D hollow-core PBG fibers to support TM defect modes with high longitudinal fields and high characteristic impedance. Using as-built dimensions of industrially-made fibers, we perform a simulation analysis of the first prototype PBG fibers specifically designed to support speed-of-light TM modes.
Download or read book Beam Wave Interaction in Periodic and Quasi Periodic Structures written by Levi Schächter and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main theme of this book is the interaction of electrons with electromagnetic waves in the presence of periodic and quasi-periodic structures in vacuum, in view of applications in the design and operation of particle accelerators. The first part of the book is concerned with the textbook-like presentation of the basic material, in particular reviewing elementary electromagnetic phenomena and electron dynamics. The second part of the book describes the current models for beam-wave interactions with periodic and quasi-periodic structures. This is the basis for introducing, in the last part of the book, a number of particle and radiation sources that rest on these principles, in particular the free-electron laser, wake-field acceleration schemes and a number of other advanced particle accelerator concepts. This second edition brings this fundamental text up-to-date in view of the enormous advances that have been made over the last decade since the first edition was published. All chapters, as well as the bibliography, have been significantly revised and extended, and the number of end-of-chapter exercises has been further increased to enhance this book’s usefulness for teaching specialized graduate courses.
Download or read book Particle Accelerator on a Chip Fabrication and Characterization of a Three dimensional Photonic Crystal Accelerator written by Christopher McGuinness and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Charged particles are currently accelerated by microwave radiation generated in large klystrons. This is very reminiscent of vacuum tube diodes on which early computers relied. Can particle accelerator technology follow the shift that drove the semiconductor industry from vacuum tubes to solid state devices? Can particle accelerators benefit from the high energy density provided by lasers at optical and infrared wavelengths? Can dielectric materials replace the metallic waveguides allowing us to utilize the high peak powers available in lasers today? In making this jump from microwave to infrared wavelengths, a decrease of 10,000 times in wavelength, entirely new fabrication technologies are needed. And entirely new physics must be applied in transitioning from metals to dielectrics. This thesis focuses on the fabrication and characterization of a three-dimensional photonic crystal designed for accelerating electrons. We present the design for a woodpile structure with a waveguide or defect that supports an accelerating mode. This mode has a speed-of-light phase velocity and longitudinal electric field. It has an estimated accelerating gradient of 351 MV/m. The 17 layer woodpile structure was fabricated at the Stanford Nanofabrication facility using semiconductor processing techniques. The structure was fabricated in a layer-by-layer approach resulting in two half-structures which were then aligned and bonded together. Three versions of structures were fabricated with operating wavelengths of 3.45, 3.95, and 4.94 [micrometers]. Optical characterization of these structures was performed using Fourier transform infrared spectroscopy. Simulations show good agreement with the measurements when the structure parameters are modeled appropriately. Finally, an optical parametric oscillator was built for studying the defect modes in the structure.
Download or read book Optical Accelerator written by R. H. Siemann and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Indications that solid-state lasers will reach wall-plug to light efficiencies of 30% or more make a laser-driven vacuum-accelerator increasingly appealing. Since at the wavelength of relevant lasers, dielectrics may sustain significantly higher electric field and transmit power with reduced loss comparing to metals, the basic assumption is that laser accelerator structures will be dielectrics. For structures that have typical dimensions of a few microns, present manufacturing constraints entail planar structures that in turn, require re-evaluation of many of the scaling laws that were developed for azimuthally symmetric structures. Moreover, structures that operate at a wavelength of a few centimeters are machined today with an accuracy of microns. In future it will not be possible to maintain 4-5 orders of magnitude difference between operating wavelength and achievable tolerance. An additional difference is, that contrary to present accelerators where the number of electrons in a micro-bunch is of the order of a 10{sup 10}, in an optical structure this number drops to a few thousands. Consequently, the relative impact of individual electrons may be significantly larger. Acceleration structures with higher degree of symmetry, similar to optical fibers, have also some inherent advantages however thermal gradients as well as heat dissipation may become critical impediments. The impact of all these factors on the performance of a laser accelerator structure needs to be determined. Efficiency, wakes and emittance scaling laws that have been developed recently will be presented. It will be shown that there are some inherent advantages in combining the accelerator structure and the laser cavity in one system.
Download or read book Proposed Few optical Cycle Laser driven ParticleAccelerator Structure written by and published by . This book was released on 2006 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: We describe a transparent dielectric grating accelerator structure that is designed for ultra-short laser pulse operation. The structure is based on the principle of periodic field reversal to achieve phase synchronicity for relativistic particles, however to preserve ultra-short pulse operation it does not resonate the laser field in the vacuum channel. The geometry of the structure appears well suited for application with high average power lasers and high thermal loading. Finally, it shows potential for an unloaded gradient of 10 GeV/m with 10 fsec laser pulses and the possibility to accelerate 106 electrons per bunch at an efficiency of 8%. The fabrication procedure and a proposed near term experiment with this accelerator structure are presented.
