Theory of edge radiation. Part II: Advanced applications

Geloni, Gianluca; Kocharyan, Vitali; Saldin, Evgeni; Schneidmiller, Evgeni; Yurkov, M.V.

doi:10.1016/j.nima.2009.04.039

Cited by 14 publications

(8 citation statements)

References 21 publications

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“…In Sec. 3, we find the spectrum domain where the edge radiation dominates and show that the edge radiation is a universal infrared asymptotics of any radiation of charged particles in a vacuum, the effects of a chamber [16,17,57] where the process is evolving being supposed to be negligible. Section 4 is devoted to the edge radiation of twisted photons.…”

Section: Introductionmentioning

confidence: 76%

Probability of radiation of twisted photons in the infrared domain

2019

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The infrared asymptotics of probability of radiation of twisted photons in an arbitrary scattering process of quantum electrodynamics (QED) in a vacuum is investigated. This asymptotics is universal and corresponds to the radiation produced by a classical current. Such a radiation is known as the edge radiation. We represent it in terms of the twisted photons: the exact analytical formulas for the average number of radiated twisted photons are derived. We find the average projection of the total angular momentum of the edge radiation and the angular momentum per photon. It is shown that the edge radiation can be used as a source of twisted photons with large angular momentum. Moreover, this radiation can be employed as a superradiant coherent source of twisted photons in the infrared domain, in particular, in the THz part of the electromagnetic spectrum. Several general selection rules for the radiation and absorbtion of twisted photons are proved. These selection rules allow one, in particular, to modulate the one-particle radiation probability by means of scattering of charged particles on symmetrically arranged crystals. *

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Section: Introductionmentioning

confidence: 76%

Probability of radiation of twisted photons in the infrared domain

2019

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Section: Synchrotron-radiation Ftir Spectroscopy In Mineral Sciences ...mentioning

confidence: 99%

“…For electrons at a relativistic speed, the fringe field is like a "sharp edge transition" from a zero field to a full field value and the associated impulsive acceleration originates the emission of light. The emission spectrum of ER is limited and does not extend to the X-ray domain; however, in the low-frequency (IR, THz) range it is comparable to the standard synchrotron radiation spectrum (Geloni et al 2009a(Geloni et al , 2009b.The main advantage of synchrotron radiation is its brilliance. In spite of it, large angles are required to extract from bending magnets long wavelength radiation such as IR radiation, because the "natural" opening angle increases up to several tens milliradians in the far-IR range.…”

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confidence: 99%

SR-FTIR Microscopy and FTIR Imaging in the Earth Sciences

Ventura

Marcelli

Bellatreccia

2014

Reviews in Mineralogy and Geochemistry

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2 INTRODUCTIONInfrared spectroscopy was developed at the beginning of the XX century for analytical chemical purposes and it is remarkable that the first contribution of the first issue of Physical Review, one of the first and among the most important physical magazines, published in 1883, was devoted to "a study of the transmission spectra of certain substances in the infrared" that included also a plate of a quartz rock crystal (Nichols 1883). In 1905 William W.Coblentz released the very first database of IR spectra where the characteristic wavelength at which various materials absorbed the IR radiation were listed. For more than a century IR spectroscopy has been considered as a powerful analytical tool for phase identification and to characterize the structural features and quantify molecules or molecular arrangements in solids, and also in liquids and gases. This technique has been used extensively by organic chemists, and since the 1950s it has been recognized as a fundamental technique in mineralogical and Earth sciences in conjunction with X-ray diffraction (Keller and Pickett 1949, 1950, Launer 1952, Adler and Kerr 1965. The first "encyclopedia" of IR spectra of minerals appeared in 1974 (Farmer 1974) and is still a primary reference for those using infrared spectroscopy as a tool in material science.In the late '60s -beginning of '70s a new IR technique, Fourier-transform infrared (FTIR) spectroscopy, was developed and later a new class of spectrometers was commercially available, based upon the combination of a FFT (Fast-Fourier-Transform) algorithm and computers. The advantage of these instruments over the previously used wavelengthdispersive spectrometers is fully described in several books, e.g. Griffiths and de Haseth (1986) and Smith (1996). Briefly, in FTIR spectrometers IR light is focused through an interferometer and then through the sample. A moving mirror inside the apparatus alters the distribution of infrared light (wavelength) that passes through the interferometer. The recorded signal, called an interferogram, represents light output as a function of mirror position, which correlates with wavelength. A FFT data-processing transforms the raw data into the sample spectrum. A major advantage of the FTIR spectrometers is that the information in the entire frequency range is collected simultaneously, improving both speed and signal-to-noise ratio (SNR).During the last decades, several books have been devoted to the application of spectroscopic methods in mineralogy, e.g. Volume 18 of Reviews in Mineralogy (Hawthorne 1988). Several short courses (e.g. Beran and Libowitzky 2004) and meetings have addressed particular aspects of spectroscopy, such as the analysis of hydrous components in minerals 3 and Earth materials (e.g. Keppler and Smyth 2006). In these books, complete treatment of the infrared theory and practical aspects of instrumentation and methods, along with an exhaustive list of references, can be found.The present chapter is intended to cover those aspects of infrared spectroscopy t...

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“…TELBE, FLUTE, FLASH, FERMI, LCLS, and SPARC are some examples of large facilities using this type of CTR modules [42]. A similar mechanism for high field THz emission is the edge radiation [43,44] generated by directing electrons through a longitudinal magnetic field gradient. Edge radiation-based THz generation attains energies up to 10 μJ, giving a peak electric field up to 3 MV/cm.…”

Section: Conventional Terahertz Sourcesmentioning

confidence: 99%

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

et al. 2022

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Free-Electron Lasers are a rapidly growing field for advanced science and applications, and worldwide facilities for intense field generation, characterization and usage are becoming increasingly popular due to their peculiarities, including extremely bright, coherent, wide band tunable ultra-short pulses which are not achievable with other techniques up to now. In this review we give a thorough survey of the latest advances in the Free-Electron Laser-based field generation and detection methodologies and then present the main characteristics of a future THz/IR source, named TerRa@BriXSinO, based on a superconducting linear accelerator. The foreseen source is strongly monochromatic, with a bandwidth of 1% or smaller, highly coherent both transversally and longitudinally, with extreme versatility and high frequency tunability. After introducing the most recent and novel FEL-assisted scientific investigations, including fundamental explorations into complex systems and time-dependent interactions and material dynamics, we present our vision on the potential use of the TerRa facility and analyze some possible applications, ranging from non-linear physics under extreme conditions to polarization sensitive imaging and metamaterial-based sensing.

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Theory of edge radiation. Part II: Advanced applications

Cited by 14 publications

References 21 publications

Probability of radiation of twisted photons in the infrared domain

Probability of radiation of twisted photons in the infrared domain

SR-FTIR Microscopy and FTIR Imaging in the Earth Sciences

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

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