Radiation from Electrons Accelerated in a Synchrotron

Elder, F.R.; Langmuir, R. V.; Pollock, H. C.

doi:10.1103/physrev.74.52

Cited by 118 publications

(25 citation statements)

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“…Adjusting the accelerator, Haber has noticed a weak light [12,[122][123][124]. These observation confirmed both the existence of SR, predicted by Ivanenko and Pomeranchuk in [44], and the conclusion that the critical frequency of the radiation from an electron (i.e.…”

Section: Quantum Spectrum Of the Radiationsupporting

confidence: 55%

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Spectral and angular distributions of synchrotron radiation in quantum theory

Burimova¹

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AcknowledgementI am using this opportunity to express my gratitude to everyone who supported me throughout my Doctorate course at IF USP. Immeasurable appreciation and deepest gratitude are extended to my adviser, Professor Dmitrii Maximovitch Guitman, as well as to all the members of "Quanta" group. I am thankful for their aspiring guidance, patience and friendly advice during the project work. This thesis was written as a summary of research project which was generally supported by FAPESP foundation.I am sincerely grateful to our collaborator, Professor Vladislav Gavriilovitch Bagrov, for his constructive criticism and fruitful advice.My sincere thank also goes to the members of the Comission of Qualification Exam for their remarks, advice and observations. These were of great help during the revision of particular chapters of this thesis.I kindly appreciate the support and patience of Post-Graduate Comission of IF USP and it is my greatest pleasure to thank Eber de Patto Lima personally.Special gratitude goes to Nelson Yokomizo, the former member of "Quanta" group and Thais Silva, Doctorate student of IAG. My family and friends, who had been helping me throughout all these years of work deserve special thanks. Thank you. i ii ResumoConsideramos as características da radiação síncrotron (RS) noâmbito da teoria quântica. Para simplificar a descrição teórica do processo de radiação restringimosà consideração da emissão deúnico fóton. Para transições quânticas arbitrárias, as distribuições espectrais e angulares da potência da RS são dadas de forma analítica exata. Tratamos separadamente partículas escalares (bósons) e com spin /2 (elétrons). Atenção especialé dadaàs transições particulares, a saber, as transições ao primeiro estado excitado e estado fundamental.É mostrado que os componentes de polarização linear da radiação de elétron se trocam em relaçãoà orientação de spin quando o elétron passa para o estado fundamental.Este fato pode ser considerado como uma comprovação analítica para a presenca de π-componente da radiação quântica no plano de movimento.Analisamos minuciosamente a radiação emitida pela partícula fracamente excitada. Várias funções são introduzidas para descrever a evolução dos perfis de distribuições angulares para sistemas de dois e três níveis. Para transições quânticas do primeiro estado excitado ao estado fundamental a análise comparativa da radiação de bósons e elétronsé realizada, e isso ajuda a estimar a influência de spin e sua direção sobre as características da RS. A radiação de elétrons não polarizadosé considerada separadamente. Observando o comportamento dosângulos efetivos,é fácil perceber a inconsistência da conclusão clássica bem conhecida sobre a concentração de radiação ultra-relativista total no plano do movimento.Mostramos que osângulos efetivos da radiação quântica tendem aos valores finitos e não desaparecem na região ultrarelativista.Uma revisão breve da teoria clássica inclui a introdução do conceito novo, istoé a n-parte do espectro.A fim de encontrar um análogo clás...

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Section: Quantum Spectrum Of the Radiationsupporting

confidence: 55%

“…Wide spectrum of SR [10,11] gives an opportunity to work with frequencies required in particular experiment. One of the most important features of SR is a high degree of polarization [12][13][14][15].…”

Section: Contents Introductionmentioning

confidence: 99%

Spectral and angular distributions of synchrotron radiation in quantum theory

Burimova¹

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“…The classical theory also tells us that SR is strongly linearly polarized [7], with P σ = 7 8 P and P π = 1 8 P , where σ-component is the one where the electric field lies in the plane of the electron orbit while π-component is the one where the electric field lies in the plane perpendicular to the orbital plane. Experimentally, these properties of SR have been demonstrated with high precision for a wide range of frequencies [8] - [11].…”

Section: Synchrotron Radiationmentioning

confidence: 94%

A Spin-Light Polarimeter for Multi-GeV Longitudinally Polarized Electron Beams

Mohanmurthy

Dutta

2014

IEEE Trans. Nucl. Sci.

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Abstract-The physics program at the upgraded Jefferson Lab (JLab) and the physics program envisioned for the proposed electron-ion collider (EIC) include large efforts to search for interactions beyond the Standard Model (SM) using parity violation in electroweak interactions. These experiments require precision electron polarimetry with an uncertainty of < 0.5 %. The spin dependent Synchrotron radiation (SR), called "spinlight," can be used to monitor the electron beam polarization. In this article we develop a conceptual design for a "spin-light" polarimeter that can be used at a high intensity, multi-GeV electron accelerator. We have also built a Geant4 based simulation for a prototype device and report some of the results from these simulations.

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“…This radiation has now been observed visually in the General Electric 70-Mev synchrotron." (Elder, Langmuir and Pollock, 1948).…”

Section: A Voyage Of Discoverymentioning

confidence: 99%

Generation X-ray – A coming of age

Fox¹

2015

Arbor

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ABSTRACT:In 2014, the scientific community celebrated the impact crystallography has had on fundamental and applied science, and the ground-breaking discoveries that have gifted us with vision into the molecular and nano-worlds. UNESCO has declared 2015 as the International Year of Light, so now is perhaps a well timed moment to reflect on the role synchrotrons play in the field. Access to synchrotron radiation has revolutionized our ability to explore the properties, interactions and structure of materials, and broadened our understanding in diverse scientific arenas ranging from our cultural heritage, to nano-technology and new materials, to cellular systems and drug discovery. The range of potential synchrotron applications and fields of interest is enormous and beyond the scope of any single article, so my aim here, is simply to provide a snapshot filtered through the lens of biological crystallography. We will look back at how synchrotrons developed into the state-ofthe-art facilities we see today, how beamlines adapted to the quickening brought on by the introduction of high throughput techniques at the turn of the millennium, and forward to some of the new directions and technologies that are transforming modern light sources and crystallography.KEYWORDS: beamline; light sources; membrane protein; microfluidics; protein crystallography; serial crystallography; structural biology; synchrotron; XFEL. RESUMEN:La comunidad científica celebró en 2014 el impacto que la cristalografía ha tenido sobre la ciencia fundamental y aplicada, así como los de descubrimientos relevantes que nos han proporcionado una visión del mundo a escala molecular y nanométri-ca. La UNESCO ha declarado 2015 como el Año Internacional de la Luz por lo que quizás es un buen momento para reflexionar sobre el papel que han jugado y juegan los sincrotrones en esta ciencia. El acceso a la radiación sincrotrón ha revolucionado nuestra capacidad para explorar las propiedades, interacciones y estructura de materiales, así como ampliado nuestro conocimiento en distintos contextos científicos, desde el patrimonio cultural a la nanotecnología y nuevos materiales, hasta la exploración de sistemas celulares y búsqueda de fármacos. El rango de potenciales aplicaciones de los sincrotrones y sus campos de interés es vasto y queda fuera del alcance de un único artículo por lo que la intención del autor es la de proporcionar una imagen de los sincrotrones obtenida a través del filtro de la cristalografía macromolecular. Echaremos la vista atrás para ver cómo los sincrotrones han ido evolucionado hasta llegar a las actuales instalaciones en donde las líneas de trabajo asociadas a los mismos se están adaptado rápidamente a la introducción de las técnicas de alto rendimiento en el cambio del milenio; pero también miraremos hacia el futuro, hacia las nuevas tendencias y tecnologías que ya están transformando las actuales instalaciones y la misma cristalografía.PALABRAS CLAVE: biología estructural, cristalografía de proteínas, cristalografía en serie, línea, ...

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Radiation from Electrons Accelerated in a Synchrotron

Cited by 118 publications

References 6 publications

Spectral and angular distributions of synchrotron radiation in quantum theory

Spectral and angular distributions of synchrotron radiation in quantum theory

A Spin-Light Polarimeter for Multi-GeV Longitudinally Polarized Electron Beams

Generation X-ray – A coming of age

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