The discovery of synchrotron radiation

Pollock, H. C.

doi:10.1119/1.13289

Cited by 61 publications

(17 citation statements)

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“…Although natural synchrotron radiation (SR) from charged particles spiralling around magnetic field lines in space is as old as the stars, short-wavelength synchrotron radiation generated by relativistic electrons in circular accelerators is only around a halfcentury old (Baldwin 1975;Pollock 1983). The first observation-literally since it was visible light that was seen-occurred at the General Electric Research Laboratory in Schenectady, New York in 1947.…”

Section: A Brief Introduction To Synchrotron Radiationmentioning

confidence: 99%

Synchrotron-based techniques for plant and soil science: opportunities, challenges and future perspectives

2009

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Spectroscopic approaches to plant and soil sciences have provided important information for several decades. However, many of these approaches suffered from a number of limitations and drawbacks especially in terms of spatial resolution and requirements for sample preparation. The advent of dedicated synchrotron facilities, that allow the exploitation of the particular qualities of synchrotron radiation as a research tool, has revolutionised the way we approach

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Section: A Brief Introduction To Synchrotron Radiationmentioning

confidence: 99%

Synchrotron-based techniques for plant and soil science: opportunities, challenges and future perspectives

2009

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“…In the mid-20th century, the discovery of X-ray synchrotron radiation and the later construction of dedicated synchrotron radiation facilities [10,11] allowed access to X-rays much more powerful than produced by conventional tube sources. The increasing availability of synchrotrons and in particular the development of high-brilliance third-generation synchrotron sources [12] at the end of the 20th century significantly pushed the advances in X-ray science.…”

Section: Introductionmentioning

confidence: 99%

State of the Art of X-ray Speckle-Based Phase-Contrast and Dark-Field Imaging

Zdora

2018

J. Imaging

106

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Abstract:In the past few years, X-ray phase-contrast and dark-field imaging have evolved to be invaluable tools for non-destructive sample visualisation, delivering information inaccessible by conventional absorption imaging. X-ray phase-sensing techniques are furthermore increasingly used for at-wavelength metrology and optics characterisation. One of the latest additions to the group of differential phase-contrast methods is the X-ray speckle-based technique. It has drawn significant attention due to its simple and flexible experimental arrangement, cost-effectiveness and multimodal character, amongst others. Since its first demonstration at highly brilliant synchrotron sources, the method has seen rapid development, including the translation to polychromatic laboratory sources and extension to higher-energy X-rays. Recently, different advanced acquisition schemes have been proposed to tackle some of the main limitations of previous implementations. Current applications of the speckle-based method range from optics characterisation and wavefront measurement to biomedical imaging and materials science. This review provides an overview of the state of the art of the X-ray speckle-based technique. Its basic principles and different experimental implementations as well as the the latest advances and applications are illustrated. In the end, an outlook for anticipated future developments of this promising technique is given.

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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: 72%

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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The discovery of synchrotron radiation

Cited by 61 publications

References 1 publication

Synchrotron-based techniques for plant and soil science: opportunities, challenges and future perspectives

Synchrotron-based techniques for plant and soil science: opportunities, challenges and future perspectives

State of the Art of X-ray Speckle-Based Phase-Contrast and Dark-Field Imaging

Spectral and angular distributions of synchrotron radiation in quantum theory

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