Spatial coherence of synchrotron radiation

Coı̈sson, R.

doi:10.1364/ao.34.000904

Cited by 75 publications

(32 citation statements)

References 17 publications

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“…The working energy was set to E ¼ 17 keV ( ¼ 0:073 nm) either with a multilayer monochromator (ÁE=E ¼ 10 À2 ) or with a double flat Si(111) monochromator (ÁE=E ¼ 10 À4 ). With the experimental station placed at 40 m from the source, the transverse coherence length is approximately 9 m horizontally and 25 m vertically [13]. The divergence of the beam is 2.4 mrad horizontally and 180 rad vertically.…”

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confidence: 99%

Two-Dimensional X-Ray Beam Phase Sensing

et al. 2012

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We present a new method to analyze quantitatively the wave front of a partially coherent x-ray beam. The technique is based on the use of two-dimensional speckle patterns combined with digital image correlation algorithms and offers a pixel size resolution, a high accuracy, and a reduced sensitivity to mechanical vibrations thanks to a very simple setup. The requirements on transverse and longitudinal coherence are also low. Finally, we show how the method can be used for phase contrast imaging applications by a single sample exposure process.

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confidence: 99%

Two-Dimensional X-Ray Beam Phase Sensing

et al. 2012

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“…However, the direct amplification of radiation in plasmas is not the only means by which coherent soft x-ray radiation can be generated. Alternative methods include harmonic upconversion of high power optical lasers, [5][6][7][8] synchrotron sources, [9][10][11] and free electron lasers ͑FELs͒. 12,13 Synchrotron sources have the very important advantages of broad tunability and high average power.…”

Section: Introductionmentioning

confidence: 99%

“…For a description of the characteristics and status of alternative methods for the generation of coherent soft x-ray radiation, the reader is referred to the literature. [5][6][7][8][9][10][11][12][13] The quest for practical x-ray lasers started shortly after the demonstration of the first lasers in 1960. 19 Proposals of excitation schemes for x-ray lasers date back to 1965, when the possibility of achieving soft x-ray amplification by collisional recombination was first suggested by Gudzenko and Shelepin.…”

Section: Introductionmentioning

confidence: 99%

Table-top Soft X-Ray Lasers

Rocca

2016

Conference on Lasers and Electro-Optics

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This article reviews the progress in the development of practical table-top sources of soft x-ray laser radiation. The field is rapidly approaching the stage at which soft x-ray lasers sufficiently compact to fit onto a normal optical table will be routinely utilized in science and technology. This is the result of recent advances in the amplification of soft x-ray radiation in both compact laser-pumped and discharge-pumped devices. The use of excitation mechanisms that take full advantage of new ultrafast high power optical laser drivers and multiple pulse excitation schemes has resulted in the demonstration of saturated soft x-ray amplification at wavelengths as short as 14 nm using several Joule of laser-pump energy. Moreover, several schemes have demonstrated significant gain with only a fraction of a Joule of laser-pump energy. In addition, the demonstration of saturated table-top soft x-ray lasers pumped by very compact capillary discharges has shattered the notion that discharge-created plasmas are insufficiently uniform to allow for soft x-ray amplification, opening a route for the development of efficient, high average power soft x-ray lasers. Recently, a table-top capillary discharge laser operating at 46.9 nm has produced millijoule-level laser pulses at a repetition rate of several Hz, with a corresponding spatially coherent average power per unit bandwidth comparable to that of a beam line at a third generation synchrotron facility. This review summarizes fundamental and technical aspects of table-top soft x-ray lasers based on the generation of population inversions in plasmas, and discusses the present status of development of specific laser systems.

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“…of essentially all elements, thus providing a powerful combination of techniques for the elemental and chemical analysis of physical and biological materials at very high spatial resolution. Tunable, coherent radiation in these spectral regions is available primarily due to the advent of undulator radiation at modern synchrotron facilities [12][13][14][15][16][17][18], where relativistic electron beams of small cross-section transverse periodic magnet structures, radiating very bright, powerful, and spatially coherent radiation at short wavelengths. Recent progress with EUV lasers [37,38], high laser harmonics [39,40], and free electron lasers [28] may soon add to these capabilities.…”

Section: Introductionmentioning

confidence: 99%

Coherence techniques at extreme ultraviolet wavelengths

Chang

2002

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Spatial coherence of synchrotron radiation

Abstract: Theory and measurement of spatial coherence of synchrotron radiation beams are briefly reviewed. Emphasis is given to simple relationships between electron beam characteristics and far field properties of the light beam.

Cited by 75 publications

References 17 publications

Two-Dimensional X-Ray Beam Phase Sensing

Two-Dimensional X-Ray Beam Phase Sensing

Table-top Soft X-Ray Lasers

Coherence techniques at extreme ultraviolet wavelengths

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