Simple Method For The Determination Of The Characteristic Photon Energy E c Of A Storage Ring By X-Ray Measurement At Photon Energies Around 20 E c .

1986 ◽  
Author(s):  
F. Riehle ◽  
E. Tegeler
Keyword(s):  
Photon Energy ◽  
Storage Ring ◽  
Simple Method ◽  
X Ray

Method of Measurement of Mean Concentration for an Element Segregated in Layers by X-Ray Analysis

1977 ◽  
Vol 21 ◽  
pp. 143-147
Author(s):  
I. Vander
Keyword(s):  
Fluorescence Analysis ◽  
Primary Radiation ◽  
Angle Of Incidence ◽  
Simple Method ◽  
X Ray ◽  
Elemental Compositions ◽  
Detection Angle ◽  
Method Of Measurement ◽  
Mean Concentration

Traditionally, in X-ray fluorescence analysis for the determination of elemental compositions, the fluorescence is measured from the irradiated side of the sample. The composition measurements obtained by this method are sensitive to a gradient in composition as a function of depth of the element being measured. This report presents a simple method for measuring a mean composition for an element segregated in layers applicable to thin samples so that the fluorescence can be measured on the side opposite to that being irradiated. It is shown that for a particular relation between the angle of incidence of the primary radiation and of the detection angle on the opposite side of the sample that a mean concentration can be measured for an element which is independent of the composition in the separate layers.

scholarly journals A simple pressure-assisted method for MicroED specimen preparation

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jingjing Zhao ◽  
Hongyi Xu ◽  
Hugo Lebrette ◽  
Marta Carroni ◽  
Helena Taberman ◽  
...  
Keyword(s):  
High Viscosity ◽  
Specimen Preparation ◽  
Universal Method ◽  
X Ray Diffraction ◽  
Simple Method ◽  
X Ray ◽  
Wide Range ◽  
Major Bottleneck ◽  
Crystal Electron

AbstractMicro-crystal electron diffraction (MicroED) has shown great potential for structure determination of macromolecular crystals too small for X-ray diffraction. However, specimen preparation remains a major bottleneck. Here, we report a simple method for preparing MicroED specimens, named Preassis, in which excess liquid is removed through an EM grid with the assistance of pressure. We show the ice thicknesses can be controlled by tuning the pressure in combination with EM grids with appropriate carbon hole sizes. Importantly, Preassis can handle a wide range of protein crystals grown in various buffer conditions including those with high viscosity, as well as samples with low crystal concentrations. Preassis is a simple and universal method for MicroED specimen preparation, and will significantly broaden the applications of MicroED.

Fast and simple method for determination of fatty acid methyl esters (FAME) in biodiesel blends using X-ray spectrometry

Talanta ◽  
2011 ◽  
Vol 85 (4) ◽  
pp. 2000-2006 ◽  
Author(s):  
Rafal Sitko ◽  
Beata Zawisza ◽  
Zofia Kowalewska ◽  
Karina Kocot ◽  
Marzena Polowniak
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Simple Method ◽  
Biodiesel Blends ◽  
X Ray ◽  
Acid Methyl

scholarly journals A soft X-ray plane-grating monochromator optimized for elliptical dipole radiation from modern sources

2015 ◽  
Vol 22 (5) ◽  
pp. 1301-1305 ◽  
Author(s):  
Torsten Kachel ◽  
Frank Eggenstein ◽  
Rolf Follath
Keyword(s):  
Photon Energy ◽  
Storage Ring ◽  
Energy Resolution ◽  
Plane Mirror ◽  
Excellent Performance ◽  
Dipole Radiation ◽  
X Ray ◽  
Grating Monochromator ◽  
Elliptically Polarized ◽  
Internal Plane

A new but yet well proven way of making elliptically polarized dipole radiation from the BESSY II storage ring applicable to the SX700-type collimated plane-grating monochromator PM3 is described. It is shown that due to the limited vertical acceptance of the grating a simple use of vertical apertures is not possible in this case. Rather, deflecting the beam upwards or downwards by rotating the vertically collimating toroidal mirror M1 around the light axis leads to excellent performance. The resulting detuning of the photon energy can be taken into account by a readjustment of the monochromator internal plane mirror M2. The energy resolution of the beamline is not affected by the non-zero `roll' of the collimating mirror.

Determination of X-ray pulse duration via intensity correlation measurements of X-ray fluorescence

2019 ◽  
Vol 26 (6) ◽  
pp. 2050-2054 ◽  
Author(s):  
Ichiro Inoue ◽  
Kenji Tamasaku ◽  
Taito Osaka ◽  
Yuichi Inubushi ◽  
Makina Yabashi
Keyword(s):  
Pulse Duration ◽  
Free Electron ◽  
Free Electron Laser ◽  
Coherence Time ◽  
Metal Foil ◽  
Intensity Correlation ◽  
Simple Method ◽  
X Ray

A simple method using X-ray fluorescence is proposed to diagnose the duration of an X-ray free-electron laser (XFEL) pulse. This work shows that the degree of intensity correlation of the X-ray fluorescence generated by irradiating an XFEL pulse on metal foil reflects the magnitude relation between the XFEL duration and the coherence time of the fluorescence. Through intensity correlation measurements of copper Kα fluorescence, the duration of 12 keV XFEL pulses from SACLA was evaluated to be ∼10 fs.

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