scholarly journals IMAGE CONVERSION OF ϭ- AND π-COMPONENTS OF RADIATION OF RELATIVISTIC ELECTRON AND METROLOGICAL CHARACTERISTICS OF THE PHOTON FLUX IN THE SYNCHROTRON RADIATION OUTLET

2021 ◽  
pp. 160-164
Author(s):  
A.S. Mazmanishvili ◽  
N.V. Moskalets ◽  
A.A. Shcherbakov
Keyword(s):  
Angular Distribution ◽  
Synchrotron Radiation ◽  
Spectral Density ◽  
Photon Flux ◽  
Optical Channel ◽  
Relativistic Electrons ◽  
Beam Size ◽  
Optical Window ◽  
Image Conversion ◽  
Anal Yses

The paper deals with the efficiency of the capture of a photon flux of the synchrotron radiation (SR) σ- and π-components by the optical window in the SR quantum extraction channel of the NESTOR generator. It also anal-yses the dependence between the capture quality and different radiation wavelengths. Consideration has been giv-en to the beam size effect on the shape and dimensions of the angular distribution of the photon flux. A model has been constructed to describe the optical imaging in the registration plane. Expressions are given for estimating the efficiency of the capture of SR quanta into the optical window of the extraction channel. The factors that exert influence on the efficiency of capturing through the window are analyzed. Examples of numerical calculations are provided for formation of the final SR spectral density of the 225 MeV relativistic electrons at the output of the optical channel. The dimensions of the optical window have been determined, which ensure the reliable registration of the total flux of SR quanta for the chosen spectral range of SR quanta wavelengths.

scholarly journals Brightness of synchrotron radiation from undulators and bending magnets

2015 ◽  
Vol 22 (2) ◽  
pp. 288-316 ◽  
Author(s):  
Gianluca Geloni ◽  
Vitali Kocharyan ◽  
Evgeni Saldin
Keyword(s):  
Electron Beam ◽  
Phase Space ◽  
Synchrotron Radiation ◽  
Wigner Distribution ◽  
Geometrical Optics ◽  
Single Electron ◽  
Beam Divergence ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Beam Size

The maximum of the Wigner distribution (WD) of synchrotron radiation (SR) fields is considered as a possible definition of SR source brightness. Such a figure of merit was originally introduced in the SR community by Kim [(1986),Nucl. Instrum. Methods Phys. Res. A,246, 71–76]. The brightness defined in this way is always positive and, in the geometrical optics limit, can be interpreted as the maximum density of photon flux in phase space. For undulator and bending magnet radiation from a single electron, the WD function can be explicitly calculated. In the case of an electron beam with a finite emittance the brightness is given by the maximum of the convolution of a single electron WD function and the probability distribution of the electrons in phase space. In the particular case when both electron beam size and electron beam divergence dominate over the diffraction size and the diffraction angle, one can use a geometrical optics approach. However, there are intermediate regimes when only the electron beam size or the electron beam divergence dominate. In these asymptotic cases the geometrical optics approach is still applicable, and the brightness definition used here yields back once more to the maximum photon flux density in phase space. In these intermediate regimes a significant numerical disagreement is found between exact calculations and the approximation for undulator brightness currently used in the literature. The WD formalism is extended to a satisfactory theory for the brightness of a bending magnet. It is found that in the intermediate regimes the usually accepted approximation for bending magnet brightness turns out to be inconsistent even parametrically.

Absolute photon flux and angular distribution of the Tokyo synchrotron radiation in the vacuum ultraviolet

1978 ◽  
Vol 152 (1) ◽  
pp. 219-223 ◽  
Author(s):  
Toshio Masuoka ◽  
Kazuo Kitamura ◽  
Takanori Oshio ◽  
Morotake Nishi ◽  
Hideo Onuki ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Synchrotron Radiation ◽  
Vacuum Ultraviolet ◽  
Photon Flux

Absolute Photon-Flux and Angular Distribution of the Tokyo Synchrotron Radiation in the Vacuum Ultraviolet

1976 ◽  
Vol 15 (8) ◽  
pp. 1579-1580 ◽  
Author(s):  
Toshio Masuoka ◽  
Takanori Oshio ◽  
Ryoichi Iwanaga ◽  
Hideyuki Sonoda ◽  
Yumio Morioka ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Synchrotron Radiation ◽  
Vacuum Ultraviolet ◽  
Photon Flux

Synchrotron radiation from single electrons gyrating in a magnetoactive plasma

1969 ◽  
Vol 47 (7) ◽  
pp. 757-768 ◽  
Author(s):  
P. C. W. Fung
Keyword(s):  
Synchrotron Radiation ◽  
Plasma Frequency ◽  
Radiation Power ◽  
Magnetoactive Plasma ◽  
Electron Plasma ◽  
Relativistic Electrons ◽  
Relative Importance ◽  
Numerical Examples ◽  
The Past ◽  
Single Electrons

In this paper, the incoherent synchrotron radiation power emitted by relativistic electrons gyrating in a cold magnetoactive plasma is rederived, correcting errors which have occurred in the past literature. One can specify the background plasma by the quantity A = ωp2/ωH2 (ωp is the angular electron plasma frequency and ωH is the angular electron gyro-frequency), i.e. the relative importance of the plasma frequency to the gyro-frequency. The general spectral features of synchrotron radiation from single electrons radiating in plasmas of large [Formula: see text] and small [Formula: see text] are discussed with the aid of a number of numerical examples.

A Scanning X-Ray Fluorescence Microprobe with Synchrotron Radiation

1987 ◽  
Vol 31 ◽  
pp. 495-502 ◽  
Author(s):  
Y. Gohshj ◽  
S. Aoki ◽  
A. Iida ◽  
S. Hayakawa ◽  
H. Yamaji ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Relative Concentration ◽  
Trace Element Analysis ◽  
Design Parameters ◽  
Absolute Amount ◽  
Beam Size ◽  
Element Analysis ◽  
X Ray ◽  
Better Than

SummaryA scantling X-ray fluorescence(XRF) microprobe using WoIter type 1 optics was developed, and micro and trace element analysis was carried out using synchrotron radiation up to 10 keV as an excitation source. The design parameters of the optical system and the performance of the system, such as the beam size and the intensity, are described. The MDL obtained for Mn was 6 ppm in relative concentration and about 0.1 pg in absolute amount. The estimated spatial resolution was better than 10 um.

Synchrotron X-ray Microbeam Characteristics for X-ray Fluorescence Analysis

1994 ◽  
Vol 38 ◽  
pp. 283-289
Author(s):  
A. Iida ◽  
T. Noma
Keyword(s):  
Detection Limit ◽  
Spectroscopic Analysis ◽  
Fluorescence Analysis ◽  
Photon Flux ◽  
Beam Size ◽  
X Ray ◽  
Available Energy ◽  
Practical Analysis ◽  
Micro Analysis ◽  
Non Destructive

X-ray fluorescence analysis using a synchrotron x-ray microprobe has become an indispensable technique for non-destructive micro-analysis. One of the most important parameters that characterize the x-ray microbeam system for x-ray fluorescence analysis is the beam size. For practical analysis, however, the photon flux, the energy resolution and the available energy range are also crucial. Three types of x-ray microbeam systems, including monochromatic and continuum excitation systems, were compared with reference to the sensitivity, the minimum detection limit and the applicability to various types of x-ray spectroscopic analysis.

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