Treatment of the heat-load—associated contrast in synchrotron radiation topography

1997 ◽  
Vol 19 (2-4) ◽  
pp. 247-256 ◽  
Author(s):  
F. Zontone ◽  
L. Mancini
Keyword(s):  
Synchrotron Radiation ◽  
Heat Load

scholarly journals Diffraction-limited storage-ring vacuum technology

2014 ◽  
Vol 21 (5) ◽  
pp. 878-883 ◽  
Author(s):  
Eshraq Al-Dmour ◽  
Jonny Ahlback ◽  
Dieter Einfeld ◽  
Pedro Fernandes Tavares ◽  
Marek Grabski
Keyword(s):  
Thermal Conductivity ◽  
Synchrotron Radiation ◽  
Storage Ring ◽  
Heat Load ◽  
Storage Rings ◽  
Vacuum System ◽  
Vacuum Level ◽  
Vacuum Technology ◽  
And Performance ◽  
Compact Lattice

Some of the characteristics of recent ultralow-emittance storage-ring designs and possibly future diffraction-limited storage rings are a compact lattice combined with small magnet apertures. Such requirements present a challenge for the design and performance of the vacuum system. The vacuum system should provide the required vacuum pressure for machine operation and be able to handle the heat load from synchrotron radiation. Small magnet apertures result in the conductance of the chamber being low, and lumped pumps are ineffective. One way to provide the required vacuum level is by distributed pumping, which can be realised by the use of a non-evaporable getter (NEG) coating of the chamber walls. It may not be possible to use crotch absorbers to absorb the heat from the synchrotron radiation because an antechamber is difficult to realise with such a compact lattice. To solve this, the chamber walls can work as distributed absorbers if they are made of a material with good thermal conductivity, and distributed cooling is used at the location where the synchrotron radiation hits the wall. The vacuum system of the 3 GeV storage ring of MAX IV is used as an example of possible solutions for vacuum technologies for diffraction-limited storage rings.

scholarly journals Relationship between Dislocation Density and Macro Strain of High-Heat-Load Materials

2014 ◽  
Vol 996 ◽  
pp. 33-38
Author(s):  
Mutsumi Sano ◽  
Sunao Takahashi ◽  
Atsuo Watanabe ◽  
Ayumi Shiro ◽  
Takahisa Shobu
Keyword(s):  
Synchrotron Radiation ◽  
Dislocation Density ◽  
Aluminum Oxide ◽  
Heat Load ◽  
Fine Particles ◽  
High Heat ◽  
Diffraction Profile ◽  
High Heat Load ◽  
Ultra Fine Particles

A relationship between dislocation density and macro strain was investigated for GLIDCOP, dispersion-strengthened copper with ultra-fine particles of aluminum oxide. The dislocation density was estimated by applying the Warren-Averbach method to a diffraction profile measured using synchrotron radiation.

scholarly journals Design and performance of the APPLE-Knot undulator

2015 ◽  
Vol 22 (4) ◽  
pp. 901-907 ◽  
Author(s):  
Fuhao Ji ◽  
Rui Chang ◽  
Qiaogen Zhou ◽  
Wei Zhang ◽  
Mao Ye ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Heat Load ◽  
Arbitrary Polarization ◽  
Optical Surfaces ◽  
Key Factor ◽  
Accelerator Technology ◽  
Slope Error ◽  
And Performance ◽  
Surface Distortions

Along with the development of accelerator technology, synchrotron emittance has continuously decreased. This results in increased brightness, but also causes a heavy heat load on beamline optics. Recently, optical surfaces with 0.1 nm micro-roughness and 0.05 µrad slope error (r.m.s.) have become commercially available and surface distortions due to heat load have become a key factor in determining beamline performance, and heat load has become a serious problem at modern synchrotron radiation facilities. Here, APPLE-Knot undulators which can generate photons with arbitrary polarization, with low on-axis heat load, are reported.

Practical design and performance of a new merged APPLE-Knot undulator

2020 ◽  
Vol 27 (6) ◽  
pp. 1494-1498
Author(s):  
Fayuan Zhang ◽  
Zhipeng Sun ◽  
Yuxi Qiao ◽  
Shan Qiao
Keyword(s):  
Synchrotron Radiation ◽  
Storage Ring ◽  
Heat Load ◽  
Vacuum Ultraviolet ◽  
Polarization Mode ◽  
Shanghai Synchrotron Radiation Facility ◽  
Vertical Polarization ◽  
Electron Volt ◽  
Practical Design ◽  
And Performance

Constructing vacuum-ultraviolet beamlines at synchrotron radiation facilities with giga-electron volt storage ring results in serious heat load on the beamlines which can reduce their performance. To solve this problem, an APPLE-Knot undulator with eight magnet rows has been built at the Shanghai Synchrotron Radiation Facility and has achieved very good performance. However, its performance in vertical polarization mode is imperfect. Here, a new configuration of a magnet-merged APPLE-Knot undulator that has achieved a better performance is reported.

Beamline 14: a new multipole wiggler beamline for protein crystallography on the SRS

1998 ◽  
Vol 5 (3) ◽  
pp. 497-499 ◽  
Author(s):  
E. M. H. Duke ◽  
R. C. Kehoe ◽  
P. J. Rizkallah ◽  
J. A. Clarke ◽  
C. Nave
Keyword(s):  
Synchrotron Radiation ◽  
High Intensity ◽  
Radiation Source ◽  
Heat Load ◽  
Protein Crystallography ◽  
High Heat ◽  
Synchrotron Radiation Source ◽  
High Heat Load ◽  
The Uk

A new multipole wiggler device has been designed for the 2.0 GeV Synchrotron Radiation Source at Daresbury Laboratory in the UK. The nine-pole 2.0 T device will provide radiation for two beamlines dedicated to protein crystallography, one of which will be of high intensity. This article provides details of the design of the two stations and outlines methods being developed to combine dealing with the high heat load from the radiation while allowing both stations to be built as close to the centre of the fan as possible.

Performance of the YB66 soft X-ray monochromator crystal at the wiggler beamline of the UVSOR facility

1998 ◽  
Vol 5 (3) ◽  
pp. 726-728 ◽  
Author(s):  
Toyohiko Kinoshita ◽  
Yasutaka Takata ◽  
Tokuo Matsukawa ◽  
Hirofumi Aritani ◽  
Shigehiro Matsuo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Synchrotron Radiation ◽  
Energy Resolution ◽  
Energy Region ◽  
Heat Load ◽  
Photon Flux ◽  
Double Crystal ◽  
X Ray ◽  
Double Crystal Monochromator ◽  
Monochromator Crystal

Soft X-ray spectra have been measured using a pair of YB66(400) monochromator crystals at the double-crystal monochromator beamline BL7A of the UVSOR facility, where the wiggler radiation has a magnetic field of 4 T. Deformation of the YB66 crystal due to heat load from the synchrotron radiation is almost negligible. The photon flux is about 108 photons s−1 (100 mA)−1 in the energy region 1.2–2 keV and the energy resolution is 0.7 ± 0.1 eV around hν = 1.5 keV. These results show that the YB66 crystal is suitable for use as a monochromator crystal. Its application to soft X-ray spectroscopy is discussed.

Heat load in IR from synchrotron radiation and beam loss for CEPC double ring scheme

2021 ◽  
pp. 2142012
Author(s):  
Sha Bai ◽  
Chenghui Yu ◽  
Yiwei Wang ◽  
Jie Gao
Keyword(s):  
Synchrotron Radiation ◽  
Temperature Rise ◽  
Load Distribution ◽  
Heat Load ◽  
Superconducting Magnet ◽  
Research Area ◽  
Interaction Region ◽  
Beam Loss ◽  
Double Ring ◽  
Electron Positron

With the discovery of the Higgs boson at around 125 GeV, a circular Higgs factory design with high luminosity [Formula: see text] is becoming more popular in the accelerator world. The CEPC project in China is one of them. Machine Detector Interface (MDI) is the key research area in electron–positron colliders, especially in CEPC, since the synchrotron radiation (SR) photons can contribute to the heat load of the beam pipe and radiation dose may damage the components. And the heat load can cause the temperature rise in some part, and if the temperature rise is too high, the beryllium pipe in the interaction region will melt and the superconducting magnet may quench. Thus, the heat load distribution from synchrotron radiation and beam loss in the interaction region are analyzed carefully and results are given in this paper.

Precise measuring method for detecting the in situ distortion profile of a high-heat-load mirror for synchrotron radiation by use of a pentaprism long trace profiler

1997 ◽  
Vol 36 (16) ◽  
pp. 3769 ◽  
Author(s):  
Shinan Qian ◽  
Werner Jark ◽  
Giovanni Sostero ◽  
Alessandro Gambitta ◽  
Fabio Mazzolini ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Heat Load ◽  
Measuring Method ◽  
High Heat ◽  
High Heat Load
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