Design considerations for a new beamline for standard EXAFS at a high-energy low-emittance storage ring

2012 ◽  
Vol 19 (6) ◽  
pp. 905-910 ◽  
Author(s):  
Edmund Welter
Keyword(s):  
Storage Ring ◽  
High Energy ◽  
Design Considerations ◽  
Low Emittance

scholarly journals Coherence properties of the high-energy fourth-generation X-ray synchrotron sources

2019 ◽  
Vol 26 (6) ◽  
pp. 1851-1862 ◽  
Author(s):  
R. Khubbutdinov ◽  
A. P. Menushenkov ◽  
I. A. Vartanyants
Keyword(s):  
Electron Beam ◽  
Storage Ring ◽  
High Energy ◽  
Storage Rings ◽  
Relative Energy ◽  
Diffraction Limit ◽  
Energy Spread ◽  
Fourth Generation ◽  
X Ray ◽  
Low Emittance

An analysis of the coherence properties of the fourth-generation high-energy storage rings with emittance values of 10 pm rad is performed. It is presently expected that a storage ring with these low emittance values will reach diffraction limit at hard X-rays. Simulations of coherence properties were performed with the XRT software and an analytical approach for different photon energies from 500 eV to 50 keV. It was demonstrated that a minimum photon emittance (diffraction limit) reached at such storage rings is λ/2π. Using mode decomposition it is shown that, for the parameters of the storage ring considered in this work, the diffraction limit will be reached for soft X-ray energies of 500 eV. About ten modes will contribute to the radiation field at 12 keV photon energy and even more modes give a contribution at higher photon energies. Energy spread effects of the electron beam in a low-emittance storage ring were analysed in detail. Simulations were performed at different relative energy spread values from zero to 2 × 10−3. A decrease of the degree of coherence with an increase of the relative energy spread value was observed. This analysis shows that, to reach the diffraction limit for high photon energies, electron beam emittance should go down to 1 pm rad and below.

scholarly journals Using a pre-kicker to ensure safe extractions from the HEPS storage ring

2021 ◽  
Vol 32 (12) ◽  
Author(s):  
Zhe Duan ◽  
Jin-Hui Chen ◽  
Hua Shi ◽  
Guang-Yi Tang ◽  
Lei Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Storage Ring ◽  
Beam Energy ◽  
High Energy ◽  
Energy Photon ◽  
Beam Energy Density ◽  
Safe Region ◽  
Under Construction ◽  
Photon Source ◽  
Low Emittance

AbstractThe High Energy Photon Source (HEPS) is a 6 GeV diffraction-limited storage ring light source under construction. The swap-out injection is adopted with the depleted bunch recycled via high-energy accumulation in the booster. The extremely high beam energy density of the bunches with an ultra-low emittance (about 30 pm horizontally and 3 pm vertically) and high bunch charges (from 1.33 to 14.4 nC) extracted from the storage ring could cause hazardous damage to the extraction Lambertson magnet in case of extraction kicker failure. To this end, we proposed the use of a pre-kicker to spoil the bunches prior to extraction, significantly reducing the maximum beam energy density down to within a safe region while still maintaining highly efficient extractions. The main parameters of the pre-kicker are simulated and discussed.

Compact Storage Ring with Longitudinal Magnetic Field and Electron Cooling

2010 ◽  
Vol 5 (3) ◽  
pp. 79-89
Author(s):  
Maxim I. Bryzgunov ◽  
Aleksandr V. Bublej ◽  
Vladimir A. Vostrikov ◽  
Vitaliy M. Panasyuk ◽  
Vasiliy V. Parkhomchuk ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Storage Ring ◽  
Longitudinal Magnetic Field ◽  
High Energy ◽  
Electron Cooling ◽  
Distinctive Features ◽  
Cooling Method ◽  
Energy Proton ◽  
Proton Current ◽  
Main Effects

Project of compact low energy proton storage ring (1.75 MeV) for production of high energy photons in reaction 13C(p,γ) 14N on internal target is presented. With the help of the photons it is possible to realize the scheme for detection of substances with heightened content of nitrogen using Nuclear Resonance Absorption method. Distinctive features of the construction are use of electron cooling method for beam heating compensation, and strong longitudinal magnetic field along full perimeter of the ring. For optimal work of electron cooling, compensation of space charge of the beam circulating in the ring is necessary. Results of simulation of main effects in the storage ring are shown. The results allow us to expect that proton current up to 100 mA can be stored and luminosity up to 3·1033 cm2 s -1 can be achieved

scholarly journals Basic Passive Side-Day lighting Considerations for High Rise office Building

2020 ◽  
Vol 9 (5) ◽  
pp. 78-87
Keyword(s):  
Energy Consumption ◽  
Construction Industry ◽  
Positive Impact ◽  
Building Design ◽  
High Energy ◽  
Office Building ◽  
High Rise ◽  
Design Considerations ◽  
System A ◽  
Modern Era

High rise office building design is one of the essential buildings in construction industry due to the limited space especially in the urban area. After home, a high rise office building is an important space for human in modern era. Due to the issue of high energy consumption especially inefficient artificial light strategy, side-day lighting becomes the best solution for a high rise office building design. Despite providing efficient energy consumption, side-day lighting creates a positive impact to the worker as well as the office's indoor environment. Hence, this paper aims to explore the basic passive side-day lighting considerations that educate people especially for those who are involved in the building construction industry. Beside, this paper focuses on the passive design considerations due to the various advantages that not involved especially with complex electrical and mechanical system. A systematic literature review is the main methodology for this paper to identify the basic passive side-day lighting considerations for a high rise office building design. Base on this research, it revealed that eight elements for building design considerations should be applied to provide a better day lighting impact for a high rise office building design. Considerations for non-building design aspects should also need to be applied since those aspects contribute to produce a better day lighting impact for a high rise office building design.

Longitudinal injection scheme for an ultra-low-emittance storage ring light source with a sine wave kicker

2019 ◽  
Vol 3 (4) ◽  
Author(s):  
Kun Wang ◽  
Chang-Liang Li ◽  
Zheng-He Bai ◽  
Man-Zhou Zhang ◽  
Qing-Lei Zhang ◽  
...  
Keyword(s):  
Light Source ◽  
Storage Ring ◽  
Sine Wave ◽  
Injection Scheme ◽  
Low Emittance
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