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.

scholarly journals The HEPS project

2018 ◽  
Vol 25 (6) ◽  
pp. 1611-1618 ◽  
Author(s):  
Yi Jiao ◽  
Gang Xu ◽  
Xiao-Hao Cui ◽  
Zhe Duan ◽  
Yuan-Yuan Guo ◽  
...  
Keyword(s):  
Storage Ring ◽  
High Energy ◽  
High Energy Photon ◽  
Energy Photon ◽  
High Brightness ◽  
X Ray ◽  
Longitudinal Gradients ◽  
Beijing China ◽  
Photon Source ◽  
Central Slice

The High Energy Photon Source (HEPS), a 6 GeV green-field diffraction-limited storage ring light source, will be built in Beijing, China. The HEPS design has been evolving for about ten years, and is now mostly finished and ready for construction. The storage ring is based on a modified hybrid seven-bend achromat (7BA) design, where bending magnets with reverse bending angles and longitudinal gradients are adopted to reach an ultralow natural emittance of 34.2 pm with a circumference of 1360.4 m. The central slice of the dipole in the middle of the modified hybrid 7BA, with flexible magnetic field, is used as the source of the bending-magnet beamline. Moreover, alternating high- and low-beta sections are specially designed to generate and deliver X-ray synchrotron radiation with high brightness of 5 × 1022 photons s−1 mm−2 mrad−2 (0.1% bandwidth)−1. Here, the HEPS storage ring design and solutions to the challenges inherent in this ultralow-emittance design are presented.

Modification and optimization of the storage ring lattice of the High Energy Photon Source

2020 ◽  
Vol 4 (4) ◽  
pp. 415-424 ◽  
Author(s):  
Yi Jiao ◽  
Fusan Chen ◽  
Ping He ◽  
Chunhua Li ◽  
Jingyi Li ◽  
...  
Keyword(s):  
Storage Ring ◽  
High Energy ◽  
High Energy Photon ◽  
Energy Photon ◽  
Photon Source

High heat load absorbers in Taiwan Photon Source storage ring

2010 ◽  
Vol 1 (MEDSI-6) ◽  
Author(s):  
I. C. Sheng ◽  
Y. T. Cheng ◽  
C. K. Kuan ◽  
G. Y. Hsiung ◽  
J. R. Chen
Keyword(s):  
Synchrotron Radiation ◽  
Storage Ring ◽  
High Heat ◽  
High Energy ◽  
Dipole Source ◽  
X Rays ◽  
High Heat Load ◽  
Under Construction ◽  
Power Densities ◽  
Photon Source

Taiwan Photon Source (TPS) is under construction at the National Synchrotron Radiation Research Center (NSRRC). This 518 m circumference synchrotron accelerator will generate 3 GeV and 500 mA high-energy X-rays. Absorbers in the storage ring will receive relatively high power densities (at a distance of 2.2 m from the dipole source). Three types of crotch absorbers for B1–B3 storage chambers were designed and prototyped. An end absorber in B3 is also designed and implemented to protect the downstream components in the chamber from being heated by the synchrotron radiation. Intensive vacuum brazing between Oxygen Free High Conductivity copper (OFHC) and stainless steel was carried out while fabricating the absorber assembly. The analysis, design and construction of several absorbers are reported in this paper.

scholarly journals Daisy: Data analysis integrated software system for X-ray experiments

2021 ◽  
Vol 251 ◽  
pp. 04020
Author(s):  
Yu Hu ◽  
Ling Li ◽  
Haolai Tian ◽  
Zhibing Liu ◽  
Qiulan Huang ◽  
...  
Keyword(s):  
Data Analysis ◽  
High Energy ◽  
Software System ◽  
Energy Photon ◽  
X Ray ◽  
High Throughput Data ◽  
Extensive Range ◽  
Algorithmic Problems ◽  
Integrated Software ◽  
Photon Source

Daisy (Data Analysis Integrated Software System) has been designed for the analysis and visualisation of X-ray experiments. To address the requirements of the Chinese radiation facilities community, spanning an extensive range from purely algorithmic problems to scientific computing infrastructure, Daisy sets up a cloud-native platform to support on-site data analysis services with fast feedback and interaction. Furthermore, the plug-in based application is convenient to process the expected high throughput data flow in parallel at next-generation facilities such as the High Energy Photon Source (HEPS). The objectives, functionality and architecture of Daisy are described in this article.

scholarly journals Conceptual design of TXM beamline at high energy photon source

2019 ◽  
Author(s):  
Qingxi Yuan ◽  
Kai Zhang ◽  
Wanxia Huang ◽  
Ming Li ◽  
Lingfei Hu ◽  
...  
Keyword(s):  
Conceptual Design ◽  
High Energy ◽  
High Energy Photon ◽  
Energy Photon ◽  
Photon Source

scholarly journals A new experimental setup for high-throughput controlled non-photochemical laser-induced nucleation: application to glycine crystallization

2014 ◽  
Vol 47 (4) ◽  
pp. 1252-1260 ◽  
Author(s):  
Bertrand Clair ◽  
Aziza Ikni ◽  
Wenjing Li ◽  
Philippe Scouflaire ◽  
Vincent Quemener ◽  
...  
Keyword(s):  
Energy Density ◽  
Laser Beam ◽  
High Throughput ◽  
Beam Energy ◽  
Laser Beams ◽  
Experimental Setup ◽  
Field Of Study ◽  
Technical Description ◽  
Beam Energy Density

Non-photochemical laser-induced nucleation (NPLIN) has been a growing field of study since 1996, and more than 40 compounds including organics, inorganics and proteins have now been probed under various conditions (solvents, laser types, laser beamsetc.). The potential advantages of using this technique are significant, in particular polymorphic control. To realize these benefits, the objective is a carefully designed experimental setup and highly controlled parameters, for example temperature and energy density, in order to reduce the uncertainty regarding the origin of nucleation. In this paper, a new experimental setup designed to study NPLIN is reported. After a full technical description of the present setup, the different functionalities of this device will be illustrated through results on glycine. Glycine crystals obtained through NPLIN nucleate at the meniscus and exhibit different morphologies. The nucleation efficiency, as a function of the supersaturation of the solution used and the laser beam energy density, has also been established for a large number of samples, with all other parameters held constant.

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