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Related Concept Videos

Fischer Projections02:18

Fischer Projections

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Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
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Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
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Coordinates and Map Projections01:29

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Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Phagocytosis00:41

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Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis (“cellular eating”) is one of three major types of endocytosis. Cells use phagocytosis to take in large objects—such as other cells (or their debris), bacteria, and even viruses.
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Updated: Feb 2, 2026

Anti-Nuclear Antibody Screening Using HEp-2 Cells
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The HEPS project.

Yi Jiao1, Gang Xu1, Xiao Hao Cui1

  • 1Key Laboratory of Particle Acceleration Physics and Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, People's Republic of China.

Journal of Synchrotron Radiation
|November 9, 2018
PubMed
Summary
This summary is machine-generated.

The High Energy Photon Source (HEPS) in Beijing will feature an ultralow emittance storage ring, utilizing a modified seven-bend achromat design. This advanced light source aims to deliver high-brightness X-ray synchrotron radiation for scientific research.

Keywords:
High Energy Photon Source (HEPS)diffraction-limited storage ringmodified hybrid seven-bend achromat

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Area of Science:

  • * Accelerator Physics
  • * Synchrotron Radiation Technology
  • * Particle Beam Dynamics

Background:

  • * The High Energy Photon Source (HEPS) is a new 6 GeV synchrotron light source under construction in Beijing, China.
  • * The HEPS project has undergone a decade of design evolution, nearing completion for construction.
  • * Existing light sources face limitations in brightness and emittance for advanced research.

Purpose of the Study:

  • * To present the finalized design of the HEPS storage ring.
  • * To detail the innovative solutions employed to achieve ultralow emittance.
  • * To highlight the capabilities for generating high-brightness X-ray synchrotron radiation.

Main Methods:

  • * Implementation of a modified hybrid seven-bend achromat (7BA) lattice.
  • * Utilization of bending magnets with reverse bending angles and longitudinal gradients.
  • * Design of alternating high- and low-beta sections for optimized beam delivery.

Main Results:

  • * Achieved an ultralow natural emittance of 34.2 pm.
  • * Designed a storage ring with a circumference of 1360.4 m.
  • * Enabled generation of X-ray synchrotron radiation with a brightness of 5 × 10^22 photons s^-1 mm^-2 mrad^-2 (0.1% bandwidth)^-1.

Conclusions:

  • * The HEPS design successfully integrates advanced techniques to achieve unprecedented low emittance.
  • * The finalized HEPS storage ring is ready for construction, promising a powerful new tool for scientific discovery.
  • * The innovative lattice design ensures high-brightness X-ray generation for diverse research applications.