Beijing Synchrotron Radiation Facility presentations

1. Prof. Yuhui Dong, Direct of BSRF,
"Introduction of High Energy Photon Source (HEPS)".
(30 minutes)

The progress of the research in material and other fields evokes higher requirements for synchrotron radiation, especially the high-brilliance and high-energy hard X-ray. This kind of hard X-ray would provide the chance to study the structures of real materials under real conditions, as well as the real-time structures with very high spatial, energy and time resolutions.

One of the important tendencies in the development of synchrotron radiation sources is low emmitance. Low emmitance storage rings could provide higher brilliance, which is very important for all kinds of experiments in synchrotron radiation facilities. For example, the emmitance of NSLS-II, a new facility in Brookhaven National Laboratory, is 1.0nmrad. The emmitance of MAX-IV, another new facility in Sweden, goes down to 0.3nmrad.

In the meantime, the successful construction of Shanghai Synchrotron Radiation Facility and the great achievements in the research in this facility, inspire the users to build the new and high-performance light sources in China. In the view point of regional factors, the vast in territory of China requires the reasonable distribution of synchrotron radiation facilities which support the scientific and technological research, in order to farthest satisfy the demands of users from different regions.

Based on the above reasons, we are planning to build a new synchrotron radiation facility in the region around Beijing: High Energy Photon Source (HEPS). The designed electron energy of HEPS is 6GeV and the emmitance is lower than 0.1nmrad. This machine can provide the hard X-ray with brilliance higher than 1022ph/s/mm2/mrad2/0.1%BW and photon energy higher than 300keV. Also HEPS keeps the possibility of upgrading to more advanced light source (XERL or diffraction limit storage ring).

The main purpose of HEPS is to satisfy the urgent requirements of material sciences, especially the real-time structures of engineering materials under service environment. Certainly, the high brilliance hard X-ray from HEPS can also provide a very good support in other fields of research, such as condensed matter physics, chemistry, environment sciences, life sciences, etc.

2. Prof. Peng Liu,
"The Developement of the X-ray Optics and Technology in BSRF"  &
“The Developement of Detectors for Synchrotron Radiation in IHEP”
(30 minutes)

The report will introduce the progress in the research and the development of detectors for synchrotron radiation, including the 2-dimensional pixel array detectors, the nanosecond time resolved detectors and the imaging detectors, etc.

3. Prof. Peiping Zhu,
"Progress of differential phase contrast imaging in BSRF"
(20 minutes)

The phase contrast imaging research at BSRF is focused on differential phase contrast imaging. From diffraction enhanced imaging, grating based imaging, differential interference microscopy to X-ray differential phase contrast microscopy which was invented by the speaker in 2012, the studies have been carried out for 13 years. In this talk, the speaker will give a new description to the mechanism of differential phase contrast imaging and propose a new concept of angular response function for angular signal imaging. In the end the speaker will introduce the next step to pursue high angular sensitivity X-ray microscopy.