china – EPICS Controls

Beijing Electron Positron Collider (BEPC-II)

Ralph Lange — Tue, 21 May 2019 09:34:47 +0000

BEPC-II is the upgrade project of Beijing Electron Positron Collider (BEPC), located at the Institute of High Energy Physics in Beijing. It serves both high energy physics and synchrotron radiation experiments.

As an e+/e− collider, it consists of an electron ring and a positron ring. The two rings cross each other at the south interaction point, where the detector is located. For the dedicated synchrotron radiation mode, an electron beam circulates in the ring consisting of the two outer half rings.

EPICS has been used successfully in the BEPC-II accelerator control system.

Antarctic Bright Star Survey Telescope (BSST)

Ralph Lange — Thu, 18 Apr 2019 08:20:23 +0000

The Antarctic Bright Star Survey Telescope (BSST) is an optical telescope built by University of Science and Technology of China (USTC) and Nanjing Institute of Astronomical Optics & Technology, China Academy of Science. It was installed in the Antarctic Great Wall Station in 2016.

The Scientific goal of BSST is for exoplanet survey. BSST has an aperture size of 300 mm and is equipped with a large-frame 4K*4K CCD camera to receive starlight from a 3.4◦×3.4◦ field of view.

Due to the harsh environment in the Antarctica, the control software is designed to be very stable and fully automated. A remote web interface is also designed especially for the low bandwidth, high latency satellite communication.

Shanghai Synchrotron Radiation Facility (SSRF)

Ralph Lange — Tue, 11 Sep 2018 09:56:56 +0000

The Shanghai Synchrotron Radiation Facility (SSRF), a third-generation medium-energy synchrotron light source, consists of a 150 MeV electron linac, a full-energy booster, a 3.5 GeV electron storage ring, 13 beamline experiment stations as well as 1 part-time secondary beamline experiment station. 7 beamlines of Phase I were open to domestic users on May 6, 2009. Additional 5 beamlines and 6 stations for protein research and one Dream Line were formally put into operation in 2015.

SSRF gives priority to original fundamental research, applied research with important application prospects and high-tech development to improve technical innovation in China, and encourages users to undertake national and ministerial major research projects, and welcome industry users to use SSRF. Users have been playing in leading role in its operation and opening, which is conductive to featured scientific objectives, prioritize key research fields, and promote important scientific outcomes.

The Shanghai soft X-ray Free-Electron Laser facility (SXFEL) is the first Chinese coherent light source in the wavelength range of 20 nm to 2 nm. It is based on a 1.5 GeV normal conducting high gradient C-band linac and currently contains two FEL beamline, a seeded FEL beamline and a SASE beamline, and five experimental stations. This facility is being developed at the SSRF campus in two steps, named the SXFEL test facility (SXFEL-TF) and the SXFEL user facility (SXFEL-UF). Currently, the 0.84 GeV linac based SXFEL-TF is under commissioning, aiming to test the related key technologies and the two-stage cascaded HGHG-HGHG or EEHG-HGHG scheme. In the meantime, the user experiments oriented SXFEL-UF is being developed at a designated wavelength down to the water window region, towards the user service in 2019.