Home   |   Contact   |   Sitemap   |   中文   |   CAS
Home|About Us|People|Press|Facilities|Int’l Cooperation|Papers|Research|Education & Training
About Us
Brief Introduction
Address from the Director
Organization Chart
Contact Us

  Location: Home > About Us
Brief Introduction

The Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences (CAS) was founded in

 IHEP Main Building (Image by IHEP)

February 1973. Its predecessor, the Institute of Modern Physics was founded in 1950, later renamed as the Institute of Physics, and the Institute of Atomic Energy. The Institute of High Energy Physics was established on the basis of the First Department of the Institute of Atomic Energy. IHEP is a comprehensive research base for particle and astroparticle physics, accelerator physics and technology, radiation technologies and applications, as well as for nuclear analytical techniques and interdisciplinary research.

By June 2013, IHEP has a staff of 1,348 persons, of whom 1,095 persons are research and technical personnel (81.5% of the total), 150 are management personnel, the rest are supporting and logistic services personnel. We have 18 scientists holding positions in major international scientific organizations and academic journals.

The IHEP Yuquan Road Campus covers an area of 315,000 square meters, and encompasses a number of experimental halls, laboratories, office buildings, a library and many supporting facilities totaling 73,000 square meters. A new campus with an area of 600,000 square meters in Dongguan, Guangdong Province, for the China Spallation Neutron Source is under construction.

IHEP serves as the backbone of the China’s major scientific facilities, including the Beijing

 A Bird’s View of BEPCII in 2009 (Image by IHEP)

Electron Positron Collider (BEPC), the Beijing Spectrometer (BES), the Beijing Synchrotron 
Radiation Facility (BSRF), the International Cosmic-Ray Observatory at Yangbajing in Tibet, the Daya Bay Reactor Neutrino Experiment, the China Spallation Neutron Source, the Hard X-ray Modulation Telescope, the Accelerator-driven Sub-critical System (ADS) as well as the Jiangmen Underground Neutrino Observatory (JUNO). In addition, there are laboratories with partial or full supports by the funding agencies within the institute, the three CAS key laboratories supported by CAS and the two laboratories supported by the city of Beijing.

IHEP has established its reputation as one of the major High Energy Physics (HEP) laboratories in the world since October 1988, when the Beijing Electron Positron Collider (BEPC) was completed with successful e+e- collisions. Several important physics results have been obtained since then by the Beijing Spectrometer (BES) collaboration, such as the precision measurement of the τ lepton mass, direct and model-independent measurement of the Ds meson decay constant, precision measurement of resonance parameters of the J/ψ charmonium, and precision measurement of hadron cross section (R value) of electron-positron annihilations in the 2-5 GeV energy region.

In July 2009, the major upgrade of BEPC (BEPCII) passed the State Acceptance Test and was put into operation. The luminosity of BEPCII was increased initially by a factor of 30 over BEPC, and was 4 times more than that of CESRc in the same energy region. In recent years, the luminosity of BEPCII has been continuously improved to an unprecedented level while the BESIII Collaboration. A number of very important new results such as the Discovery of Charged Charmonium Zc (3900), the First Observation of Many New Light Hadrons, etc. attracted a lot of attention from the international HEP community and scientific journals.





With advanced accelerator and analytical nuclear technologies, IHEP carries out studies on condensed-matter physics, chemistry, life science, materials science, nano-science, environmental science, etc. The BSRF has 5 insertion devices and 14 beamlines with experimental stations. Its research fields cover physics, chemistry, biology, environment and medicine, etc. About 300-400 experiments are carried out each year by nearly 100 national research institutions. The BSRF also carries out interesting studies in the fields of protein crystallography, nano-materials, X-ray phase contrast imaging, experimental techniques, etc. With this facility, a number of highly visible results have been obtained, including the protein structure of SARS, the protein complex structure of light harvesting membrane from spinach, the protein structure of higher plants capture film and the mechanism of arsenic treatment of leukemia, etc. 

IHEP has actively pursued non-accelerator-based particle and astroparticle physics research. The
 Daya Bay Reactor Neutrino Experiment (Image by IHEP)
Daya Bay Reactor Neutrino Experiment was proposed in 2003 and started the construction in 2007 and operation in late 2011. In March 2012, the discovery of a new type of neutrino oscillation was announced with a precise measurement of the unknown neutrino mixing parameter θ13. This is a very significant result well received by the international science community and was selected as one of the top ten Breakthroughs of the Year 2012 by Science magazine.

Another internationally renowned experiment is the cosmic-ray observatory at an altitude of 4,300 meters above sea level at Yangbajing, Tibet. In fact, there are two large air shower arrays: one is the Sino-Japanese ASγ experiment commissioned in 1990, and the other is the Sino-Italian ARGO-YBJ experiment started since 2001. IHEP is also engaged in space-borne experiments. Examples include a γ-ray burst detector on board of the Shenzhou II test flight of the Chinese manned space program, an x-ray spectrometer for the Chinese moon exploratory program, etc. The Hard X-ray Modulation Telescope (HXMT), which was officially approved in 2010, is the first dedicated satellite for space science in China, and will be launched in 2015.




YBJ Cosmic Ray Observatory                                                  CSNS Under Construction

IHEP is also expanding its user-facility from X-rays to neutrons. A new facility, called China Spallation Neutron Source (CSNS) is now under construction in Dongguan, Guangdong province. It will be one of the world's four spallation neutron sources.

Over the years, IHEP has developed wide and strong cooperative ties with the international high energy physics community. Today it has become one of the leading research institutions in the field of high energy physics in the world.

The PRC/U.S. cooperation in high energy physics is one of the most important international
Members of the PRC/U.S. Joint Committee on High Energy Physics in front of the sculpture Rationale of Nature (Image by IHEP)
collaborations of IHEP, and has lasted for more than thirty years. The collaborative efforts have been concentrated on such major projects as the BEPC and BEPCII, the BES collaboration and the Daya Bay Reactor Neutrino Experiment.

IHEP has a long history of extensive cooperation with the European and Asian high energy physics communities, including CERN, INFN, DESY, CNRS, RAL, KEK and PLS. IHEP hosts the BESIII and the Daya Bay Collaborations with the participation of hundreds of scientists from dozens of countries, and also hosts the Sino-Japanese and the Sino-Italian Cosmic Ray Collaborations in Tibet. IHEP takes part in collaborations of AMS, ATLAS, BELLE & BELLE II, CMS, EXFEL, ILC, PANDA, etc.

IHEP is authorized to confer Master and Ph.D. degrees in theoretical physics, particle physics and nuclear physics, condensed matter physics, optics, inorganic chemistry, nuclear technology and applications, and applied computer technology. In fact, the first doctor degree of China was conferred by IHEP in 1982. IHEP is among the first authorized institutions to set up a post-doctoral research station in physics and nuclear science and technology. The first post-doctor was fostered at IHEP in 1984. Till August 2013, there are more than 470 postgraduate students and more than 50 post-doc fellows at IHEP.

Contact information:

Institute of High Energy Physics, Chinese Academy of Sciences

Website: http://english.ihep.cas.cn/

Mailing address: 19B YuquanLu, Shijingshan District, Beijing, 100049

Contact person: Mr. XU Tongzhou, Manager of Director’s Office, IHEP

Email: xutz@ihep.ac.cn

FAX: 86-10-88233374  TEL: 86-10-88233093


Copyright ©2002-2013 Institute of High Energy Physics, CAS
Questions and Comments to webmaster@ihep.ac.cn
mailing address:19B YuquanLu, Shijingshan District
Beijing, 100049 FAX: 86-10-88233374 TEL: 86-10-88233093