Abstract
The China Spallation Neutron Source (CSNS) is designed to provide multidisciplinary research platforms with neutron scattering. The neutron scattering provides a powerful research tool for material sciences and engineering, physics, chemistry, life sciences, energy and resource, environment, etc. The site of CSNS has been selected at Dongguan, Guangdong Province. The facility comprises an 80-MeV H- linear accelerator (Linac), a 1.6-GeV proton rapid cycling synchrotron (RCS), beam transport lines, a solid tungsten target station, and the experimental hall for the pulsed spallation neutron applications. The RCS provides a beam power of 100 kW on the target in the phase I. In the phase II, the beam energy of the Linac will be upgraded to 250 MeV, and the beam power can be further increased to 500 kW. There are three initial spectrometers of day-one in the experimental hall: general purpose powder diffractometer, small angle neutron scattering meter and magnetic reflectometer. The maximum number of the beamlines is 20 in the first target station. The construction of CSNS started in May 2012, and is going on smoothly. The mass productions of the accelerator components, target system and spectrometers are under way. The Linac installation started in October 2014 and the first neutron beam to the target is scheduled by September 2017. CSNS will be open to international users.
About the speaker
Prof Hesheng Chen received his PhD in Physics from the Massachusetts Institute of Technology in 1984. He was the Director General of the Institute of High Energy Physics (IHEP) of the Chinese Academy of Sciences from 1998 to 2011. He is currently Professor of IHEP and the Director of Beijing Electron-Positron Collider (BEPC) National Laboratory.
Prof Chen’s research field focuses on particle physics experiments. He had made major contributions to the discovery of gluon jet, the systematic study of gluon physics and the precision measurement of the electro-weak parameters in the Mark-J Experiment at DESY, and to the design and construction of the hadron calorimeter and the physics analysis in the L3 experiment at CERN. He led the team of BEPC and obtained important results in the charm energy region, including the precision measurement of R value between 2 to 5 GeV and the discovery of new resonance X1835, which could be a ppbar bound state. The Daya Bay reactor neutrino experiment was designed and constructed under his leadership. He also proposed the BEPC upgrade project (BEPCII), which is a double ring collider in the existing tunnel with the luminosity improved by two orders of magnitude for the study of charm physics. The peak and daily integrated luminosity of BEPCII have been increased by factors of 70 and more than 100 respectively, compared to the one before upgrade. The new resonance of Zc(3900), which is the 4-quark state with a unit charge, was discovered recently.
Prof Chen is a Member of the Chinese Academy of Sciences.
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