On Jan. 26, the Multi-Physics Instrument (MPI) received the neutron beam from the target station, marking the instrument's successful completion after two years of construction. MPI is CSNS's first user instrument and was built in cooperation with Dongguan University of Technology and the City University of Hong Kong. It is also the first neutron total scattering instrument in China.
MPI will mainly be used for research on materials with different ordered structures, focusing on structural analysis of long-range order and locally disordered materials, and long-range disorder and short-range ordered materials. It will serve both the Chinese mainland and Hong Kong users as an effective tool to probe materials, especially for research on materials science, condensed matter physics, life science and nano-materials.
CSNS's success comes against the backdrop of the Coronavirus pandemic, which created a difficult situation for CSNS scientists and engineers, especially when they couldn't proceed with production and installation of key components during the lockdown. Nevertheless, they managed to overcome these difficulties and successfully developed China's first 12-cubic-meter neutron scattering vacuum chamber. What's more, they also managed to install the neutron guide, even though they were unable to get any onsite help from the manufacturers due to the international lockdown.
The China Spallation Neutron Source (CSNS) target system has achieved a milestone progress by accepting from the manufacturers its control system and the plug before welding from November 1 to 6, 2015. The CSNS target control system is to monitor the target trolley, expansion flange and cooling water. In accordance with its needs, a perfect design with the required logic and interlocking system was made, emphasizing its safety and reliability.
After 24 hours'full capacity test at 120kV, the China Spallation Neutron Source (CSNS) completed the fabrication and the relevant integration test of its first 400 Hz series resonant high voltage power supply. The CSNS DTL klystron adopts 400 Hz series resonant high voltage power - a new type of pulse high voltage power supply. Based on the principle of series resonance between capacitor and choke, combining frequency conversion and pulse phase lock technologies plus auxiliary three-stage modulator and HV crowbar, the new type pulse high voltage power supply is developed. The new equipment is based on the home technologies and independently designed. Currently, it is unique with no such applications in other accelerator based laboratories. The equipment has the advantages of simple structure, reliable operation and low trouble rates, and is easy to be maintained.
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