Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8208789 | Applied Radiation and Isotopes | 2018 | 10 Pages |
Abstract
A white neutron beam line using back-streaming neutrons from the spallation target is under construction at China Spallation Neutron Source (CSNS). Different spectrometers, to be installed in the so-called Back-n beam line for nuclear data measurements, are also being developed in phases. The physical design of the beam line is carried out with the help of a complicated collimation system and a sophisticated neutron dump, taking the overview of the neutron beam characteristics into account. This includes energy spectrum, flux and time structure, the optimizations of neutron beam spots and in-hall background. The wide neutron energy range of 1Â eV-100Â MeV is excellent for supporting different applications, especially nuclear data measurements. At Endstation#2, which is about 80Â m away from the target, the main properties of the beam line include neutron flux of 106Â n/cm2/s, time resolution of a few per mille over nearly the entire energy range, and in-hall background of about 0.01/cm2/s for both neutron and gamma. With its first commission in late 2017, Back-n will not only be the first high-performance white neutron source in China, but also one of the best white neutron sources in the world.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
L.Y. Zhang, H.T. Jing, J.Y. Tang, Q. Li, X.C. Ruan, J. Ren, C.J. Ning, Y.J. Yu, Z.X. Tan, P.C. Wang, Y.C. He, X.Q. Wang,