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Keywords = nested rotate sextupole permanent magnet (Nest-Rot-SPM) lens

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15 pages, 3928 KiB  
Article
Further Optimized Design of a Nested Rotate Sextupole Permanent Magnet Lens for the Focusing of Pulsed Neutrons
by Taisen Zuo, Zhanjiang Lu, Changdong Deng, Songwen Xiao, Yongcheng He, Zhenqiang He, Xiong Lin, Changli Ma, Zehua Han and He Cheng
Quantum Beam Sci. 2022, 6(3), 25; https://doi.org/10.3390/qubs6030025 - 26 Jul 2022
Cited by 3 | Viewed by 2463
Abstract
A compact nested rotate sextupole permanent magnet (Nest-Rot-SPM) lens was designed for the focusing of pulsed neutrons. It is based on the working conditions of the Very Small Angle Neutron Scattering (VSANS) instrument at the China Spallation Neutron Source (CSNS), and is expected [...] Read more.
A compact nested rotate sextupole permanent magnet (Nest-Rot-SPM) lens was designed for the focusing of pulsed neutrons. It is based on the working conditions of the Very Small Angle Neutron Scattering (VSANS) instrument at the China Spallation Neutron Source (CSNS), and is expected to focus a neutron pulse from 6 Å to 10.5 Å, without chromatic aberration. Three hurdles must be addressed, i.e., the tremendous torque, the heat deposition, and the synchronization with the neutron pulse, respectively. The bore diameter and segment length of the lens are optimized using a formula analysis of the key parameters and model simulations of the torque and heat deposition. A twin torque canceling design is used to reduce the torque to one-third of its original value, or even lower. The goal of this project is to take the device into practical use in the VSANS at the CSNS. Full article
(This article belongs to the Special Issue New Trends in Neutron Instrumentation, 2nd Edition)
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