Potential reduction interior point algorithm unfolding of neutron energy spectrum measured by recoil

• 作 者: 王冠鹰 韩然 欧阳晓平 何锦成 颜俊尧
• 机 构: North China Electric Power University,Beijing Institute of Spacecraft Environment Engineering,Northw
• 出 处: Chinese Physics C
• 发表日期: 2017年05期
• 关键词: neutron proton interior iteration nonnegative satisfactory match steps direction

A reconstruction algorithm for unfolding neutron energy spectra has been developed,based for the first time on the potential reduction interior point algorithm.This algorithm can be easily applied to neutron energy spectrum reconstruction in the recoil proton method.We transform the neutron energy spectrum unfolding problem into a typical nonnegative linear complementarity problem.The recoil proton energy spectrum and response matrix at angles of 0?and 30?are generated by the Geant4 simulation toolkit.Several different neutron energy test spectra are also employed.It is found that this unfolding algorithm is stable and provides efficient,accurate results.

A reconstruction algorithm for unfolding neutron energy spectra has been developed, based on the first time on the potential reduction interior point algorithm. This algorithm can be easily applied to neutron energy spectrum reconstruction in the recoil proton method. We transform the neutron energy spectrum unfolding problem into a typical nonnegative linear complementarity problem. The recoil proton energy spectrum and response matrix at angles of 0? and 30? are generated by the Geant4 simulation toolkit. Selective different neutron energy test spectra are also employed. It is found that this unfolding algorithm is stable and provides efficient, accurate results.