CHEN Nian ZHANG Pengfei LI Ge XU Hongliang LI Yuhui ZHANG Shancai CAI Genwang HE Duohui. Simulation study of influence of undulator magnetic field error on spontaneous emission[J]. Nuclear techniques, 2005, (4): 258-262.
CHEN Nian ZHANG Pengfei LI Ge XU Hongliang LI Yuhui ZHANG Shancai CAI Genwang HE Duohui. Simulation study of influence of undulator magnetic field error on spontaneous emission[J]. Nuclear techniques, 2005, (4): 258-262.DOI:
Simulation study of influence of undulator magnetic field error on spontaneous emission
An undulator consists of many magnets. The unavoidable remanence divergence and dimension divergence of these magnets cause the undulator magnetic field error
including the peak magnetic field error
phase error
etc
which will affect the quality of the spontaneous emission spectrum. This paper presents the simulation method of permanent magnet magnetic field
undulator magnetic field and spontaneous emission. The normal school random numbers generator is applied to produce groups of magnets of different remanences or different sizes. Each group of the magnets can constitute the undulator. Then the spontaneous emission is calculated. And accordingly we can make a study of the influence of undulator magnetic field errors on spontaneous emission. Finally
the correlations between intensities of spontaneous emission and various magnetic filed errors are illustrated