SIMULATION OF DEFLECTING SYSTEM BASED ON PERMANENT MAGNETS WITH A NON-UNIFORM MAGNETIC FIELD TO REGISTER ACCELERATED AND DECELERATED ELECTRONS GENERATED IN DIELECTRIC LASER ACCELERATOR

Deflection system was designed and computed to spatially separate beam of electrons with different energies in the range of several tens of kiloelectronvolts. Three specific cases with electron energies of (33.9 ± 0.3), (18.2 ± 0.3), and (14.2 ± 0.3) keV were examined for experiments using Dielectric Laser Accelerators. The results of calculations of the spatial distribution of the magnetic field induced by a pair of permanent magnets and its effect on electrons moving in this field are presented. Such magnetic spectrometers differ from their analogues in that par- ticles do not move along the center between magnets in a uniform magnetic field, but along their periphery, where the field is non-uniform, which provides higher resolution. Presented spectrometer provides the electron energy resolution of less than 10 eV. Research on such systems holds significant importance for the further development of methods for analyzing electrons with varying energies in modern accelerators and spectrometers.