Effect of magnetic field inhomogeneity on exact mass determination in ICR spectrometry

摘要: Abstract At present, in ICR spectrometry increasing interest exists the development of spectrometers utilizing superconducting solenoid magnets with magnetic field strength up to about 80 kG, which extend measurable mass range into region higher masses. But, due such high strengths, inhomogeneities, grow proportion increasingly affect accuracy measurements. Therefore, highest possible homogeneous fields are aim technical developments. The extent it is necessary improve homogeneity used by aid expensive technology order achieve a still effect respect exact determination investigated this work. For purpose, change cyclotron frequency inhomogeneity will be calculated and resulting difference between measured actual masses determined. As mathematical form problem complicated frame classical mechanics, advantageous use different method. Regarding quantum mechanical Schrodinger equation problem, we calculate contributions perturbation theoretically wavepacket formalism. relation shift experimental parameters given magnitude estimated for limiting conditions. It shown that, even most unfavorable case, influence negligibly small.