Harm onic balance method and the nonlinear ion trap

Ion trap mass spectr ometeris a device that ca n separate ions, according to theirm ass to char ge ratio. One of the mo st common type of this spectrome ter is quadr upolefieldio n trap. In this article we review the equations of motion of ions in a nonlinearion trap and calculate t he secular axialfrequen cies of ion motion by usingharmonic bala nce method.The results obtained by the harm onic balance method areclose to the results of iteration method.

کلیدواژه ها:

quadrupo lefield ، ion trap ، secular frequencies ، harmonic b alance meth od.