Study of quadrupole mass filter supplied with a new impulsional potential

摘要

The paper reports on some theoretical studies concerning the impulsional mode of a quadrupole mass filter (QMF) supplied with a new periodic impulsional radio frequency voltage of the form Vaccos(ωt) ?1 + kcos(1?3ωt) ?. ? 1 - √kcos(2ωt) with 0 ≤ k < 1 (?. ? means floor function) and eventually compares it to the classical sinusoidal case, k = 0. The physical properties of the confined ions in the r and z directions are illustrated and the fractional mass resolutions m / δm of the confined ions in the first stability regions of both potential were analyzed for hydrogen isotopes and presented.