The quadrupole moment tensor Q is a rank-two tensor —3×3 matrix. There are several definitions, but it is normally stated in the traceless form (i.e. ). The quadrupole moment tensor …

The meaning of QUADRUPOLE is a system composed of two dipoles of equal but oppositely directed moment.

The quadrupole field continues to alternate as the ions travel through the mass analyzer. This causes the ions to undergo a complex set of motions that produces a three-dimensional wave.

May 15, 2025 · Quadrupole Moment and Potential by Dr. Colton, Physics 441 (last updated: 15 May 2025)

A quadrupole mass spectrometer consists of an ionizer (bombardment by electrons from a hot filament), an ion accelerator, and a mass filter consisting of four parallel metal rods arranged …

Electric Quadrupole

Nov 19, 2025 · A quadrupole or quadrapole is one of a sequence of configurations of things like electric charge or current, or gravitational mass that can exist in ideal form, but it is usually just …

The quadrupole moment is a measure of the deviation of an object's charge distribution from spherical symmetry. It is a higher-order multipole moment that describes the degree to which …

May 27, 2024 · The principle of an electric quadrupole involves a system of charges or the electric field’s distribution which forms a unique arrangement. This arrangement consists of two pairs …

…of focusing magnet is a quadrupole, a magnet built with four poles (two norths and two souths) arranged opposite each other. This arrangement pushes particles toward the centre in one …