octupole

octupole

[′äk·tə‚pōl]
(physics)
Two electric or magnetic quadrupoles having charge distributions of opposite signs and separated from each other by a small distance.
Any device for controlling beams of electrons or other charged particles, consisting of eight electrodes or magnetic poles arranged in a circular pattern, with alternating polarities; commonly used to correct aberrations of quadrupole systems.
References in periodicals archive ?
The levels' energy, spin, parity, y-bands, branching ratios, level energy differences between the positive and negative parity bands, octupole deformation, [gamma]-[gamma] coincidences and angular distribution were measured.
There is evidence that dark matter clusters and groups may have substructure with a significant octupole deformation (Irwin, J.
The operation parameters were the following: drying gas (nitrogen) flow rate 9 L/min, drying gas temperature 350[degrees]C; nebulizing gas (nitrogen), 35psi; fragmentation voltage 175 V; skimmer voltage 60 V; octupole DC-1 37 V; capillary voltage 3500 V.
Regarding the magnets, India supplied the Sextupole, Decapole and Octupole Magnets used in the LHC.
(2.8) up to the order 3, and it is shown how the toroid dipole appears together with the charge octupole moment, the magnetic quadrupole moment, and the first mean square radius of the electric dipole.
A principal component of ALPHA's atom trap is a superconducting octupole magnet proposed and prototyped in Berkeley Lab's AFRD.
The multi-poles are generally designated as [2.sup.l]-poles, where / is the order of the multi-pole: l = 0 represents the monopole (point charge); l = 1 gives the dipole; l = 2 the quadrupole; l = 3 the octupole; and so on.
The main component is an octupole (eight-magnetic-pole) magnet whose fields keep anti-atoms away from the walls of the trap and thus prevent them from annihilating.
On the Wisconsin "Levitated Octupole" experiment, Prager worked with a graduate student, Michael Zarnstorff, now a principal research physicist at PPPL, detecting for the first time the so-called bootstrap current, named because the electrical current is generated by the plasma itself.
Pipin, Dipole, Quadrupole, Octupole, and Dipole-Octupole Polarizabilities at Real and imaginary Frequencies for H, He, and [H.sub.2] and the Dispersion-Energy Coefficients for Interactions Between Them, Inter.
The measured B(El) strengths are of the same order as those reported for El inter-band transitions in nuclei with a substantial dipole moment arising from octupole collectivity.