Published On: Fri, Dec 6th, 2019

Quadrupole and other pole magnets

Author: Radoje Jankovic

Photo by author

  1. Quadrupole magnets

Quadropole magnets or as it is called Q-magnet consists of four magnets as shown in Fig. 1. Q-magnet consists of four reciprocating permanent magnet mounted on the poles alternately facing and thus make a four-pole magnet. Such magnets are used for focusing the beam of particles …. The lines of magnetic force coming out of the north magnetic pole of a magnet and enter the south magnetic pole of another magnet and so on, creating a transducer.

In practice, it can use electromagnets with iron cores, which are supplied with electricity, thereby generating transducer.

Fig. 1. shows a complete demonstration device for using iron filings to show the magnetic lines of force of the quadrupole magnet. 

FIG. 1. Four bar magnets configured to produce a quadrupole

2. Eightpole magnet – Octopole magnet

Eithpolle magnet consists of eight bar permanent magnets arranged alternately S-N-S-N-S-N-SN as shown in the picture. And this octopole magnet can be made of an electromagnet in a specific arrangement with the proper connection of the electromagnet coil. Today I got to do a complete demonstration device with which you could view the range of the magnetic field of the octopole. But there will be time.

Fig. 2. Eight bar magnets configured to produce a octopole

3. Four horseshoe magnets configured to produce multipole

Fig. 3. Four horseshoe magnets configured to produce multipole

4. Six horseshoe magnets configured to produce multipoles

Fig. 4. Six horsechoe magnets configured to produce multipoles

For more details see 1. https://en.wikipedia.org/wiki/Quadrupole_magnet

2. https://en.wikipedia.org/wiki/Sextupole_magnet

3. https://en.wikipedia.org/wiki/Multipole_magnet

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Quadrupole and other pole magnets