Octupole magnets can provide highly stable and controllable three-dimensional magnetic field, and they are now widely used in synchrotron radiation and the eight-pole vector magnet systems. Together with suitable software and high-precision excitation power supply, octupole magnets can be used as perfect magnetic field generating devices which have achieved many technical breakthroughs. Octupole magnets are used to stabilized the frequencies of particles, and this phenomenon is called "Landau damping," which provides the particle beam with a natural immunity to some unstable behaviors.
Features
The octupole magnet is designed to provide stable field, however, the increased stability and enhanced focusing of high-order multipole magnets come at a price. It can produce harmful resonances that reduce the overall range of positions and energies allowed for the particles. If particles find themselves outside this so-called 'dynamic aperture' range, they will disappear from the accelerator.
Application
Octupoles are mainly used in a variety of conditions such as multipole magnetic ring magnetization, radial gradient magnetic field, rotating magnetic field magnetic guidance and landau damping. Therefore, they are widely used for applications below:
- √ MRI scanners
- √ Mass spectrometers
- √ Electron beam equipment
- √ Accelerator
Design Consideration
The design is driven by the application, and therefore, all aspects shall be taken into consideration, and Fabmann engineering team always focuses on the following:
- √ Working aperture, the working air gap between the poles, which may include the required size of the beam clear area, the thickness of the vacuum chamber, and the installation air gap.
- √ Center magnetic field strength
- √ Magnetic length
- √ The scope of the useful field area, which refers to the space required for the beam clear area in the magnet
- √ Discreteness of the magnetic field between magnets, which refers to the root mean square deviation of the integrated magnetic field discreteness between each similar magnet
- √ The operating state of the magnet, whether the magnet excitation is DC or pulsating
- √ Space size restrictions
Our Model
FAB30-735
- Core length: 254mm
- Equivalent Magnetic Length: 260mm
- Magnetic Field Gradient (T/m³): 735,000
- Air Gap: 30mm
- Single Pole Excitation Ampere-Turns: 1300
- Excitation Efficiency: 95%
- Number of Turns per Pole: 15
- Excitation Current: 87A
- Hollow Conductor: 5*5mm Φ3
- Current Density (A/mm²): 4.95
- Total Resistance(mΩ): 94
- Outer Dimension: 810*315*591
- Weight: 375kg
FAB80-3846
- Core length:100mm
- Equivalent Magnetic Length: 105mm
- Magnetic Field Gradient (T/m³): 38460
- Air Gap: 80mm
- Maximum Excitation Current: 127.05A
- Number of Turns per Pole: 15
- Hollow Conductor: 4.55*4.5mm Φ2.5
- Current Density (A/mm²): 8.32
- Magnet Power (KW): 1.39
- Magnet Inductor (mH): 21.23
- Outer Dimension: 695.5*149.6*623mm
- Weight: 175kg
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