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Related Concept Videos

Diamagnetism01:26

Diamagnetism

2.8K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.8K
Ferromagnetism01:31

Ferromagnetism

2.8K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.8K
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.9K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.9K
Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

2.9K
In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
2.9K
Energy In A Magnetic Field01:24

Energy In A Magnetic Field

1.6K
If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
1.6K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

922
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
922

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Related Experiment Video

Updated: Apr 24, 2026

A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries
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Magnet design for a low-emittance storage ring.

Martin Johansson1, Bengt Anderberg2, Lars Johan Lindgren1

  • 1MAX IV Laboratory, Lund University, Lund, Sweden.

Journal of Synchrotron Radiation
|September 2, 2014
PubMed
Summary
This summary is machine-generated.

The MAX IV 3 GeV storage ring uses integrated magnet blocks for a compact, stable, and precisely aligned multi-bend achromat lattice. This manufacturing approach ensures quality and cost-effectiveness for the accelerator construction.

Keywords:
acceleratorlow emittancemagnetmagnet blockmulti-bend achromat

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Area of Science:

  • Accelerator Physics
  • Particle Beam Technology
  • Mechanical Engineering

Background:

  • The MAX IV 3 GeV storage ring aims for low electron beam emittance using a multi-bend achromat magnet lattice.
  • Traditional accelerator construction involves numerous individual magnets requiring extensive field measurement and adjustment.
  • This approach presents challenges in terms of space, stability, and alignment precision.

Purpose of the Study:

  • To detail the engineering implementation of an integrated magnet block design for the MAX IV 3 GeV storage ring.
  • To present mechanical and magnetic field measurement results from the magnet production series.
  • To assess the manufacturing feasibility, cost, and risk associated with this novel magnet block concept.

Main Methods:

  • Precision machining of multiple consecutive magnet elements from single solid iron blocks (2.3-3.4m long).
  • Utilizing Computer Numerical Control (CNC) machining to ensure intrinsic alignment of magnet elements within integrated units.
  • Outsourcing the production series to industry with rigorous mechanical and magnetic quality assurance (QA) protocols.

Main Results:

  • Successfully produced 140 integrated magnet block units, replacing 1320 individual magnets.
  • Mechanical and magnetic QA results conform to specifications, indicating successful implementation of the design.
  • The production series, outsourced to industry, is progressing on schedule and within budget.

Conclusions:

  • The integrated magnet block design offers compactness and enhanced vibration stability.
  • Alignment precision is achieved through mechanical accuracy, reducing reliance on individual field adjustments.
  • The manufacturing approach, using mature techniques, is cost-effective and low-risk, validating the MAX IV magnet block concept.