Home / Examples / Magnetic Analysis (Gauss, Static Analysis/Harmonic analysis) / Example 22: Magnetic Field around Cathode

Example 22: Magnetic Field around Cathode

General

Magnetic field around the cathode of a sputtering machine is analyzed.
The vectors of the magnetic field and the magnetic flux density are solved.
Unless specified in the list below, the default conditions will be applied.
Obtain this session's project file. (Right-click and choose 'Save link as')

Results will vary depending on Femtet version and the PC environment.

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

Analysis Conditions

Item	Settings
Solver	Magnetic Analysis [Gauss]
Analysis Type	Static Analysis
Options	N/A

Model

A yoke and multiple magnets are defined.

As the model is symmetric, a one-fourth part is analyzed.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
22/Solid	Yoke	Yoke
9/Solid	MagOut	Mag
10/Solid	MagOut	Mag
11/Solid	MagOut	Mag
17/Solid	MagOut	Mag
18/Solid	MagOut	Mag
19/Solid	MagOut	Mag
21/Solid	MagCenter	Mag

* Available from the material DB

The material properties are set up as follows:

Material Name	Tab	Properties
Mag	Permeability	Material Type: Permanent Magnet
Mag	Magnet	Magnetization Strength: 1.0

The material properties are set up as follows:

Body Attribute Name	Tab	Settings
MagOut	Direction	Vector: X=0.0, Y=0.0, Z=-1.0
MagCenter	Direction	Vector: X=0.0, Y=0.0, Z=1.0

Boundary Conditions

The model is 1/4 symmetric. Symmetric boundary is applied to two faces of symmetry.

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Setting
Sym1/Face	Symmetry/Continuity	Face of Symmetry
Sym2/Face	Symmetry/Continuity	Face of Symmetry

Results

The vectors of the magnetic flux density are shown below.

The magnetic flux originated from the magnet, placed in the peripheral, flows through the yoke into the magnet in the center.

The vectors of the magnetic field are shown below.